ANZ230 Boston Harbor

Expires:202509152100;;011270
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ230-152100-
Boston Harbor-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds 5 to 10 kt. Waves 1 foot or less. 
.TONIGHT...E winds 5 to 10 kt, becoming N after midnight. Waves
1 foot or less. Patchy fog after midnight with vsby 1 NM or less.
.TUE...NE winds around 5 kt, becoming E in the afternoon. Waves
1 foot or less. Patchy fog. Vsby 1 to 3 NM in the morning. 
.TUE NIGHT...SE winds 5 to 10 kt, becoming S after midnight.
Waves 1 foot or less. 
.WED...SE winds 5 to 10 kt. Waves 1 foot or less.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. 
.THU THROUGH FRI NIGHT...N winds 10 to 15 kt with gusts up 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.

$$


	

ANZ231 Cape Cod Bay

		
Expires:202509152100;;011261
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ231-152100-
Cape Cod Bay-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and N 1 foot at 2 seconds. Patchy fog this
morning with vsby 1 to 3 NM. 
.TONIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and N 1 foot at 3 seconds. Patchy fog after
midnight with vsby 1 NM or less. 
.TUE...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds and NE 1 foot at 3 seconds. 
.TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 8 seconds and E 1 foot at 2 seconds. 
.WED...SE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: E 1 foot at 2 seconds and E 1 foot
at 8 seconds, becoming SE 2 ft at 7 seconds and SE 1 foot at
3 seconds. 
.WED NIGHT...S winds 5 to 10 kt. Seas around 2 ft in the evening,
then 1 foot or less. Wave Detail: SE 2 ft at 7 seconds and SE
1 foot at 3 seconds, becoming SE 1 foot at 2 seconds and SE
1 foot at 7 seconds. A chance of showers after midnight. 
.THU...S winds 5 to 10 kt. Seas 1 foot or less. A chance of
showers. 
.THU NIGHT THROUGH FRI NIGHT...N winds 15 to 20 kt with gusts up
to 25 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.

$$


	        

ANZ232 Nantucket Sound

Expires:202509152100;;011265
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ232-152100-
Nantucket Sound-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds around 10 kt. Seas around 2 ft. Wave Detail: NE
1 foot at 2 seconds and NW 1 foot at 3 seconds. 
.TONIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
1 foot at 4 seconds and E 1 foot at 8 seconds. Patchy fog after
midnight with vsby 1 NM or less. 
.TUE...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: E
2 ft at 3 seconds and E 1 foot at 8 seconds. 
.TUE NIGHT...E winds around 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 8 seconds and E 1 foot at 3 seconds. 
.WED...E winds around 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds and E 1 foot at 3 seconds. 
.WED NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 7 seconds and E 1 foot at 3 seconds. A chance of
showers. 
.THU...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
.THU NIGHT THROUGH FRI NIGHT...N winds 15 to 20 kt with gusts up
to 25 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.

$$


	                	

ANZ233 Vinyard Sound

Expires:202509152100;;011266
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ233-152100-
Vineyard Sound-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE
1 foot at 2 seconds and W 1 foot at 3 seconds. 
.TONIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
1 foot at 3 seconds and S 1 foot at 6 seconds. Patchy fog after
midnight with vsby 1 NM or less. 
.TUE...E winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and NE 1 foot at 2 seconds. Patchy fog in the
morning with vsby 1 NM or less. 
.TUE NIGHT...E winds around 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 8 seconds and E 1 foot at 3 seconds. 
.WED...E winds around 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds and E 1 foot at 2 seconds. 
.WED NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 7 seconds and E 1 foot at 2 seconds. A chance of
showers. 
.THU...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
.THU NIGHT THROUGH FRI NIGHT...N winds 15 to 20 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.

$$


		                	

ANZ234 Buzzards Bay

Expires:202509152100;;011267
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ234-152100-
Buzzards Bay-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds 5 to 10 kt. Seas 1 foot or less, then around
2 ft this afternoon. Wave Detail: NE 1 foot at 2 seconds and NW
1 foot at 3 seconds, becoming NE 1 foot at 2 seconds and SE
1 foot at 8 seconds. 
.TONIGHT...E winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
E 1 foot at 2 seconds and SE 1 foot at 7 seconds. Patchy fog
after midnight with vsby 1 NM or less. 
.TUE...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft
at 8 seconds and NE 1 foot at 2 seconds. Patchy fog in the
morning with vsby 1 NM or less. 
.TUE NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 8 seconds and E 1 foot at 2 seconds. 
.WED...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft
at 7 seconds and E 1 foot at 2 seconds. 
.WED NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 6 seconds and E 1 foot at 2 seconds. A chance of
showers. 
.THU...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
.THU NIGHT THROUGH FRI NIGHT...N winds 15 to 20 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.

$$


		              	

ANZ235 Rhode Island Sound

Expires:202509152100;;011268
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ235-152100-
Rhode Island Sound-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds around 10 kt. Seas around 2 ft. Wave Detail: NE
2 ft at 3 seconds and SE 2 ft at 7 seconds. Patchy fog this
morning with vsby 1 NM or less. 
.TONIGHT...E winds around 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 4 seconds and SE 2 ft at 7 seconds. Patchy fog after
midnight with vsby 1 NM or less. 
.TUE...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and E 1 foot at 4 seconds. Patchy fog in the morning
with vsby 1 NM or less. 
.TUE NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds and NE 1 foot at 3 seconds. 
.WED AND WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 7 seconds. A chance of showers. 
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 7 seconds. A chance of showers. 
.THU NIGHT THROUGH FRI NIGHT...N winds 15 to 20 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.

$$


		

ANZ236 Narragansett Bay

Expires:202509152100;;011271
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ236-152100-
Narragansett Bay-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds 5 to 10 kt, becoming E this afternoon. Waves
around 2 ft. Patchy fog this morning with vsby 1 NM or less. 
.TONIGHT...NE winds 5 to 10 kt. Waves around 2 ft. 
.TUE...NE winds 5 to 10 kt, becoming E in the afternoon. Waves
around 2 ft. 
.TUE NIGHT...E winds 5 to 10 kt. Waves around 2 ft. 
.WED...E winds 5 to 10 kt, becoming SE in the afternoon. Waves
around 2 ft. 
.WED NIGHT...SE winds 5 to 10 kt. Waves around 2 ft. A chance of
showers. 
.THU...SE winds 5 to 10 kt. Waves around 2 ft. A chance of
showers. 
.THU NIGHT THROUGH FRI NIGHT...N winds 10 to 15 kt with gusts up
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.

$$

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

You can follow us on Facebook at
www.facebook.com/NWSBoston

You can follow us on Twitter at
@NWSBoston

			

ANZ237 Block Island Sound

Expires:202509152100;;011269
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ237-152100-
Block Island Sound-
404 AM EDT Mon Sep 15 2025

.TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 4 seconds and SE 2 ft at 7 seconds. Patchy fog this morning
with vsby 1 to 3 NM. 
.TONIGHT...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 4 seconds and SE 2 ft at 7 seconds. 
.TUE...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and SE 1 foot at 5 seconds. 
.TUE NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds and E 1 foot at 3 seconds. 
.WED AND WED NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 8 seconds and S 1 foot at 7 seconds. A chance
of showers. 
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds. A chance of showers. 
.THU NIGHT THROUGH FRI NIGHT...N winds 15 to 20 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.

$$


			

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

Expires:202509152100;;011259
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ250-152100-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft
at 3 seconds and SE 2 ft at 8 seconds. Patchy fog. Vsby 1 NM or
less, increasing to 1 to 3 NM this afternoon. 
.TONIGHT...E winds around 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds and NE 2 ft at 4 seconds. Patchy fog after
midnight with vsby 1 NM or less. 
.TUE...E winds around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds and NE 1 foot at 4 seconds. 
.TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 8 seconds. 
.WED AND WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 2 ft at 8 seconds and SE 1 foot at 2 seconds. 
.THU THROUGH FRI...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 2 ft at
8 seconds. 
.FRI NIGHT...N 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.

$$


	

ANZ251 Massachusetts Bay and Ipswich Bay

Expires:202509152100;;011260
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ251-152100-
Massachusetts Bay and Ipswich Bay-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N
2 ft at 3 seconds and E 2 ft at 9 seconds. Patchy fog this
morning with vsby 1 to 3 NM. 
.TONIGHT...E winds 5 to 10 kt, becoming NE after midnight. Seas
around 2 ft. Wave Detail: NE 2 ft at 4 seconds and E 2 ft at
8 seconds. Patchy fog after midnight with vsby 1 NM or less. 
.TUE...NE winds around 5 kt, becoming E in the afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 8 seconds and NE 1 foot at
3 seconds. Patchy fog in the morning with vsby 1 NM or less. 
.TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and E 1 foot at 3 seconds. 
.WED...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds and SE 1 foot at 3 seconds. 
.WED NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 3 seconds and E 2 ft at 7 seconds. 
.THU THROUGH FRI NIGHT...N winds 15 to 20 kt with gusts up to
25 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.

$$


		

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

 
Expires:202509152100;;011262
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ254-152100-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds and NE 1 foot at 2 seconds. Patchy fog. Vsby
1 to 3 NM. 
.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 8 seconds and NE 1 foot at 4 seconds. Patchy fog after
midnight. 
.TUE...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds and NE 1 foot at 4 seconds. 
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds and NE 1 foot at 3 seconds. 
.WED...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds. 
.WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds and S 1 foot at 4 seconds. A chance of showers
after midnight. 
.THU...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
.THU NIGHT AND FRI...SW winds around 10 kt, becoming NW. Seas
2 to 3 ft. 
.FRI NIGHT...N 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.

$$


		

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

Expires:202509152100;;011263
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ255-152100-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: NE
2 ft at 3 seconds and SE 2 ft at 8 seconds. 
.TONIGHT...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds and NE 2 ft at 3 seconds. Patchy fog after
midnight with vsby 1 to 3 NM. 
.TUE...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds and NE 2 ft at 4 seconds. 
.TUE NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds and NE 1 foot at 3 seconds. 
.WED AND WED NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 7 seconds. A chance of showers. 
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 7 seconds. A chance of showers. 
.THU NIGHT THROUGH FRI NIGHT...N 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.

$$


		

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

Expires:202509152100;;011264
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ256-152100-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NE
2 ft at 3 seconds and SE 2 ft at 8 seconds. 
.TONIGHT...E winds 10 to 15 kt. Seas around 3 ft. Wave Detail: SE
3 ft at 7 seconds and E 2 ft at 4 seconds. Patchy fog after
midnight with vsby 1 NM or less. 
.TUE...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: E 4 ft at 9 seconds and NE 1 foot at
3 seconds. Patchy fog in the morning with vsby 1 NM or less. 
.TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds. 
.WED AND WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds and S 1 foot at
7 seconds. A chance of showers. 
.THU...SE winds around 10 kt. Seas around 3 ft. Wave Detail: SE
3 ft at 7 seconds. A chance of showers. 
.THU NIGHT THROUGH FRI NIGHT...N 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.

$$


		

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

 
Expires:202509152100;;011270
FZUS51 KBOX 150805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Mon Sep 15 2025

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


ANZ230-152100-
Boston Harbor-
404 AM EDT Mon Sep 15 2025

.TODAY...NE winds 5 to 10 kt. Waves 1 foot or less. 
.TONIGHT...E winds 5 to 10 kt, becoming N after midnight. Waves
1 foot or less. Patchy fog after midnight with vsby 1 NM or less.
.TUE...NE winds around 5 kt, becoming E in the afternoon. Waves
1 foot or less. Patchy fog. Vsby 1 to 3 NM in the morning. 
.TUE NIGHT...SE winds 5 to 10 kt, becoming S after midnight.
Waves 1 foot or less. 
.WED...SE winds 5 to 10 kt. Waves 1 foot or less.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. 
.THU THROUGH FRI NIGHT...N winds 10 to 15 kt with gusts up 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.

$$