Sandy Bay Weather Center
Weather Center


X

ANZ230 Boston Harbor

Expires:202603041600;;585596
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ230-041600-
Boston Harbor-
1006 PM EST Tue Mar 3 2026

.OVERNIGHT...E winds around 5 kt, becoming W. Waves 1 foot or
less. Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Waves
1 foot or less. 
.WED NIGHT...SW winds around 5 kt. Waves 1 foot or less. 
.THU...NW winds around 5 kt, becoming NE in the afternoon. Waves
1 foot or less, then around 2 ft in the afternoon. Areas of fog
in the afternoon. A chance of rain in the afternoon. 
.THU NIGHT AND FRI...NE winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 3 ft. Rain. Sleet through the day, then a chance of
rain in the afternoon. 
.FRI NIGHT...NE winds 10 to 15 kt, becoming E around 5 kt after
midnight. Waves 1 foot or less, except 2 to 4 ft at the outer
harbor entrance. 
.SAT...S winds 15 to 20 kt. Waves around 2 ft. 
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
around 2 ft. Rain likely. 
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft. A chance of rain. 
.SUN NIGHT...SW winds 10 to 15 kt. Waves around 2 ft.  

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


	
X

ANZ231 Cape Cod Bay

		
Expires:202603041600;;585587
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ231-041600-
Cape Cod Bay-
1006 PM EST Tue Mar 3 2026

.OVERNIGHT...SE winds 5 to 10 kt, becoming W with gusts up to
20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SE
1 foot at 4 seconds. Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot at
2 seconds. Areas of fog in the morning. 
.WED NIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 8 seconds and W 1 foot at 3 seconds. 
.THU...S winds around 5 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 9 seconds and S 1 foot at
2 seconds. Areas of fog. A chance of rain in the afternoon. Vsby
1 to 3 NM. 
.THU NIGHT...E winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: E
2 ft at 3 seconds and SE 2 ft at 10 seconds. Rain. Areas of fog
in the evening with vsby 1 NM or less. 
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: SE 3 ft at 11 seconds and NE 2 ft at
3 seconds. Rain likely, mainly in the morning. 
.FRI NIGHT...E winds 5 to 10 kt. Seas 2 to 4 ft. 
.SAT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft. 
.SAT NIGHT AND SUN...SW winds 15 to 20 kt, becoming W 10 to
15 kt. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain. 
.SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.  

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


	        
X

ANZ232 Nantucket Sound

Expires:202603041600;;585591
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ232-041600-
Nantucket Sound-
1006 PM EST Tue Mar 3 2026

.OVERNIGHT...S winds 5 to 10 kt, becoming W 10 to 15 kt. Gusts up
to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 2 ft at 5 seconds and
SE 2 ft at 8 seconds. Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas
2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at
8 seconds. Areas of fog in the morning with vsby 1 to 3 NM. 
.WED NIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 7 seconds. Areas of fog. Vsby 1 NM or less. 
.THU...S winds around 5 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: S 2 ft at 7 seconds and E 1 foot at
2 seconds. Areas of fog. A chance of rain in the afternoon. Vsby
1 NM or less. 
.THU NIGHT...E winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and SE
2 ft at 11 seconds. Rain. Areas of fog in the evening with vsby
1 NM or less. 
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: E 2 ft at 4 seconds and SE 2 ft at 11 seconds.
Rain likely, mainly in the morning. 
.FRI NIGHT...NE winds 10 to 15 kt, becoming E 5 to 10 kt after
midnight. Seas 2 to 4 ft. 
.SAT...S winds 15 to 20 kt. Seas 2 to 4 ft. 
.SAT NIGHT...SW winds 20 to 25 kt. Seas 3 to 5 ft. A chance of
rain. 
.SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of rain. 
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.  

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


	                	
X

ANZ233 Vinyard Sound

Expires:202603041600;;585592
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ233-041600-
Vineyard Sound-
1006 PM EST Tue Mar 3 2026

.OVERNIGHT...S winds 5 to 10 kt, becoming SW with gusts up to
20 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 8 seconds and SW
2 ft at 4 seconds. Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas
2 to 4 ft. Wave Detail: S 4 ft at 8 seconds and SW 1 foot at
4 seconds. Areas of fog in the morning. 
.WED NIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: S
3 ft at 8 seconds and SW 1 foot at 5 seconds. Areas of fog. Vsby
1 to 3 NM, decreasing to 1 NM or less after midnight. 
.THU...SE winds around 5 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: S 2 ft at 7 seconds and E 1 foot at
2 seconds. Areas of fog. A chance of rain in the afternoon. Vsby
1 NM or less, increasing to 1 to 3 NM in the afternoon. 
.THU NIGHT...E winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 10 seconds and
E 1 foot at 2 seconds. Rain. Areas of fog in the evening with
vsby 1 NM or less. 
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: NE 2 ft at 3 seconds and S 1 foot at
5 seconds. Rain likely, mainly in the morning. 
.FRI NIGHT...NE winds 10 to 15 kt, becoming E 5 to 10 kt after
midnight. Seas 2 to 3 ft. 
.SAT...S winds 15 to 20 kt. Seas 2 to 3 ft. 
.SAT NIGHT...SW winds 20 to 25 kt. Seas 3 to 5 ft. A chance of
rain. 
.SUN...SW winds 15 to 20 kt. Seas 2 to 4 ft. A chance of rain. 
.SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. 

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


		                	
X

ANZ234 Buzzards Bay

Expires:202603041600;;585593
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ234-041600-
Buzzards Bay-
1006 PM EST Tue Mar 3 2026

.OVERNIGHT...S winds 5 to 10 kt, becoming SW with gusts up to
20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and SW
2 ft at 3 seconds. Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and E 1 foot at
4 seconds. Areas of fog in the morning. 
.WED NIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 8 seconds and SW 1 foot at 5 seconds. Areas of fog.
Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. 
.THU...SE winds around 5 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and E 1 foot at
2 seconds. Areas of fog. A chance of rain in the afternoon. Vsby
1 NM or less. 
.THU NIGHT...NE winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds
and E 1 foot at 2 seconds. Rain. Areas of fog in the evening with
vsby 1 NM or less. 
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: NE 2 ft at 3 seconds and SE 2 ft at
11 seconds. Rain likely, mainly in the morning. 
.FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. 
.SAT...S winds 15 to 20 kt. Seas 2 to 3 ft. 
.SAT NIGHT AND SUN...SW winds 20 to 25 kt, diminishing to 10 to
15 kt. Seas 2 to 4 ft. A chance of rain. 
.SUN NIGHT...SW winds 10 to 15 kt. Seas around 2 ft.  

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


		              	
X

ANZ235 Rhode Island Sound

Expires:202603041600;;585594
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ235-041600-
Rhode Island Sound-
1006 PM EST Tue Mar 3 2026

.OVERNIGHT...S winds 5 to 10 kt, becoming SW with gusts up to
20 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 8 seconds and SE
1 foot at 5 seconds. Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas
3 to 5 ft. Wave Detail: S 5 ft at 8 seconds and SW 1 foot at
3 seconds. Areas of fog in the morning with vsby 1 to 3 NM. 
.WED NIGHT...SW winds around 5 kt. Seas 3 to 4 ft. Wave Detail: S
4 ft at 8 seconds. Areas of fog. Vsby 1 to 3 NM, decreasing to
1 NM or less after midnight. 
.THU...E winds around 5 kt, becoming NE in the afternoon. Seas
2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and SE 2 ft at
12 seconds. Areas of fog. A chance of rain. Vsby 1 NM or less. 
.THU NIGHT...NE winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E
3 ft at 4 seconds and SE 3 ft at 10 seconds. Rain. Areas of fog
in the evening with vsby 1 NM or less. 
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: NE 3 ft at 4 seconds and SE 3 ft at
11 seconds. Rain likely, mainly in the morning. 
.FRI NIGHT...NE winds 10 to 15 kt, becoming E 5 to 10 kt after
midnight. Seas 2 to 4 ft. 
.SAT...S winds 15 to 20 kt. Seas 2 to 4 ft. 
.SAT NIGHT...SW winds 20 to 25 kt. Seas 4 to 6 ft. A chance of
rain. 
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of rain. 
.SUN NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. 

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


		
X

ANZ236 Narragansett Bay

Expires:202603041600;;585597
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ236-041600-
Narragansett Bay-
1006 PM EST Tue Mar 3 2026

.OVERNIGHT...SE winds around 5 kt, becoming SW. Waves 2 to 3 ft.
Areas of fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM. 
.WED...NW winds around 5 kt, becoming S in the afternoon. Waves
2 to 3 ft. Areas of fog in the morning. 
.WED NIGHT...SW winds around 5 kt. Waves 2 to 3 ft. Areas of fog.
Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. 
.THU...NE winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. Waves 2 to 3 ft. Areas of fog. A chance of rain. Vsby
1 NM or less. 
.THU NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. Rain. Areas of
fog in the evening with vsby 1 NM or less. 
.FRI...NE winds 10 to 15 kt. Waves 2 to 3 ft. Rain likely, mainly
in the morning. 
.FRI NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft.
.SAT...S winds 15 to 20 kt. Waves 2 to 3 ft. 
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
2 to 4 ft. A chance of rain. 
.SUN...W winds 10 to 15 kt. Waves 2 to 3 ft. A chance of rain. 
.SUN NIGHT...SW winds 5 to 10 kt. Waves 2 to 3 ft. 

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
www.facebook.com/us.nationalweatherservice.boston.gov

You can follow us on Twitter at
@NWSBoston

			
X

ANZ237 Block Island Sound

Expires:202603041600;;585595
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ237-041600-
Block Island Sound-
1006 PM EST Tue Mar 3 2026

.OVERNIGHT...SE winds 5 to 10 kt, becoming SW with gusts up to
20 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 8 seconds and SE
1 foot at 5 seconds. Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 5 to 10 kt with gusts up to 20 kt, becoming SW in
the afternoon. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 8 seconds.
Areas of fog in the morning with vsby 1 NM or less. 
.WED NIGHT...W winds around 5 kt. Seas 3 to 4 ft. Wave Detail: SE
4 ft at 8 seconds. Areas of fog. Vsby 1 NM or less. 
.THU...NE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft
at 7 seconds and SE 1 foot at 12 seconds. Areas of fog. A chance
of rain. Vsby 1 NM or less. 
.THU NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and SE
3 ft at 12 seconds. Rain. Areas of fog in the evening with vsby
1 NM or less. 
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: E 3 ft at 4 seconds and SE 3 ft at 11 seconds.
Rain likely in the morning. 
.FRI NIGHT...NE winds 5 to 10 kt. Seas 2 to 4 ft. 
.SAT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. 
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. A chance of rain. 
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of rain. 
.SUN NIGHT...SW winds around 10 kt. Seas 2 to 4 ft.  

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


			
X

ANZ250 Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary

Expires:202603041600;;585585
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ250-041600-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1006 PM EST Tue Mar 3 2026

.OVERNIGHT...SE winds around 10 kt, becoming W with gusts up to
20 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and SE
3 ft at 9 seconds. Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 5 to 10 kt with gusts up to 20 kt, becoming SW in
the afternoon. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds
and W 1 foot at 3 seconds. 
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE
4 ft at 9 seconds. 
.THU...W winds around 5 kt, becoming NE 10 to 15 kt with gusts up
to 25 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and NE 1 foot at 3 seconds. Areas of fog in the
afternoon. A chance of rain in the afternoon. 
.THU NIGHT...E winds 15 to 20 kt. Seas 4 to 6 ft. Wave Detail: E
4 ft at 5 seconds and SE 3 ft at 10 seconds. Rain. Areas of fog
in the evening with vsby 1 NM or less. 
.FRI...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
8 ft. Wave Detail: E 7 ft at 10 seconds and NE 6 ft at 6 seconds.
Rain and sleet likely in the morning, then a chance of rain in
the afternoon. 
.FRI NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
becoming E 5 to 10 kt after midnight. Seas 6 to 8 ft. 
.SAT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
7 ft. 
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft. A chance of rain. 
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of rain. 
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft.  

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


	
X

ANZ251 Massachusetts Bay and Ipswich Bay

Expires:202603041600;;585586
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ251-041600-
Massachusetts Bay and Ipswich Bay-
1006 PM EST Tue Mar 3 2026

.OVERNIGHT...SE winds 5 to 10 kt, becoming W. Seas around 2 ft.
Wave Detail: SE 2 ft at 4 seconds and E 2 ft at 9 seconds. Areas
of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 8 seconds and W 1 foot at
2 seconds. 
.WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 11 seconds. 
.THU...NW winds around 5 kt, becoming NE 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 11 seconds and NE 1 foot at 3 seconds. Areas of fog in
the afternoon. A chance of rain in the afternoon. 
.THU NIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Seas 2 to 3 ft, building to 3 to 5 ft after
midnight. Wave Detail: E 3 ft at 4 seconds and SE 2 ft at
11 seconds, becoming E 4 ft at 5 seconds and SE 2 ft at
10 seconds. Rain. Sleet after midnight. Areas of fog in the
evening with vsby 1 NM or less. 
.FRI...NE winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Seas 4 to 6 ft. Wave Detail: NE 5 ft at 6 seconds and
E 5 ft at 11 seconds. Rain and sleet likely in the morning, then
a chance of rain in the afternoon. 
.FRI NIGHT...NE winds 10 to 15 kt, becoming E 5 to 10 kt after
midnight. Seas 4 to 6 ft. 
.SAT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft. 
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. A chance of rain. 
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of rain. 
.SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. 

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


		
X

ANZ254 Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM

 
Expires:202603041600;;585588
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ254-041600-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1006 PM EST Tue Mar 3 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING...

.OVERNIGHT...S winds 10 to 15 kt, becoming W. Gusts up to 30 kt.
Seas 4 to 6 ft. Wave Detail: SE 6 ft at 8 seconds and SE 3 ft at
5 seconds. Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 10 to 15 kt with gusts up to 25 kt, diminishing to
around 5 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: SE
6 ft at 8 seconds and W 1 foot at 4 seconds. Areas of fog in the
morning with vsby 1 to 3 NM.
.WED NIGHT...SW winds around 5 kt. Seas 3 to 5 ft. Wave Detail:
SE 5 ft at 8 seconds. Areas of fog. Vsby 1 NM or less. 
.THU...S winds around 5 kt, becoming E in the afternoon. Seas
2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and SE 1 foot at
12 seconds. Areas of fog. A chance of rain in the afternoon. Vsby
1 NM or less. 
.THU NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. Wave Detail: E 3 ft at 4 seconds and SE 3 ft at
10 seconds. Rain likely. Areas of fog in the evening with vsby
1 NM or less. 
.FRI...NE winds 15 to 20 kt. Seas 5 to 8 ft. Wave Detail: SE 7 ft
at 11 seconds and E 5 ft at 5 seconds. Rain likely, mainly in the
morning. 
.FRI NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
becoming E 5 to 10 kt after midnight. Seas 6 to 8 ft. 
.SAT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
8 ft. 
.SAT NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas
5 to 7 ft. A chance of rain. 
.SUN...W winds 15 to 20 kt. Seas 4 to 6 ft. A chance of rain. 
.SUN NIGHT...SW winds around 10 kt. Seas 3 to 5 ft.  

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


		
X

ANZ255 Coastal waters extending out to 25 NM south of Martha’s Vineyard and Nantucket

Expires:202603041600;;585589
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ255-041600-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1006 PM EST Tue Mar 3 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING...

.OVERNIGHT...SW winds 10 to 15 kt with gusts up to 30 kt. Seas
5 to 7 ft. Wave Detail: S 7 ft at 8 seconds and SE 1 foot at
5 seconds. Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 10 to 15 kt with gusts up to 25 kt, diminishing to
around 5 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: S 6 ft
at 8 seconds and W 1 foot at 3 seconds. Areas of fog in the
morning with vsby 1 to 3 NM.
.WED NIGHT...SW winds around 5 kt. Seas 3 to 5 ft. Wave Detail: S
5 ft at 8 seconds. Areas of fog. Vsby 1 NM or less. 
.THU...SE winds around 5 kt, becoming NE in the afternoon. Seas
2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and SE 1 foot at
12 seconds. Areas of fog. A chance of rain in the afternoon. Vsby
1 NM or less. 
.THU NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft, building to 3 to 5 ft after midnight.
Wave Detail: SE 3 ft at 9 seconds and SE 2 ft at 12 seconds,
becoming SE 3 ft at 5 seconds and SE 3 ft at 11 seconds. Rain
likely. Areas of fog in the evening with vsby 1 NM or less. 
.FRI...NE winds 15 to 20 kt. Seas 4 to 6 ft. Wave Detail: E 4 ft
at 5 seconds and SE 3 ft at 11 seconds. Rain likely, mainly in
the morning. 
.FRI NIGHT...NE winds 10 to 15 kt, becoming E 5 to 10 kt after
midnight. Seas 4 to 6 ft. 
.SAT...S winds 15 to 20 kt. Seas 4 to 6 ft. 
.SAT NIGHT AND SUN...SW winds 20 to 25 kt with gusts up to 30 kt,
diminishing to 15 to 20 kt. Seas 5 to 8 ft. A chance of rain. 
.SUN NIGHT...SW winds 10 to 15 kt. Seas 3 to 5 ft. 

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


		
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ANZ256 Coastal waters from Montauk NY to Martha’s Vineyard extending out to 20 NM south of Block Island

Expires:202603041600;;585590
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ256-041600-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1006 PM EST Tue Mar 3 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING...

.OVERNIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt. Gusts
up to 25 kt. Seas 4 to 6 ft. Wave Detail: S 6 ft at 8 seconds.
Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas
4 to 6 ft. Wave Detail: SE 6 ft at 8 seconds. Areas of fog in the
morning with vsby 1 NM or less. 
.WED NIGHT...SW winds around 5 kt. Seas 4 to 5 ft. Wave Detail:
SE 5 ft at 8 seconds. Areas of fog. Vsby 1 to 3 NM, decreasing to
1 NM or less after midnight. 
.THU...E winds around 5 kt, becoming NE 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SE 4 ft
at 8 seconds and SE 3 ft at 11 seconds. Areas of fog. A chance of
rain. Vsby 1 NM or less. 
.THU NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. Wave Detail: SE 3 ft at 5 seconds and SE 3 ft at
10 seconds. Rain. Areas of fog in the evening with vsby 1 NM or
less. 
.FRI...NE winds 15 to 20 kt. Seas 4 to 6 ft. Wave Detail: NE 4 ft
at 5 seconds and SE 3 ft at 11 seconds. Rain likely in the
morning. 
.FRI NIGHT...NE winds 10 to 15 kt, becoming E 5 to 10 kt after
midnight. Seas 4 to 5 ft. 
.SAT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft. 
.SAT NIGHT AND SUN...SW winds 20 to 25 kt with gusts up to 30 kt,
diminishing to 15 to 20 kt. Seas 5 to 8 ft. A chance of rain. 
.SUN NIGHT...SW winds 10 to 15 kt. Seas 4 to 5 ft. 

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


		
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ANZ270 Ocean waters from Merrimack River to Plymouth from 40 to 60 NM offshore

			
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ANZ271 Ocean waters from Provincetown to Nantucket from 20 to 35 NM offshore

		
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ANZ272 Ocean waters from Martha’s Vineyard to Nantucket from 25 to 40 NM offshore

		
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ANZ273 Ocean waters from Montauk NY to Martha’s Vineyard from 25 to 40 NM offshore

 
		
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ANZ230 Boston Harbor

 
Expires:202603041600;;585596
FZUS51 KBOX 040307
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EST Tue Mar 3 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM


ANZ230-041600-
Boston Harbor-
1006 PM EST Tue Mar 3 2026

.OVERNIGHT...E winds around 5 kt, becoming W. Waves 1 foot or
less. Areas of fog. Rain. Vsby 1 NM or less. 
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Waves
1 foot or less. 
.WED NIGHT...SW winds around 5 kt. Waves 1 foot or less. 
.THU...NW winds around 5 kt, becoming NE in the afternoon. Waves
1 foot or less, then around 2 ft in the afternoon. Areas of fog
in the afternoon. A chance of rain in the afternoon. 
.THU NIGHT AND FRI...NE winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 3 ft. Rain. Sleet through the day, then a chance of
rain in the afternoon. 
.FRI NIGHT...NE winds 10 to 15 kt, becoming E around 5 kt after
midnight. Waves 1 foot or less, except 2 to 4 ft at the outer
harbor entrance. 
.SAT...S winds 15 to 20 kt. Waves around 2 ft. 
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
around 2 ft. Rain likely. 
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft. A chance of rain. 
.SUN NIGHT...SW winds 10 to 15 kt. Waves around 2 ft.  

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$


		


  • Click on a zone to display the forecast for that area.
ANZ230 Boston Harbor ANZ231 Cape Cod Bay ANZ232 Nantucket Sound ANZ233 Vinyard Sound ANZ234 Buzzards Bay ANZ235 Rhode Island Sound ANZ236 Narragansett Bay ANZ237 Block Island Sound ANZ250 Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary ANZ251 Massachusetts Bay and Ipswich Bay ANZ254 Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM ANZ255 Coastal waters extending out to 25 NM south of Martha’s Vineyard and Nantucket ANZ256 Coastal waters from Montauk NY to Martha’s Vineyard extending out to 20 NM south of Block Island ANZ270 Ocean waters from Merrimack River to Plymouth from 40 to 60 NM offshore ANZ271 Ocean waters from Provincetown to Nantucket from 20 to 35 NM offshore ANZ272 Ocean waters from Martha’s Vineyard to Nantucket from 25 to 40 NM offshore ANZ273 Ocean waters from Montauk NY to Martha’s Vineyard from 25 to 40 NM offshore ANZ230 Boston Harbor ANZ231 Cape Cod Bay ANZ232 Nantucket Sound ANZ233 Vinyard Sound ANZ234 Buzzards Bay ANZ235 Rhode Island Sound ANZ236 Narragansett Bay ANZ237 Block Island Sound ANZ250 Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary ANZ251 Massachusetts Bay and Ipswich Bay ANZ254 Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM ANZ255 Coastal waters extending out to 25 NM south of Martha’s Vineyard and Nantucket ANZ256 Coastal waters from Montauk NY to Martha’s Vineyard extending out to 20 NM south of Block Island ANZ270 Ocean waters from Merrimack River to Plymouth from 40 to 60 NM offshore ANZ271 Ocean waters from Provincetown to Nantucket from 20 to 35 NM offshore ANZ272 Ocean waters from Martha’s Vineyard to Nantucket from 25 to 40 NM offshore ANZ273 Ocean waters from Montauk NY to Martha’s Vineyard from 25 to 40 NM offshore

 

 



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