Sandy Bay Weather Center
Weather Center


X

ANZ230 Boston Harbor

Expires:202501221600;;485270
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ230-221600-
Boston Harbor-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds around 10 kt. Gusts up to 20 kt. Waves
1 foot or less, then around 2 ft. 
.WED...NW winds 5 to 10 kt. Waves around 2 ft in the morning,
then 1 foot or less. 
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 
.THU...SW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon. 
.THU NIGHT THROUGH FRI NIGHT...NW winds around 10 kt. Waves
1 foot or less. 
.SAT THROUGH SUN NIGHT...W winds 15 to 20 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:202501221600;;485261
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ231-221600-
Cape Cod Bay-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt. Seas 1 foot
or less, then around 2 ft. Wave Detail: N 1 foot at 4 seconds and
SE 1 foot at 8 seconds, becoming NW 2 ft at 4 seconds and SE
1 foot at 8 seconds. A slight chance of light snow. A slight
chance of snow with vsby 1 NM or less. 
.WED...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N
2 ft at 4 seconds and SE 1 foot at 8 seconds. Light freezing
spray in the morning. 
.WED NIGHT...W winds around 5 kt, becoming SW after midnight.
Seas around 2 ft in the evening, then 1 foot or less. Wave
Detail: N 1 foot at 4 seconds and SE 1 foot at 8 seconds,
becoming N 1 foot at 4 seconds and SE 1 foot at 7 seconds. 
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and NE
1 foot at 5 seconds. 
.THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt. Seas around
2 ft. Wave Detail: NW 2 ft at 4 seconds and E 1 foot at
5 seconds. 
.SAT THROUGH SUN NIGHT...W winds 15 to 20 kt with gusts up to
25 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and SE
1 foot at 8 seconds.  

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:202501221600;;485265
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ232-221600-
Nantucket Sound-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt. Seas 1 foot
or less, then around 2 ft. Wave Detail: NW 1 foot at 4 seconds
and S 1 foot at 8 seconds, becoming N 2 ft at 4 seconds and S
1 foot at 8 seconds. A chance of snow. Vsby 1 to 3 NM, decreasing
to 1 NM or less. 
.WED...N winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot
at 8 seconds. 
.WED NIGHT...NW winds around 5 kt, becoming SW after midnight.
Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and SE
1 foot at 8 seconds. 
.THU...SW winds 10 to 15 kt. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and E
1 foot at 7 seconds, becoming SW 2 ft at 3 seconds and E 1 foot
at 6 seconds. 
.THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt. Seas around
2 ft. Wave Detail: W 2 ft at 3 seconds and E 1 foot at 5 seconds.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: N 2 ft at 3 seconds and SE 1 foot at
8 seconds. 
.SAT NIGHT THROUGH SUN NIGHT...W winds 15 to 20 kt with gusts up
to 25 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

ANZ233 Vinyard Sound

Expires:202501221600;;485266
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ233-221600-
Vineyard Sound-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt. Seas 1 foot
or less, then around 2 ft. Wave Detail: W 1 foot at 5 seconds and
S 1 foot at 8 seconds, becoming NW 2 ft at 5 seconds and S 1 foot
at 8 seconds. A chance of snow. Vsby 1 NM or less. 
.WED...N winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas around 2 ft in the morning, then 1 foot or less. Wave
Detail: N 2 ft at 4 seconds and S 1 foot at 8 seconds, becoming N
1 foot at 3 seconds and S 1 foot at 8 seconds. 
.WED NIGHT...W winds around 5 kt, becoming S after midnight. Seas
1 foot or less. Wave Detail: NE 1 foot at 3 seconds and W 1 foot
at 4 seconds. 
.THU...SW winds 10 to 15 kt. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and NE
1 foot at 6 seconds, becoming SW 2 ft at 4 seconds and NE 1 foot
at 6 seconds. 
.THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt. Seas around
2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
6 seconds. 
.SAT...W winds 15 to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft
at 4 seconds and N 1 foot at 3 seconds. 
.SAT NIGHT THROUGH SUN NIGHT...W winds 20 to 25 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

ANZ234 Buzzards Bay

Expires:202501221600;;485267
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ234-221600-
Buzzards Bay-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at
4 seconds and S 1 foot at 8 seconds. A slight chance of light
snow, then a slight chance of snow with vsby 1 to 3 NM. 
.WED...N winds 10 to 15 kt with gusts up to 20 kt, becoming NW
5 to 10 kt in the afternoon. Seas around 2 ft in the morning,
then 1 foot or less. Wave Detail: N 2 ft at 4 seconds and S
1 foot at 8 seconds, becoming N 1 foot at 3 seconds and S 1 foot
at 8 seconds. 
.WED NIGHT...SW winds around 5 kt. Seas 1 foot or less. Wave
Detail: NE 1 foot at 3 seconds and W 1 foot at 4 seconds. 
.THU...SW winds 10 to 15 kt. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and NE
1 foot at 5 seconds, becoming SW 2 ft at 4 seconds and E 1 foot
at 6 seconds. 
.THU NIGHT THROUGH FRI NIGHT...NW winds around 10 kt. Seas around
2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
6 seconds. 
.SAT...W winds 15 to 20 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 4 seconds and N 1 foot at 4 seconds. 
.SAT NIGHT THROUGH SUN NIGHT...W winds 15 to 20 kt with gusts up
to 25 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

ANZ235 Rhode Island Sound

Expires:202501221600;;485268
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ235-221600-
Rhode Island Sound-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt. Seas around
2 ft. Wave Detail: W 2 ft at 5 seconds and S 2 ft at 8 seconds. A
chance of snow. Vsby 1 to 3 NM, decreasing to 1 NM or less. 
.WED...N winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and
SE 2 ft at 8 seconds. 
.WED NIGHT...W winds around 5 kt, becoming SW after midnight.
Seas 1 foot or less. Wave Detail: W 1 foot at 3 seconds and NE
1 foot at 3 seconds. 
.THU...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 3 seconds and SE 1 foot at 8 seconds. 
.THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 9 seconds.
.SAT...W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft
at 4 seconds and S 2 ft at 8 seconds. 
.SAT NIGHT THROUGH SUN NIGHT...W winds 20 to 25 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

ANZ236 Narragansett Bay

Expires:202501221600;;485271
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ236-221600-
Narragansett Bay-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds 5 to 10 kt. Waves around 2 ft. A slight
chance of light snow. 
.WED...N winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Waves around 2 ft. 
.WED NIGHT...SW winds around 5 kt. Waves 1 foot or less. 
.THU...SW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon. 
.THU NIGHT THROUGH FRI NIGHT...NW winds 5 to 10 kt. Waves around
2 ft. 
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft. 
.SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves
3 to 5 ft. 
.SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Waves 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.

$$

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X

ANZ237 Block Island Sound

Expires:202501221600;;485269
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ237-221600-
Block Island Sound-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt. Seas around
2 ft. Wave Detail: NW 2 ft at 3 seconds and S 2 ft at 8 seconds.
A chance of snow. Vsby 1 to 3 NM. 
.WED...N winds 10 to 15 kt with gusts up to 20 kt, becoming NW
5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N
2 ft at 3 seconds and SE 2 ft at 8 seconds. 
.WED NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: W 1 foot at 3 seconds and NE 1 foot at 3 seconds. 
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and
SE 1 foot at 8 seconds. 
.THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt. Seas around
2 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 9 seconds. 
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: NW 2 ft at 3 seconds and SE 2 ft at 8 seconds.
.SAT NIGHT THROUGH SUN NIGHT...W winds 15 to 20 kt with gusts up
to 25 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

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

Expires:202501221600;;485259
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ250-221600-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at
9 seconds. 
.WED...NW winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and SE 1 foot at
8 seconds. Light freezing spray in the morning. 
.WED NIGHT...W winds 5 to 10 kt, becoming SW 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and NE
1 foot at 4 seconds. 
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at
7 seconds. 
.THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and
SE 2 ft at 9 seconds. 
.SAT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at 8 seconds. 
.SAT NIGHT THROUGH SUN NIGHT...W winds 15 to 20 kt with gusts up
to 25 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

ANZ251 Massachusetts Bay and Ipswich Bay

Expires:202501221600;;485260
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ251-221600-
Massachusetts Bay and Ipswich Bay-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt. Seas around
2 ft. Wave Detail: N 2 ft at 3 seconds and SE 1 foot at
9 seconds. 
.WED...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N
2 ft at 4 seconds and E 1 foot at 9 seconds. 
.WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
W 1 foot at 3 seconds and NE 1 foot at 4 seconds. 
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at
7 seconds. 
.THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and
SE 1 foot at 4 seconds. 
.SAT THROUGH SUN NIGHT...W winds 15 to 20 kt with gusts up to
25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 3 seconds and E
1 foot at 8 seconds.  

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:202501221600;;485262
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ254-221600-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at 8 seconds.
A chance of snow, then snow likely. Vsby 1 to 3 NM, decreasing to
1 NM or less. 
.WED...N winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: N 3 ft at 5 seconds and
SE 2 ft at 8 seconds. Light freezing spray. Vsby 1 to 3 NM in the
morning. 
.WED NIGHT...NW winds 5 to 10 kt, becoming SW after midnight.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and SE 1 foot at
8 seconds. 
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: W 2 ft at 4 seconds and NE 2 ft at 6 seconds. 
.THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and E
2 ft at 6 seconds. 
.SAT...W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft
at 4 seconds and S 2 ft at 8 seconds. 
.SAT NIGHT THROUGH SUN NIGHT...W winds 15 to 20 kt with gusts up
to 25 kt. Seas 4 to 6 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:202501221600;;485263
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ255-221600-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds around 10 kt, becoming N 15 to 20 kt. Seas
2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and S 2 ft at
8 seconds. Snow likely. Vsby 1 NM or less. 
.WED...N winds 15 to 20 kt with gusts up to 25 kt, diminishing to
10 to 15 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft
at 4 seconds and S 2 ft at 8 seconds. Light freezing spray. 
.WED NIGHT...N winds 5 to 10 kt, becoming S after midnight. Seas
2 to 3 ft. Wave Detail: N 1 foot at 4 seconds and S 1 foot at
7 seconds. 
.THU...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft
at 4 seconds and E 2 ft at 7 seconds. 
.THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E
2 ft at 6 seconds. 
.SAT...W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W 4 ft
at 5 seconds and S 2 ft at 8 seconds. 
.SAT NIGHT THROUGH SUN NIGHT...W winds 20 to 25 kt. Seas 4 to
6 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

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

Expires:202501221600;;485264
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ256-221600-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds 10 to 15 kt, increasing to 15 to 20 kt with
gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at
4 seconds and S 2 ft at 8 seconds. A chance of snow. Vsby 1 NM or
less. 
.WED...N winds 15 to 20 kt with gusts up to 25 kt, diminishing to
10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 3 ft
at 4 seconds and SE 2 ft at 8 seconds. Light freezing spray in
the morning. 
.WED NIGHT...W winds around 5 kt, becoming SW after midnight.
Seas around 2 ft in the evening, then 1 foot or less. Wave
Detail: NW 1 foot at 4 seconds and NE 1 foot at 4 seconds,
becoming SW 1 foot at 3 seconds and NE 1 foot at 3 seconds. 
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at
9 seconds. 
.THU NIGHT THROUGH FRI NIGHT...NW winds 15 to 20 kt. Seas 2 to
4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 9 seconds.
.SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: W 3 ft at 4 seconds and S 2 ft at 8 seconds. 
.SAT NIGHT AND SUN...W winds 20 to 25 kt. Seas 5 to 7 ft. 
.SUN NIGHT...W winds 20 to 25 kt. Seas 4 to 6 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

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

			
X

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

		
X

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

		
X

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

 
		
X

ANZ230 Boston Harbor

 
Expires:202501221600;;485270
FZUS51 KBOX 220305
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Tue Jan 21 2025

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


ANZ230-221600-
Boston Harbor-
1004 PM EST Tue Jan 21 2025

.OVERNIGHT...NW winds around 10 kt. Gusts up to 20 kt. Waves
1 foot or less, then around 2 ft. 
.WED...NW winds 5 to 10 kt. Waves around 2 ft in the morning,
then 1 foot or less. 
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 
.THU...SW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon. 
.THU NIGHT THROUGH FRI NIGHT...NW winds around 10 kt. Waves
1 foot or less. 
.SAT THROUGH SUN NIGHT...W winds 15 to 20 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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