Sandy Bay Weather Center
Weather Center


X

ANZ230 Boston Harbor

Expires:202507160900;;498856
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ230-160900-
Boston Harbor-
404 PM EDT Tue Jul 15 2025

.TONIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 
.WED...S winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less, then around 2 ft in the afternoon. 
.WED NIGHT...S winds around 10 kt. Waves around 2 ft in the
evening, then 1 foot or less. 
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves around 2 ft. A chance of showers. A chance of tstms in the
afternoon. 
.THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft. A chance of showers and tstms in the
evening. 
.FRI AND FRI NIGHT...N winds 5 to 10 kt. Waves around 2 ft. 
.SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming S. Waves
1 foot or less. 
.SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft. A chance of showers.  

Winds and waves higher in and near tstms.

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:202507160900;;498847
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ231-160900-
Cape Cod Bay-
404 PM EDT Tue Jul 15 2025

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

ANZ232 Nantucket Sound

Expires:202507160900;;498851
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ232-160900-
Nantucket Sound-
404 PM EDT Tue Jul 15 2025

.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft this evening,
then 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and E
1 foot at 6 seconds, becoming SW 1 foot at 3 seconds and SE
1 foot at 6 seconds. Patchy fog. Vsby 1 NM or less. 
.WED...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: SW 1 foot at 3 seconds and E
1 foot at 6 seconds. Patchy fog in the morning with vsby 1 NM or
less. 
.WED NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 3 seconds and E 1 foot at 6 seconds. Patchy fog. Vsby
1 to 3 NM. 
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW
3 ft at 4 seconds and SE 1 foot at 6 seconds. Patchy fog in the
morning with vsby 1 to 3 NM. 
.THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at
9 seconds. 
.FRI AND FRI NIGHT...N 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 2 ft at
4 seconds. 
.SAT AND SAT NIGHT...NE winds around 10 kt, becoming S. Seas
around 2 ft. 
.SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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:202507160900;;498852
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ233-160900-
Vineyard Sound-
404 PM EDT Tue Jul 15 2025

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

ANZ234 Buzzards Bay

Expires:202507160900;;498853
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ234-160900-
Buzzards Bay-
404 PM EDT Tue Jul 15 2025

.TONIGHT...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.
Vsby 1 NM or less. 
.WED...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: SW 1 foot at 3 seconds and SE
1 foot at 7 seconds. Patchy fog in the morning with vsby 1 NM or
less. 
.WED NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 3 seconds and SE 1 foot at 7 seconds. Patchy fog. Vsby
1 to 3 NM. 
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW
3 ft at 4 seconds and E 1 foot at 8 seconds. A chance of showers.
Patchy fog in the morning with vsby 1 to 3 NM. 
.THU NIGHT AND FRI...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at
10 seconds. 
.FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 7 seconds and NE 1 foot at 6 seconds. 
.SAT AND SAT NIGHT...E winds around 10 kt, becoming S. Seas
around 2 ft. 
.SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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:202507160900;;498854
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ235-160900-
Rhode Island Sound-
404 PM EDT Tue Jul 15 2025

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

ANZ236 Narragansett Bay

Expires:202507160900;;498857
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ236-160900-
Narragansett Bay-
404 PM EDT Tue Jul 15 2025

.TONIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. Patchy fog
after midnight with vsby 1 NM or less. 
.WED...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon. Patchy fog in the morning with vsby 1 NM or
less. 
.WED NIGHT...SW winds around 10 kt. Waves around 2 ft. Patchy
fog. Vsby 1 to 3 NM. 
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft. A chance of showers and tstms. 
.THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Waves 2 to 3 ft. A chance of showers in the evening. 
.FRI AND FRI NIGHT...N winds 5 to 10 kt. Waves 2 to 3 ft. 
.SAT AND SAT NIGHT...E winds 5 to 10 kt, becoming S. Waves around
2 ft. 
.SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft. A chance of showers.  

Winds and waves higher in and near tstms.

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.

$$

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X

ANZ237 Block Island Sound

Expires:202507160900;;498855
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ237-160900-
Block Island Sound-
404 PM EDT Tue Jul 15 2025

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

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

Expires:202507160900;;498845
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ250-160900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
404 PM EDT Tue Jul 15 2025

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

ANZ251 Massachusetts Bay and Ipswich Bay

Expires:202507160900;;498846
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ251-160900-
Massachusetts Bay and Ipswich Bay-
404 PM EDT Tue Jul 15 2025

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

Winds and seas higher in and near tstms.

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:202507160900;;498848
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ254-160900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
404 PM EDT Tue Jul 15 2025

.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds and S 1 foot at 3 seconds. Patchy fog. Vsby
1 NM or less. 
.WED...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 6 seconds. Patchy fog in the morning with vsby 1 NM or less. 
.WED NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 6 seconds.
Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after
midnight. 
.THU...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: S 4 ft at 5 seconds and E 1 foot at 9 seconds.
Patchy fog in the morning with vsby 1 to 3 NM. 
.THU NIGHT...SW winds around 15 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: S 4 ft at 6 seconds and E 1 foot at
10 seconds. 
.FRI...W winds 10 to 15 kt, becoming N in the afternoon. Gusts up
to 20 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 7 seconds and E
1 foot at 10 seconds. 
.FRI NIGHT...N winds around 10 kt. Seas 2 to 4 ft. 
.SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming S. Seas 2 to
3 ft. 
.SUN AND SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 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

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

Expires:202507160900;;498849
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ255-160900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
404 PM EDT Tue Jul 15 2025

.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 4 seconds and SE 1 foot at 7 seconds. Patchy fog. Vsby
1 NM or less. 
.WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 6 seconds. Patchy fog in the morning with vsby 1 NM or less. 
.WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
3 ft at 5 seconds and E 1 foot at 7 seconds. Patchy fog. Vsby
1 to 3 NM. 
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: S 4 ft
at 5 seconds and E 1 foot at 8 seconds. Patchy fog in the morning
with vsby 1 to 3 NM. 
.THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and E 1 foot at
10 seconds. 
.FRI...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft. Wave Detail: SW 5 ft at 7 seconds and E 1 foot at
10 seconds. 
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT AND SAT NIGHT...NE winds around 10 kt, becoming S. Seas 2 to
3 ft. 
.SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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

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

Expires:202507160900;;498850
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ256-160900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
404 PM EDT Tue Jul 15 2025

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

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:202507160900;;498856
FZUS51 KBOX 152004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Tue Jul 15 2025

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


ANZ230-160900-
Boston Harbor-
404 PM EDT Tue Jul 15 2025

.TONIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 
.WED...S winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less, then around 2 ft in the afternoon. 
.WED NIGHT...S winds around 10 kt. Waves around 2 ft in the
evening, then 1 foot or less. 
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves around 2 ft. A chance of showers. A chance of tstms in the
afternoon. 
.THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft. A chance of showers and tstms in the
evening. 
.FRI AND FRI NIGHT...N winds 5 to 10 kt. Waves around 2 ft. 
.SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming S. Waves
1 foot or less. 
.SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft. A chance of showers.  

Winds and waves higher in and near tstms.

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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