Sandy Bay Weather Center
Weather Center


X

ANZ230 Boston Harbor

Expires:202611011500;;052590
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ230-011500-
Boston Harbor-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...NW winds 5 to 10 kt. Waves 1 foot or less.
.SUN...W winds 5 to 10 kt. Waves 1 foot or less. 
.SUN NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 
.MON...SW winds around 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon. 
.MON NIGHT THROUGH TUE NIGHT...SW winds 5 to 10 kt. Waves 1 foot
or less. 
.WED THROUGH THU...SW winds 5 to 10 kt. Waves around 2 ft. 
.THU NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.  

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:202611011500;;052581
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ231-011500-
Cape Cod Bay-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
N 2 ft at 6 seconds and SE 1 foot at 10 seconds. 
.SUN...W winds 5 to 10 kt. Seas around 2 ft in the morning, then
1 foot or less. Wave Detail: N 2 ft at 5 seconds and SE 1 foot at
10 seconds, becoming N 1 foot at 5 seconds and SE 1 foot at
9 seconds. 
.SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less, then around
2 ft after midnight. Wave Detail: W 1 foot at 3 seconds and N
1 foot at 4 seconds, becoming W 1 foot at 2 seconds and N 1 foot
at 4 seconds. 
.MON...SW winds around 10 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at
4 seconds. 
.MON NIGHT THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas around
2 ft. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at
3 seconds. 
.WED THROUGH THU...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 E 1 foot
at 3 seconds. 
.THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of
showers.  

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:202611011500;;052585
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ232-011500-
Nantucket Sound-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
NW 1 foot at 2 seconds and NE 1 foot at 3 seconds. 
.SUN...NW winds 5 to 10 kt, becoming W in the afternoon. Seas
around 2 ft. Wave Detail: NW 1 foot at 2 seconds and NE 1 foot at
5 seconds. 
.SUN NIGHT...W winds around 10 kt. Seas around 2 ft. Wave Detail:
W 1 foot at 3 seconds and NE 1 foot at 5 seconds. 
.MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: W 2 ft at 3 seconds and NE 1 foot at
4 seconds. 
.MON NIGHT THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and
NE 1 foot at 4 seconds. 
.WED THROUGH THU...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and E 1 foot at
3 seconds. 
.THU NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers.  

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:202611011500;;052586
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ233-011500-
Vineyard Sound-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: N 1 foot at 3 seconds and SE 1 foot at 8 seconds. 
.SUN...NW winds 5 to 10 kt, becoming W in the afternoon. Seas
1 foot or less. Wave Detail: N 1 foot at 3 seconds and SE 1 foot
at 8 seconds. 
.SUN NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 4 seconds and NE 1 foot at 5 seconds. 
.MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and NE 1 foot at
4 seconds. 
.MON NIGHT THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and
E 1 foot at 3 seconds. 
.WED THROUGH THU...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 S 3 ft at
10 seconds. 
.THU NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers.  

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:202611011500;;052587
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ234-011500-
Buzzards Bay-
1003 PM EDT Sat Oct 31 2026

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

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:202611011500;;052588
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ235-011500-
Rhode Island Sound-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...N winds 5 to 10 kt. Seas 1 foot or less, then around
2 ft. Wave Detail: NW 1 foot at 2 seconds and NE 1 foot at
2 seconds, becoming N 1 foot at 3 seconds and SE 1 foot at
9 seconds. 
.SUN...NW winds 5 to 10 kt, becoming W in the afternoon. Seas
around 2 ft. Wave Detail: W 2 ft at 3 seconds and NE 1 foot at
2 seconds. 
.SUN NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
W 2 ft at 3 seconds and NE 1 foot at 5 seconds. 
.MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at
5 seconds. 
.MON NIGHT THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E
1 foot at 3 seconds. 
.WED THROUGH THU...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave
Detail: S 3 ft at 5 seconds and S 3 ft at 12 seconds. 
.THU NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A chance of
showers.  

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:202611011500;;052591
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ236-011500-
Narragansett Bay-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...N winds around 5 kt. Waves 1 foot or less. 
.SUN...W winds 5 to 10 kt. Waves 1 foot or less. 
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 foot or less. 
.MON...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves around 2 ft. 
.MON NIGHT THROUGH TUE NIGHT...SW winds 5 to 10 kt. Waves around
2 ft. 
.WED AND WED NIGHT...S winds 5 to 10 kt. Waves around 2 ft. 
.THU AND THU NIGHT...S winds around 10 kt. Waves 2 to 3 ft. A
chance of showers.  

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:202611011500;;052589
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ237-011500-
Block Island Sound-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W
1 foot at 2 seconds and NE 1 foot at 3 seconds. 
.SUN...NW winds around 5 kt, becoming W in the afternoon. Seas
around 2 ft. Wave Detail: W 1 foot at 2 seconds and NE 1 foot at
2 seconds. 
.SUN NIGHT...W winds around 10 kt. Seas around 2 ft. Wave Detail:
NE 1 foot at 3 seconds and W 1 foot at 3 seconds. 
.MON...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and E 1 foot
at 7 seconds. 
.MON NIGHT THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and
E 1 foot at 3 seconds. 
.WED AND WED NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 3 seconds and SE 2 ft at 9 seconds. 
.THU...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. 
.THU NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. A chance of
showers.  

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:202611011500;;052579
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ250-011500-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: N
2 ft at 5 seconds and SE 1 foot at 9 seconds. 
.SUN...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft
at 4 seconds and SE 1 foot at 9 seconds. 
.SUN NIGHT...SW winds 5 to 10 kt, becoming W 10 to 15 kt after
midnight. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and
NE 1 foot at 4 seconds. 
.MON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 3 seconds and E 2 ft at 11 seconds. 
.MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 3 seconds and E 2 ft at 10 seconds. 
.TUE AND TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: W 2 ft at 3 seconds and SE 1 foot at 3 seconds. 
.WED THROUGH THU...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. 
.THU NIGHT...S winds around 10 kt. Seas 2 to 4 ft. A chance of
showers.  

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:202611011500;;052580
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ251-011500-
Massachusetts Bay and Ipswich Bay-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
NE 2 ft at 6 seconds and NW 1 foot at 3 seconds. 
.SUN...W winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N
1 foot at 4 seconds and SE 1 foot at 10 seconds. 
.SUN NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less, then
around 2 ft after midnight. Wave Detail: W 1 foot at 2 seconds
and NE 1 foot at 4 seconds. 
.MON...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 2 seconds and NE 1 foot at 3 seconds. 
.MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 3 seconds and E 1 foot at 3 seconds. 
.TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 1 foot at 3 seconds and E 1 foot at 4 seconds. 
.WED THROUGH THU...S winds 5 to 10 kt. Seas around 2 ft. 
.THU NIGHT...S winds around 10 kt. Seas 2 to 3 ft. A chance of
showers.  

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:202611011500;;052582
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ254-011500-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 NM-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: N
3 ft at 6 seconds and SE 1 foot at 9 seconds. 
.SUN...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft
at 6 seconds and SE 1 foot at 9 seconds. 
.SUN NIGHT...W winds around 10 kt. Seas around 2 ft. Wave Detail:
W 2 ft at 3 seconds and N 2 ft at 5 seconds. 
.MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 11 seconds.
.MON NIGHT THROUGH TUE NIGHT...S winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E
2 ft at 4 seconds. 
.WED THROUGH THU...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 3 ft at
10 seconds. 
.THU NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. A chance of
showers.  

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:202611011500;;052583
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ255-011500-
Coastal Waters extending out to 25 NM South of Marthas Vineyard
and Nantucket-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...NW winds around 5 kt, becoming N. Seas 2 to 3 ft.
Wave Detail: NE 2 ft at 5 seconds and W 1 foot at 4 seconds. 
.SUN...NW winds around 10 kt, becoming W in the afternoon. Seas
around 2 ft. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at
5 seconds. 
.SUN NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
W 2 ft at 4 seconds and NE 1 foot at 5 seconds. 
.MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: W 3 ft at 4 seconds and NE 1 foot at
5 seconds. 
.MON NIGHT THROUGH TUE NIGHT...S winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and NE
1 foot at 5 seconds. 
.WED AND WED NIGHT...S winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: SW 2 ft at 4 seconds and S 2 ft at 10 seconds. 
.THU...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. 
.THU NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. A chance of
showers.  

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:202611011500;;052584
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ256-011500-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 NM South of Block Island-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...N winds around 10 kt. Seas around 2 ft. Wave Detail:
N 2 ft at 4 seconds and SE 1 foot at 9 seconds. 
.SUN...NW winds 5 to 10 kt, becoming W in the afternoon. Seas
around 2 ft. Wave Detail: N 1 foot at 3 seconds and SE 1 foot at
9 seconds. 
.SUN NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
W 2 ft at 3 seconds and NE 1 foot at 5 seconds. 
.MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at
5 seconds. 
.MON NIGHT THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E
1 foot at 3 seconds. 
.WED THROUGH THU...S winds 10 to 15 kt. Seas 2 to 4 ft. Wave
Detail: S 4 ft at 6 seconds and S 4 ft at 11 seconds. 
.THU NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. A chance of
showers.  

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:202611011500;;052590
FZUS51 KBOX 010204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Sat Oct 31 2026

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


ANZ230-011500-
Boston Harbor-
1003 PM EDT Sat Oct 31 2026

.OVERNIGHT...NW winds 5 to 10 kt. Waves 1 foot or less.
.SUN...W winds 5 to 10 kt. Waves 1 foot or less. 
.SUN NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 
.MON...SW winds around 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon. 
.MON NIGHT THROUGH TUE NIGHT...SW winds 5 to 10 kt. Waves 1 foot
or less. 
.WED THROUGH THU...SW winds 5 to 10 kt. Waves around 2 ft. 
.THU NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.  

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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