Sandy Bay Weather Center
Weather Center


X

ANZ230 Boston Harbor

Expires:202603032200;;545150
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ230-032200-
Boston Harbor-
406 AM EST Tue Mar 3 2026

.TODAY...S winds 5 to 10 kt. Waves around 2 ft. Snow, rain with a
slight chance of freezing rain this afternoon. 
.TONIGHT...SE winds 5 to 10 kt, becoming W after midnight. Waves
1 foot or less. Patchy fog. Rain. A chance of snow in the
evening. Vsby 1 to 3 NM. 
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Waves
1 foot or less. 
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 
.THU...NW winds around 5 kt, becoming NE in the afternoon. Waves
1 foot or less. A chance of rain. 
.THU NIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Waves 2 to 3 ft. A chance of rain in the evening,
then rain after midnight. 
.FRI...NE winds 15 to 20 kt. Waves 2 to 3 ft. Rain.
.FRI NIGHT AND SAT...E winds 10 to 15 kt, becoming S 15 to 20 kt.
Waves 2 to 3 ft. 
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
around 2 ft. A chance of rain.  

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:202603032200;;545141
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ231-032200-
Cape Cod Bay-
406 AM EST Tue Mar 3 2026

.TODAY...S winds 5 to 10 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: S 1 foot at 2 seconds and NE 1 foot at
5 seconds. Snow and rain this afternoon. 
.TONIGHT...SE winds 10 to 15 kt, becoming W after midnight. Gusts
up to 20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds
and SE 1 foot at 4 seconds. Patchy fog. Rain. Vsby 1 NM or less,
increasing to 1 to 3 NM after midnight. 
.WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and NW 1 foot at
2 seconds. Patchy fog in the morning with vsby 1 to 3 NM. 
.WED NIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 8 seconds and SW 1 foot at 2 seconds. 
.THU...SW winds around 5 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 9 seconds and NE 1 foot at
2 seconds. A chance of rain.
.THU NIGHT...NE winds 5 to 10 kt, becoming E 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: NE
2 ft at 3 seconds and SE 2 ft at 10 seconds. A chance of rain in
the evening, then rain after midnight. 
.FRI...NE winds 15 to 20 kt. Seas 2 to 4 ft. Rain.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 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
2 to 4 ft. A chance of rain.  

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:202603032200;;545145
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ232-032200-
Nantucket Sound-
406 AM EST Tue Mar 3 2026

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

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:202603032200;;545146
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ233-032200-
Vineyard Sound-
406 AM EST Tue Mar 3 2026

.TODAY...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
1 foot at 4 seconds and SE 1 foot at 8 seconds. Rain with snow
likely this afternoon. 
.TONIGHT...S winds 10 to 15 kt, becoming SW after midnight. Gusts
up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 8 seconds
and SE 2 ft at 5 seconds. Patchy fog. Rain. Vsby 1 NM or less,
increasing to 1 to 3 NM after midnight. 
.WED...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at
8 seconds and W 1 foot at 4 seconds. Patchy 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
3 ft at 8 seconds and SW 1 foot at 5 seconds. 
.THU...S winds around 5 kt, becoming E in the afternoon. Seas
around 2 ft. Wave Detail: S 2 ft at 8 seconds and E 1 foot at
2 seconds. A chance of rain. 
.THU NIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds
and SE 2 ft at 10 seconds. A chance of rain in the evening, then
rain after midnight. 
.FRI...NE winds 15 to 20 kt. Seas 2 to 3 ft. Rain.
.FRI NIGHT AND SAT...NE winds 10 to 15 kt, becoming S 15 to
20 kt. Seas 2 to 3 ft. 
.SAT NIGHT...SW winds 20 to 25 kt. Seas 3 to 4 ft. A chance of
rain.  

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:202603032200;;545147
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ234-032200-
Buzzards Bay-
406 AM EST Tue Mar 3 2026

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

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:202603032200;;545148
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ235-032200-
Rhode Island Sound-
406 AM EST Tue Mar 3 2026

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

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:202603032200;;545151
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ236-032200-
Narragansett Bay-
406 AM EST Tue Mar 3 2026

.TODAY...SE winds 5 to 10 kt. Waves around 2 ft. A chance of snow
this morning, then rain and snow this afternoon. Patchy fog this
afternoon with vsby 1 NM or less. 
.TONIGHT...S winds 5 to 10 kt, becoming W with gusts up to 20 kt
after midnight. Waves 2 to 3 ft. Patchy fog. Rain. Vsby 1 to
3 NM. 
.WED...NW winds around 5 kt, becoming SW around 5 kt in the
afternoon. Waves 2 to 3 ft. Patchy fog in the morning with vsby
1 to 3 NM. 
.WED NIGHT...SW winds around 5 kt. Waves 2 to 3 ft. 
.THU...NE winds around 5 kt, becoming E in the afternoon. Waves
around 2 ft. A chance of rain. 
.THU NIGHT...NE winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. Waves around 2 ft. Rain.
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft. Rain.
.FRI NIGHT AND SAT...NE winds 5 to 10 kt, becoming S 10 to 15 kt
with gusts up 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.  

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

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www.facebook.com/us.nationalweatherservice.boston.gov

You can follow us on Twitter at
@NWSBoston

			
X

ANZ237 Block Island Sound

Expires:202603032200;;545149
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ237-032200-
Block Island Sound-
406 AM EST Tue Mar 3 2026

.TODAY...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 4 seconds and SE 2 ft at 8 seconds. A chance of snow.
Rain this afternoon. Patchy fog this afternoon with vsby 1 NM or
less. 
.TONIGHT...S winds 10 to 15 kt, becoming W after midnight. Gusts
up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and
SE 2 ft at 5 seconds. Patchy fog. Rain. Vsby 1 to 3 NM. 
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds. Patchy fog in the
morning with vsby 1 to 3 NM. 
.WED NIGHT...SW winds around 5 kt. Seas 3 to 4 ft. Wave Detail:
SE 4 ft at 8 seconds. 
.THU...NE winds around 5 kt, becoming E in the afternoon. Seas
2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds. A chance of rain. 
.THU NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 4 ft. Wave Detail: E 3 ft at 4 seconds and SE
3 ft at 10 seconds. Rain.
.FRI...NE winds 15 to 20 kt. Seas 3 to 4 ft. Rain.
.FRI NIGHT AND SAT...NE winds 10 to 15 kt, becoming S. Gusts up
to 20 kt. Seas 3 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.  

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:202603032200;;545139
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ250-032200-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
406 AM EST Tue Mar 3 2026

.TODAY...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 9 seconds.
Snow and rain this afternoon. 
.TONIGHT...SE winds 10 to 15 kt, becoming W after midnight. Gusts
up to 20 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 5 seconds and
SE 3 ft at 9 seconds. Patchy fog. Rain. Snow in the evening. Vsby
1 NM or less, increasing to 1 to 3 NM after midnight. 
.WED...NW winds 10 to 15 kt with gusts up to 20 kt, becoming SW
5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SE 4 ft
at 8 seconds and W 2 ft at 3 seconds. Patchy fog in the morning
with vsby 1 to 3 NM. 
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE
4 ft at 9 seconds. 
.THU...W winds 5 to 10 kt, becoming NE in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and N 2 ft at
3 seconds. A chance of rain in the afternoon. 
.THU NIGHT...NE winds 10 to 15 kt, becoming E 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 2 to 4 ft, building to 4 to
6 ft after midnight. Wave Detail: NE 3 ft at 4 seconds and SE
3 ft at 11 seconds, becoming NE 5 ft at 5 seconds and SE 3 ft at
11 seconds. A chance of rain in the evening, then rain likely
after midnight. 
.FRI...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
8 ft. Rain likely. 
.FRI NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
7 to 9 ft. 
.SAT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
8 ft. 
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft. A chance of rain.  

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:202603032200;;545140
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ251-032200-
Massachusetts Bay and Ipswich Bay-
406 AM EST Tue Mar 3 2026

.TODAY...S winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: S 2 ft at 3 seconds and E 2 ft at 8 seconds.
Snow with a slight chance of freezing rain this afternoon. 
.TONIGHT...SE winds 5 to 10 kt, becoming W after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 foot at
9 seconds. Patchy fog. Rain. Snow in the evening. Vsby 1 NM or
less, increasing to 1 to 3 NM after midnight. 
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: E 2 ft at 6 seconds and E 2 ft at
9 seconds. Patchy fog in the morning with vsby 1 to 3 NM. 
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 10 seconds and SW 1 foot at 2 seconds. 
.THU...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 10 seconds and SW 1 foot at
2 seconds. A chance of rain. 
.THU NIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Seas 2 to 4 ft. Wave Detail: NE 4 ft at 5 seconds
and SE 2 ft at 11 seconds. A chance of rain in the evening, then
rain after midnight. 
.FRI...NE winds 15 to 20 kt. Seas 4 to 6 ft. Rain likely. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.SAT...S winds 10 to 15 kt with gusts up to 20 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.  

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:202603032200;;545142
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ254-032200-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
406 AM EST Tue Mar 3 2026

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

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

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:202603032200;;545143
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ255-032200-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
406 AM EST Tue Mar 3 2026

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

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

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:202603032200;;545144
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ256-032200-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
406 AM EST Tue Mar 3 2026

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

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

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:202603032200;;545150
FZUS51 KBOX 030906
CWFBOX

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

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


ANZ230-032200-
Boston Harbor-
406 AM EST Tue Mar 3 2026

.TODAY...S winds 5 to 10 kt. Waves around 2 ft. Snow, rain with a
slight chance of freezing rain this afternoon. 
.TONIGHT...SE winds 5 to 10 kt, becoming W after midnight. Waves
1 foot or less. Patchy fog. Rain. A chance of snow in the
evening. Vsby 1 to 3 NM. 
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Waves
1 foot or less. 
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 
.THU...NW winds around 5 kt, becoming NE in the afternoon. Waves
1 foot or less. A chance of rain. 
.THU NIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Waves 2 to 3 ft. A chance of rain in the evening,
then rain after midnight. 
.FRI...NE winds 15 to 20 kt. Waves 2 to 3 ft. Rain.
.FRI NIGHT AND SAT...E winds 10 to 15 kt, becoming S 15 to 20 kt.
Waves 2 to 3 ft. 
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
around 2 ft. A chance of rain.  

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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