ANZ230 Boston Harbor

Expires:202608191800;;971731
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ230-191800-
Boston Harbor-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...S winds around 5 kt. Waves 1 foot or less.
Patchy fog. Vsby 1 to 3 NM. 
.WED...S winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less. Patchy fog in the morning with vsby 1 to 3 NM. 
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 
.THU...W winds around 5 kt, becoming NE in the afternoon. Waves
1 foot or less. 
.THU NIGHT...SE winds around 5 kt, becoming NW after midnight.
Waves 1 foot or less. 
.FRI AND FRI NIGHT...NE winds 5 to 10 kt. Waves 1 foot or less. 
.SAT AND SAT NIGHT...NE winds 5 to 10 kt. Waves around 2 ft, then
1 foot or less. A chance of showers. 
.SUN AND SUN NIGHT...E winds 5 to 10 kt, becoming SW. Waves
1 foot or less. 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.

$$


	

ANZ231 Cape Cod Bay

		
Expires:202608191800;;971722
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ231-191800-
Cape Cod Bay-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...SW winds around 5 kt. Seas around 2 ft. Wave
Detail: W 1 foot at 3 seconds and NE 1 foot at 3 seconds. Patchy
fog. Vsby 1 to 3 NM. 
.WED...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 3 seconds and NE 1 foot at 3 seconds. Patchy fog in the
morning with vsby 1 to 3 NM. 
.WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft in the
evening, then 1 foot or less. Wave Detail: SW 1 foot at 2 seconds
and E 1 foot at 4 seconds, becoming SW 1 foot at 2 seconds and E
1 foot at 6 seconds. 
.THU...W winds around 5 kt, becoming NE in the afternoon. Seas
1 foot or less. Wave Detail: SW 1 foot at 2 seconds and E 1 foot
at 7 seconds. 
.THU NIGHT...S winds around 5 kt, becoming W after midnight. Seas
1 foot or less. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot
at 4 seconds. 
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: NW 1 foot at 2 seconds and E 1 foot at 8 seconds. 
.SAT...E winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
.SAT NIGHT AND SUN...E winds 5 to 10 kt. Seas 1 foot or less,
then around 2 ft. Showers likely. 
.SUN NIGHT...SW 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.

$$


	        

ANZ232 Nantucket Sound

Expires:202608191800;;971726
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ232-191800-
Nantucket Sound-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: NE 1 foot at 4 seconds and SW 1 foot at 6 seconds. Patchy
fog. Vsby 1 to 3 NM. 
.WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and
SW 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 to
3 NM. 
.WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 3 seconds and E 1 foot at 6 seconds. Patchy fog
after midnight with vsby 1 NM or less. 
.THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 3 seconds and E 1 foot at 7 seconds. Patchy fog in the
morning with vsby 1 NM or less. 
.THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and NE
1 foot at 3 seconds. 
.FRI...NE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: NW 1 foot at 4 seconds and E
1 foot at 8 seconds, becoming NE 1 foot at 2 seconds and W 1 foot
at 4 seconds. 
.FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft in the evening,
then 1 foot or less. A chance of showers after midnight. 
.SAT...E winds 10 to 15 kt. Seas around 2 ft. A chance of
showers. 
.SAT NIGHT...SE winds 10 to 15 kt. Seas around 2 ft. Showers
likely. 
.SUN...SE winds 10 to 15 kt. Seas around 2 ft. Showers likely. 
.SUN NIGHT...SW 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.

$$


	                	

ANZ233 Vinyard Sound

Expires:202608191800;;971727
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ233-191800-
Vineyard Sound-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 6 seconds and E 1 foot at 4 seconds. Patchy
fog. 
.WED...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 6 seconds and E 1 foot at 4 seconds. 
.WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 5 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to
1 NM or less after midnight. 
.THU...SW winds 5 to 10 kt. Seas around 2 ft in the morning, then
1 foot or less. Wave Detail: SW 1 foot at 4 seconds and E 1 foot
at 6 seconds, becoming SW 1 foot at 4 seconds and E 1 foot at
7 seconds. Patchy fog in the morning with vsby 1 to 3 NM. 
.THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft in the evening, then 1 foot or less. Wave Detail: S
1 foot at 6 seconds and NE 1 foot at 10 seconds, becoming SW
1 foot at 5 seconds and NE 1 foot at 7 seconds. 
.FRI...NE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW
1 foot at 4 seconds and SE 1 foot at 8 seconds. 
.FRI NIGHT...E winds 5 to 10 kt. Seas 1 foot or less. A chance of
showers after midnight. 
.SAT AND SAT NIGHT...E winds 10 to 15 kt, diminishing to 5 to
10 kt. Seas around 2 ft. Showers likely.
.SUN...SE winds 5 to 10 kt. Seas around 2 ft. Showers likely. 
.SUN NIGHT...SW winds around 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.

$$


		                	

ANZ234 Buzzards Bay

Expires:202608191800;;971728
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ234-191800-
Buzzards Bay-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 1 foot at 4 seconds and E 1 foot at 4 seconds. Patchy
fog. Vsby 1 to 3 NM. 
.WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: S
2 ft at 7 seconds and SW 1 foot at 4 seconds. Patchy fog in the
morning. 
.WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at
7 seconds and SW 1 foot at 3 seconds. Patchy fog. Vsby 1 to 3 NM,
decreasing to 1 NM or less after midnight. 
.THU...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW
1 foot at 3 seconds and SE 1 foot at 7 seconds. Patchy fog in the
morning with vsby 1 to 3 NM. 
.THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas
1 foot or less. Wave Detail: SW 1 foot at 4 seconds and E 1 foot
at 7 seconds. 
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: NW 1 foot at 4 seconds and SE 1 foot at 8 seconds. 
.SAT AND SAT NIGHT...E winds 10 to 15 kt, diminishing to 5 to
10 kt. Seas around 2 ft. Showers likely.
.SUN...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Showers likely. 
.SUN NIGHT...SW winds 10 to 15 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.

$$


		              	

ANZ235 Rhode Island Sound

Expires:202608191800;;971729
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ235-191800-
Rhode Island Sound-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: S 3 ft at 6 seconds and E 1 foot at 4 seconds. Patchy
fog. 
.WED...SW winds around 5 kt, becoming S in the afternoon. Seas
2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at
4 seconds. 
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 3 seconds and SE 2 ft at 6 seconds. Patchy fog after
midnight with vsby 1 NM or less. 
.THU...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft
at 7 seconds and SW 1 foot at 4 seconds. Patchy fog in the
morning with vsby 1 NM or less. 
.THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at
4 seconds. 
.FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas
around 2 ft. Wave Detail: NW 1 foot at 3 seconds and SE 1 foot at
8 seconds. 
.FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. A chance of
showers after midnight. 
.SAT...E winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. 
.SAT NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. Showers
likely. 
.SUN...SE winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely. 
.SUN NIGHT...SW 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.

$$


		

ANZ236 Narragansett Bay

Expires:202608191800;;971732
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ236-191800-
Narragansett Bay-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...SW winds around 5 kt. Waves around 2 ft.
Patchy fog. Vsby 1 to 3 NM. 
.WED...SW winds around 5 kt, becoming S in the afternoon. Waves
around 2 ft. Patchy fog in the morning with vsby 1 to 3 NM. 
.WED NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Patchy fog
after midnight with vsby 1 to 3 NM. 
.THU...W winds 5 to 10 kt. Waves around 2 ft in the morning, then
1 foot or less. Patchy fog in the morning with vsby 1 to 3 NM. 
.THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight.
Waves 1 foot or less. 
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Waves 1 foot or less. 
.SAT...E winds 5 to 10 kt. Waves around 2 ft. A chance of
showers. 
.SAT NIGHT...NE winds 5 to 10 kt. Waves around 2 ft. Showers
likely. 
.SUN AND SUN NIGHT...SE winds 5 to 10 kt, becoming SW. 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.

$$


			

ANZ237 Block Island Sound

Expires:202608191800;;971730
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ237-191800-
Block Island Sound-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 7 seconds and SE 1 foot at 4 seconds. 
.WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 7 seconds and E 1 foot at 4 seconds. 
.WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 6 seconds and E 1 foot at 6 seconds. Patchy fog after
midnight with vsby 1 to 3 NM. 
.THU...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft
at 7 seconds and SW 1 foot at 4 seconds. Patchy fog in the
morning with vsby 1 NM or less. 
.THU NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at
4 seconds. 
.FRI...NE winds 5 to 10 kt, becoming E in the afternoon. Seas
around 2 ft. Wave Detail: NE 1 foot at 2 seconds and W 1 foot at
4 seconds. 
.FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. A chance of
showers after midnight. 
.SAT...E winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. 
.SAT NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely.
.SUN AND SUN NIGHT...SE winds 5 to 10 kt, becoming SW. 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.

$$


			

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

Expires:202608191800;;971720
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ250-191800-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 8 seconds and NE 1 foot at 4 seconds. Patchy
fog. Vsby 1 NM or less. 
.WED...S winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 7 seconds and W
1 foot at 2 seconds. Patchy fog in the morning with vsby 1 NM or
less. 
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 7 seconds and S 1 foot at 3 seconds. 
.THU...W winds around 5 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at
3 seconds. 
.THU NIGHT...S winds around 5 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot
at 2 seconds. 
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 8 seconds and N 1 foot at 2 seconds. 
.SAT THROUGH SUN...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance
of showers. 
.SUN NIGHT...SW winds 5 to 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.

$$


	

ANZ251 Massachusetts Bay and Ipswich Bay

Expires:202608191800;;971721
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ251-191800-
Massachusetts Bay and Ipswich Bay-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...SW winds around 5 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 9 seconds and NW 1 foot at 3 seconds. Patchy
fog. Vsby 1 to 3 NM. 
.WED...S winds around 5 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 9 seconds and E 1 foot at
6 seconds. Patchy fog in the morning with vsby 1 to 3 NM. 
.WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 7 seconds and S 1 foot at 3 seconds. 
.THU...W winds around 5 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at
2 seconds. 
.THU NIGHT...S winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft. Wave Detail: E 2 ft at 8 seconds and SW 1 foot at
3 seconds. 
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 8 seconds and N 1 foot at 2 seconds. 
.SAT AND SAT NIGHT...E winds 5 to 10 kt. Seas around 2 ft. A
chance of showers. 
.SUN AND SUN NIGHT...E winds 5 to 10 kt, becoming SW. 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.

$$


		

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

 
Expires:202608191800;;971723
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ254-191800-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 NM-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...W winds around 5 kt. Seas 3 to 4 ft. Wave
Detail: SE 3 ft at 8 seconds and NE 1 foot at 4 seconds. Patchy
fog. Vsby 1 NM or less. 
.WED...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft
at 7 seconds and NE 1 foot at 4 seconds. Patchy fog in the
morning with vsby 1 NM or less. 
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds and E 1 foot at 3 seconds. Patchy fog after
midnight with vsby 1 NM or less. 
.THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 7 seconds and W 1 foot at 3 seconds. Patchy fog in the morning
with vsby 1 to 3 NM. 
.THU NIGHT...W winds around 5 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 7 seconds and W 1 foot at 3 seconds. A chance of
showers after midnight. 
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 8 seconds and W 1 foot at 3 seconds. 
.SAT AND SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Showers
likely. 
.SUN...SE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely. 
.SUN NIGHT...SW 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.

$$


		

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

Expires:202608191800;;971724
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ255-191800-
Coastal Waters extending out to 25 NM South of Marthas Vineyard
and Nantucket-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...W winds around 5 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 6 seconds and SW 3 ft at 8 seconds. Patchy
fog. Vsby 1 to 3 NM. 
.WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft
at 6 seconds and E 1 foot at 6 seconds. Patchy fog in the morning
with vsby 1 NM or less. 
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds. Patchy fog after midnight with vsby 1 NM or
less. 
.THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 6 seconds and E 1 foot at 6 seconds. Patchy fog in the morning
with vsby 1 to 3 NM. 
.THU NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 7 seconds and SW 1 foot at 4 seconds. A chance of
showers. 
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 8 seconds and W 1 foot at 4 seconds. A chance
of showers through the day. A chance of showers after midnight. 
.SAT AND SAT NIGHT...E winds 10 to 15 kt, becoming SE 5 to 10 kt.
Seas 2 to 3 ft. Showers likely. 
.SUN...S winds around 10 kt. Seas 2 to 4 ft. Showers likely. 
.SUN NIGHT...SW 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.

$$


		

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

Expires:202608191800;;971725
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ256-191800-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 NM South of Block Island-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...SW winds 5 to 10 kt. Seas around 3 ft. Wave
Detail: S 3 ft at 7 seconds and E 1 foot at 3 seconds. Patchy
fog. Vsby 1 to 3 NM. 
.WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 6 seconds and SW 2 ft at 8 seconds. 
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds. Patchy fog after midnight with vsby 1 NM or
less. 
.THU...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft
at 8 seconds and W 1 foot at 4 seconds. Patchy fog in the morning
with vsby 1 to 3 NM. 
.THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at
4 seconds. 
.FRI...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and N 1 foot at 4 seconds. 
.FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. A chance of
showers after midnight. 
.SAT AND SAT NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt. Seas
2 to 3 ft. Showers likely. 
.SUN...SE winds 10 to 15 kt. Seas 2 to 4 ft. Showers likely. 
.SUN NIGHT...SW 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.

$$


		

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:202608191800;;971731
FZUS51 KBOX 190504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EDT Wed Aug 19 2026

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


ANZ230-191800-
Boston Harbor-
104 AM EDT Wed Aug 19 2026

.REST OF TONIGHT...S winds around 5 kt. Waves 1 foot or less.
Patchy fog. Vsby 1 to 3 NM. 
.WED...S winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less. Patchy fog in the morning with vsby 1 to 3 NM. 
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 
.THU...W winds around 5 kt, becoming NE in the afternoon. Waves
1 foot or less. 
.THU NIGHT...SE winds around 5 kt, becoming NW after midnight.
Waves 1 foot or less. 
.FRI AND FRI NIGHT...NE winds 5 to 10 kt. Waves 1 foot or less. 
.SAT AND SAT NIGHT...NE winds 5 to 10 kt. Waves around 2 ft, then
1 foot or less. A chance of showers. 
.SUN AND SUN NIGHT...E winds 5 to 10 kt, becoming SW. Waves
1 foot or less. 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.

$$