Sandy Bay Weather Center
Weather Center


X

ANZ230 Boston Harbor

Expires:202609090600;;118492
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ230-090600-
Boston Harbor-
103 PM EDT Tue Sep 8 2026

.THIS AFTERNOON...E winds 5 to 10 kt. Waves 1 foot or less.
.TONIGHT...SE winds 5 to 10 kt, diminishing to around 5 kt after
midnight. Waves 1 foot or less. 
.WED...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft
in the afternoon. 
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
around 2 ft. A chance of showers after midnight. 
.THU...W winds 10 to 15 kt with gusts up to 25 kt. Waves around
2 ft. A chance of showers in the morning. 
.THU NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft in the evening, then 1 foot or less. 
.FRI THROUGH SAT NIGHT...S winds 5 to 10 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.

$$


	
X

ANZ231 Cape Cod Bay

		
Expires:202609090600;;118483
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ231-090600-
Cape Cod Bay-
103 PM EDT Tue Sep 8 2026

...GALE WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY
MORNING...

.THIS AFTERNOON...NE winds around 5 kt. Seas 1 foot or less. Wave
Detail: N 1 foot at 4 seconds and E 1 foot at 9 seconds. 
.TONIGHT...SE winds around 5 kt. Seas 1 foot or less. Wave
Detail: N 1 foot at 3 seconds and E 1 foot at 9 seconds. 
.WED...SE winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 1 foot or less, then 2 to 3 ft
in the afternoon. Wave Detail: SE 1 foot at 3 seconds and E
1 foot at 10 seconds, becoming E 1 foot at 3 seconds and S 1 foot
at 3 seconds. 
.WED NIGHT...SW winds 15 to 20 kt. Gusts up to 25 kt, increasing
to 35 kt after midnight. Seas 3 to 4 ft, building to 4 to 6 ft
after midnight. Wave Detail: S 2 ft at 3 seconds and E 1 foot at
4 seconds, becoming SW 3 ft at 4 seconds and E 1 foot at
4 seconds. 
.THU...SW winds 15 to 20 kt with gusts up to 35 kt, diminishing
to 10 to 15 kt with gusts up to 25 kt in the afternoon. Seas 3 to
5 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at
5 seconds. A chance of showers. 
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt,
becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: W 2 ft at 3 seconds and SE 1 foot at 5 seconds. 
.FRI THROUGH SAT NIGHT...S winds 5 to 10 kt with gusts up to
20 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:202609090600;;118487
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ232-090600-
Nantucket Sound-
103 PM EDT Tue Sep 8 2026

...GALE WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY
MORNING...

.THIS AFTERNOON...N winds around 5 kt. Seas around 2 ft. Wave
Detail: W 1 foot at 3 seconds and NE 1 foot at 5 seconds. 
.TONIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
NE 1 foot at 4 seconds and SW 1 foot at 4 seconds. 
.WED...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SE 2 ft at 3 seconds and E 1 foot at
10 seconds. 
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt,
increasing to 20 to 25 kt with gusts up to 35 kt after midnight.
Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 1 foot at
4 seconds. 
.THU...SW winds 15 to 20 kt with gusts up to 35 kt. Seas 3 to
5 ft. Wave Detail: SW 4 ft at 5 seconds and E 1 foot at
5 seconds. A chance of showers. 
.THU NIGHT...W winds 10 to 15 kt. Gusts up to 30 kt in the
evening. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and S
1 foot at 8 seconds. A chance of showers. 
.FRI THROUGH SAT NIGHT...S winds 10 to 15 kt with gusts up 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.

$$


	                	
X

ANZ233 Vinyard Sound

Expires:202609090600;;118488
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ233-090600-
Vineyard Sound-
103 PM EDT Tue Sep 8 2026

...GALE WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY
MORNING...

.THIS AFTERNOON...SW winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 4 seconds and N 1 foot at 4 seconds. 
.TONIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
NE 1 foot at 4 seconds and SW 1 foot at 4 seconds. 
.WED...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 25 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft
in the afternoon. Wave Detail: E 1 foot at 3 seconds and SW
1 foot at 4 seconds, becoming SW 2 ft at 4 seconds and E 1 foot
at 2 seconds. 
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt,
increasing to 20 to 25 kt with gusts up to 35 kt after midnight.
Seas 3 to 4 ft, building to 4 to 6 ft after midnight. Wave
Detail: SW 4 ft at 5 seconds and E 1 foot at 4 seconds, becoming
SW 6 ft at 6 seconds and SE 1 foot at 4 seconds. 
.THU...SW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Seas 4 to 6 ft. Wave Detail: SW
6 ft at 8 seconds and SE 4 ft at 6 seconds. A chance of showers. 
.THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming
NW around 10 kt after midnight. Seas 3 to 5 ft, subsiding to 2 to
3 ft after midnight. Wave Detail: SW 5 ft at 8 seconds and SE
2 ft at 14 seconds, becoming SW 3 ft at 7 seconds and SE 1 foot
at 13 seconds. A chance of showers. 
.FRI THROUGH SAT NIGHT...S 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:202609090600;;118489
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ234-090600-
Buzzards Bay-
103 PM EDT Tue Sep 8 2026

...GALE WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY
MORNING...

.THIS AFTERNOON...SW winds around 5 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 4 seconds and N 1 foot at 4 seconds. 
.TONIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
NE 1 foot at 4 seconds and SW 1 foot at 4 seconds. 
.WED...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 25 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft
in the afternoon. Wave Detail: SE 1 foot at 4 seconds and SE
1 foot at 9 seconds, becoming SW 2 ft at 3 seconds and E 1 foot
at 2 seconds. 
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt,
increasing to 20 to 25 kt with gusts up to 35 kt after midnight.
Seas 3 to 4 ft, building to 4 to 6 ft after midnight. Wave
Detail: SW 3 ft at 4 seconds and E 1 foot at 4 seconds, becoming
SW 5 ft at 6 seconds and SE 2 ft at 10 seconds. 
.THU...SW winds 15 to 20 kt with gusts up to 35 kt. Seas 4 to
6 ft. Wave Detail: SW 5 ft at 7 seconds and SE 4 ft at 8 seconds.
A chance of showers.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 30 kt, becoming
NW after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at
8 seconds and SE 4 ft at 13 seconds. A chance of showers. 
.FRI THROUGH SAT NIGHT...S 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

ANZ235 Rhode Island Sound

Expires:202609090600;;118490
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ235-090600-
Rhode Island Sound-
103 PM EDT Tue Sep 8 2026

.THIS AFTERNOON...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 1 foot at 4 seconds and N 1 foot at 4 seconds. 
.TONIGHT...SW winds 5 to 10 kt, becoming SE after midnight. Seas
around 2 ft. Wave Detail: NE 1 foot at 4 seconds and SW 1 foot at
4 seconds. 
.WED...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 25 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft
in the afternoon. Wave Detail: NE 1 foot at 3 seconds and SW
1 foot at 4 seconds, becoming S 2 ft at 4 seconds and NE 1 foot
at 3 seconds. 
.WED NIGHT...SW winds 20 to 25 kt with gusts up to 35 kt. Seas
3 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: SW
4 ft at 5 seconds and E 1 foot at 4 seconds, becoming SW 6 ft at
7 seconds and SE 4 ft at 10 seconds. 
.THU...SW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Seas 5 to 7 ft. Wave Detail: SW
7 ft at 8 seconds and E 1 foot at 5 seconds. A chance of showers.
.THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming
NW around 10 kt after midnight. Seas 4 to 6 ft, subsiding to 3 to
4 ft after midnight. Wave Detail: SW 6 ft at 8 seconds and S 5 ft
at 10 seconds, becoming SW 4 ft at 7 seconds and SE 2 ft at
10 seconds. A chance of showers. 
.FRI THROUGH SAT NIGHT...S winds 10 to 15 kt with gusts up 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.

$$


		
X

ANZ236 Narragansett Bay

Expires:202609090600;;118493
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ236-090600-
Narragansett Bay-
103 PM EDT Tue Sep 8 2026

.THIS AFTERNOON...SW winds around 5 kt. Waves 1 foot or less. 
.TONIGHT...SE winds around 5 kt. Waves 1 foot or less. 
.WED...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 25 kt in the afternoon. Waves 1 foot or less, then 2 to
3 ft in the afternoon. 
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Waves
3 to 4 ft. 
.THU...SW winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Gusts up to 30 kt. Waves 2 to 4 ft. A chance of
showers. 
.THU NIGHT...W winds 5 to 10 kt with gusts up to 25 kt, becoming
NW after midnight. Waves 2 to 3 ft. 
.FRI THROUGH SAT NIGHT...S winds 5 to 10 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

ANZ237 Block Island Sound

Expires:202609090600;;118491
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ237-090600-
Block Island Sound-
103 PM EDT Tue Sep 8 2026

.THIS AFTERNOON...W winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: N 1 foot at 3 seconds and SW 1 foot at 3 seconds. 
.TONIGHT...SW winds 5 to 10 kt, becoming S after midnight. Seas
around 2 ft in the evening, then 1 foot or less. Wave Detail: SW
1 foot at 3 seconds and SE 1 foot at 9 seconds, becoming SW
1 foot at 3 seconds and N 1 foot at 4 seconds. 
.WED...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 25 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft
in the afternoon. Wave Detail: NE 1 foot at 3 seconds and S
1 foot at 3 seconds, becoming S 2 ft at 3 seconds and NE 1 foot
at 3 seconds. 
.WED NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas
3 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: SW
4 ft at 5 seconds and E 1 foot at 4 seconds, becoming SW 5 ft at
6 seconds and SE 1 foot at 4 seconds. 
.THU...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: SW 5 ft at 7 seconds and SE 4 ft at
10 seconds. A chance of showers. 
.THU NIGHT...W winds 10 to 15 kt with gusts up to 25 kt, becoming
NW 5 to 10 kt after midnight. Seas 3 to 5 ft. Wave Detail: S 4 ft
at 8 seconds and SW 3 ft at 7 seconds. A chance of showers. 
.FRI THROUGH SAT NIGHT...S 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

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

Expires:202609090600;;118481
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ250-090600-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
103 PM EDT Tue Sep 8 2026

.THIS AFTERNOON...NE winds around 5 kt. Seas around 2 ft. Wave
Detail: N 2 ft at 3 seconds and E 1 foot at 9 seconds. 
.TONIGHT...SE winds around 5 kt. Seas around 2 ft. Wave Detail: W
1 foot at 3 seconds and N 1 foot at 3 seconds. 
.WED...SE winds 10 to 15 kt, becoming S 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 4 seconds and E 1 foot at 9 seconds. 
.WED NIGHT...S winds 15 to 20 kt with gusts up to 25 kt, becoming
SW 20 to 25 kt with gusts up to 35 kt after midnight. Seas 3 to
5 ft. Wave Detail: SE 5 ft at 5 seconds and E 1 foot at
9 seconds. A chance of showers after midnight. 
.THU...SW winds 20 to 25 kt, diminishing to 10 to 15 kt in the
afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SW
5 ft at 5 seconds and SE 2 ft at 9 seconds. A chance of showers
in the morning. 
.THU NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at
9 seconds. 
.FRI THROUGH SAT NIGHT...S winds 10 to 15 kt with gusts up 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.

$$


	
X

ANZ251 Massachusetts Bay and Ipswich Bay

Expires:202609090600;;118482
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ251-090600-
Massachusetts Bay and Ipswich Bay-
103 PM EDT Tue Sep 8 2026

.THIS AFTERNOON...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: W 1 foot at 2 seconds and NE 1 foot at 3 seconds. 
.TONIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
NE 1 foot at 2 seconds and SW 1 foot at 2 seconds. 
.WED...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 25 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft in
the afternoon. Wave Detail: SE 1 foot at 3 seconds and E 1 foot
at 9 seconds, becoming SE 2 ft at 4 seconds and E 1 foot at
9 seconds. 
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas
around 3 ft. Wave Detail: SE 3 ft at 5 seconds and E 1 foot at
9 seconds. A chance of showers after midnight. 
.THU...SW winds 10 to 15 kt. Gusts up to 30 kt, decreasing to
20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at
4 seconds and SE 1 foot at 5 seconds. A chance of showers in the
morning. 
.THU NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE
1 foot at 5 seconds. 
.FRI THROUGH SAT NIGHT...S winds 5 to 10 kt with gusts up to
20 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

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

 
Expires:202609090600;;118484
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ254-090600-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 NM-
103 PM EDT Tue Sep 8 2026

.THIS AFTERNOON...N winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: N 2 ft at 4 seconds and E 2 ft at 10 seconds. 
.TONIGHT...E winds around 5 kt, becoming SE after midnight. Seas
around 2 ft. Wave Detail: NW 1 foot at 4 seconds and E 1 foot at
9 seconds. 
.WED...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: S 2 ft at 3 seconds and NE 1 foot at
3 seconds. 
.WED NIGHT...S winds 15 to 20 kt, becoming SW 20 to 25 kt after
midnight. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft
at 5 seconds and NE 1 foot at 4 seconds. 
.THU...SW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SW
5 ft at 6 seconds and SE 2 ft at 9 seconds. A chance of showers
in the morning. 
.THU NIGHT...SW winds 15 to 20 kt, becoming NW around 10 kt after
midnight. Gusts up to 25 kt. Seas 4 to 6 ft, subsiding to 2 to
4 ft after midnight. Wave Detail: SW 4 ft at 6 seconds and SE
2 ft at 9 seconds, becoming W 3 ft at 6 seconds and SE 2 ft at
9 seconds. A chance of showers. 
.FRI AND FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
becoming W around 5 kt. Seas 2 to 4 ft. 
.SAT AND SAT NIGHT...SE winds 5 to 10 kt, becoming S. 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

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

Expires:202609090600;;118485
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ255-090600-
Coastal Waters extending out to 25 NM South of Marthas Vineyard
and Nantucket-
103 PM EDT Tue Sep 8 2026

.THIS AFTERNOON...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: W 2 ft at 4 seconds and NE 1 foot at 5 seconds. 
.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W
2 ft at 4 seconds and NE 1 foot at 4 seconds. 
.WED...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and E 1 foot at
3 seconds. 
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt,
increasing to 20 to 25 kt with gusts up to 35 kt after midnight.
Seas 3 to 4 ft, building to 4 to 6 ft after midnight. Wave
Detail: SW 4 ft at 5 seconds and NE 1 foot at 4 seconds, becoming
SW 6 ft at 7 seconds and E 1 foot at 4 seconds. 
.THU...SW winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to
8 ft. Wave Detail: SW 7 ft at 8 seconds and SE 6 ft at 9 seconds.
A chance of showers.
.THU NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt,
becoming W 10 to 15 kt with gusts up to 20 kt after midnight.
Seas 5 to 7 ft, subsiding to 3 to 5 ft after midnight. Wave
Detail: SW 7 ft at 8 seconds and SE 2 ft at 9 seconds, becoming
SW 5 ft at 7 seconds and SE 1 foot at 10 seconds. A chance of
showers. 
.FRI AND FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
becoming SE around 5 kt. Seas 2 to 4 ft. 
.SAT AND SAT NIGHT...SE 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

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

Expires:202609090600;;118486
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ256-090600-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 NM South of Block Island-
103 PM EDT Tue Sep 8 2026

.THIS AFTERNOON...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: W 2 ft at 4 seconds and N 1 foot at 4 seconds. 
.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 4 seconds and NE 1 foot at 5 seconds. 
.WED...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 25 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW
3 ft at 4 seconds and E 1 foot at 2 seconds. 
.WED NIGHT...SW winds 20 to 25 kt with gusts up to 35 kt. Seas
3 to 5 ft, building to 5 to 7 ft after midnight. Wave Detail: SW
5 ft at 5 seconds and E 1 foot at 4 seconds, becoming SW 7 ft at
7 seconds and E 1 foot at 4 seconds. 
.THU...SW winds 20 to 25 kt with gusts up to 35 kt. Seas 6 to
8 ft. Wave Detail: SW 8 ft at 8 seconds and SE 8 ft at 9 seconds.
A chance of showers.
.THU NIGHT...SW winds 15 to 20 kt, becoming NW 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 5 to 7 ft, subsiding to 4 to
5 ft after midnight. Wave Detail: SW 6 ft at 8 seconds and SE
3 ft at 10 seconds, becoming SW 5 ft at 7 seconds and NE 1 foot
at 4 seconds. A chance of showers. 
.FRI AND FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt,
becoming N 5 to 10 kt. Seas 2 to 4 ft. 
.SAT AND SAT NIGHT...E winds 5 to 10 kt, becoming S. 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

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:202609090600;;118492
FZUS51 KBOX 081704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Tue Sep 8 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ230-090600-
Boston Harbor-
103 PM EDT Tue Sep 8 2026

.THIS AFTERNOON...E winds 5 to 10 kt. Waves 1 foot or less.
.TONIGHT...SE winds 5 to 10 kt, diminishing to around 5 kt after
midnight. Waves 1 foot or less. 
.WED...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft
in the afternoon. 
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
around 2 ft. A chance of showers after midnight. 
.THU...W winds 10 to 15 kt with gusts up to 25 kt. Waves around
2 ft. A chance of showers in the morning. 
.THU NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft in the evening, then 1 foot or less. 
.FRI THROUGH SAT NIGHT...S winds 5 to 10 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.

$$


		


  • 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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