Station List

National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 071402
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1002 AM EDT Tue Apr 7 2026

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

ANZ200-080300
1002 AM EDT Tue Apr 7 2026

Synopsis for Massachusetts and Rhode Island coastal waters

Weak low pres crosses the waters today followed by gusty NW winds this evening. Then a large high pres system builds in from the west on Wed and moves east of the waters Thu. A weak cold front crosses the waters late Fri into early Sat followed by another high pres building in for Sun.

ANZ250-080300
Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 5 PM EDT THIS AFTERNOON THROUGH WEDNESDAY MORNING

THIS AFTERNOON
SE winds 10 to 15 kt. Gusts up to 20 kt. Seas around 2 ft. Scattered showers. Scattered snow showers.

TONIGHT
NW winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 4 ft.

WED
N winds 15 to 20 kt with gusts up to 25 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 4 ft.

WED NIGHT
S winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft.

THU AND THU NIGHT
SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.

FRI
S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.

FRI NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft.

SAT AND SAT NIGHT
NW winds 10 to 15 kt, becoming N 5 to 10 kt. Seas 4 to 6 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.

ANZ251-080300
Massachusetts Bay and Ipswich Bay
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 5 PM EDT THIS AFTERNOON THROUGH WEDNESDAY MORNING

THIS AFTERNOON
SE winds around 10 kt with gusts up to 20 kt, becoming NE. Seas around 2 ft. Scattered showers. Scattered snow showers.

TONIGHT
NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 2 to 3 ft. Scattered showers in the evening.

WED
N winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt in the afternoon. Seas 2 to 3 ft.

WED NIGHT
S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.

THU
S winds 5 to 10 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft.

THU NIGHT
S winds 15 to 20 kt, becoming SW 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft.

FRI THROUGH SAT NIGHT
N winds 10 to 15 kt. Seas 2 to 4 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.

ANZ231-080300
Cape Cod Bay
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM EDT THIS AFTERNOON THROUGH WEDNESDAY MORNING

THIS AFTERNOON
SE winds 10 to 15 kt, becoming W. Gusts up to 20 kt. Seas around 2 ft. Scattered showers.

TONIGHT
NW winds 15 to 20 kt, becoming N 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 2 to 3 ft.

WED
N winds 15 to 20 kt with gusts up to 25 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 3 ft.

WED NIGHT
S winds around 5 kt. Seas around 2 ft.

THU AND THU NIGHT
S winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft.

FRI THROUGH SAT NIGHT
N 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.

ANZ254-080300
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 5 PM EDT THIS AFTERNOON THROUGH WEDNESDAY MORNING

THIS AFTERNOON
SE winds 10 to 15 kt with gusts up to 20 kt, becoming SW with gusts up to 30 kt. Seas 2 to 3 ft. Numerous showers this morning.

TONIGHT
NW winds 15 to 20 kt, becoming N 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 2 to 4 ft.

WED
N winds 15 to 20 kt, becoming NE 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.

WED NIGHT
E winds 5 to 10 kt, becoming SE after midnight. Seas 2 to 3 ft.

THU AND THU NIGHT
S winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft.

FRI
S winds 5 to 10 kt. Seas 2 to 4 ft.

FRI NIGHT THROUGH SAT NIGHT
N winds 10 to 15 kt. Seas 4 to 6 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.

ANZ255-080300
Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH WEDNESDAY MORNING

THIS AFTERNOON
S winds around 15 kt, becoming SW. Gusts up to 30 kt. Seas 3 to 4 ft. Scattered showers.

TONIGHT
NW winds 15 to 20 kt, becoming N 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 3 to 4 ft.

WED
N winds 15 to 20 kt, becoming NE 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.

WED NIGHT
E winds 5 to 10 kt. Seas 2 to 3 ft.

THU AND THU NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft.

FRI
S winds 5 to 10 kt. Seas 2 to 4 ft.

FRI NIGHT THROUGH SAT NIGHT
NE winds 10 to 15 kt. Seas 3 to 5 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.

ANZ256-080300
Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH WEDNESDAY MORNING

THIS AFTERNOON
S winds around 15 kt, becoming W. Gusts up to 30 kt. Seas 3 to 4 ft. Scattered showers this morning.

TONIGHT
NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 4 ft.

WED
N winds 15 to 20 kt, becoming E 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.

WED NIGHT
SE winds 5 to 10 kt. Seas around 2 ft.

THU
SE winds 5 to 10 kt. Seas around 2 ft.

THU NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft.

FRI
SW winds 5 to 10 kt. Seas 2 to 4 ft.

FRI NIGHT THROUGH SAT NIGHT
NE winds 10 to 15 kt. Seas 4 to 5 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.

ANZ232-080300
Nantucket Sound
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM EDT THIS AFTERNOON THROUGH WEDNESDAY MORNING

THIS AFTERNOON
S winds around 15 kt, becoming SW. Gusts up to 30 kt. Seas 2 to 3 ft. Scattered showers.

TONIGHT
NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft.

WED
N winds 15 to 20 kt, becoming NE 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft.

WED NIGHT
SE winds around 5 kt. Seas around 2 ft.

THU
SE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon.

THU NIGHT
S winds 5 to 10 kt. Seas around 2 ft.

FRI THROUGH SAT NIGHT
N 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.

ANZ233-080300
Vineyard Sound
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM EDT THIS AFTERNOON THROUGH WEDNESDAY MORNING

THIS AFTERNOON
S winds around 15 kt, becoming W. Gusts up to 25 kt. Seas 2 to 4 ft. Scattered showers this morning.

TONIGHT
NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft.

WED
N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 3 ft.

WED NIGHT
SE winds around 5 kt. Seas 1 foot or less.

THU AND THU NIGHT
SW winds 5 to 10 kt. Seas around 2 ft.

FRI THROUGH SAT NIGHT
NE 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.

ANZ234-080300
Buzzards Bay
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM EDT THIS AFTERNOON THROUGH WEDNESDAY MORNING

THIS AFTERNOON
S winds 10 to 15 kt, becoming W. Gusts up to 25 kt. Seas 2 to 4 ft. Scattered showers this morning.

TONIGHT
NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft.

WED
N winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt in the afternoon. Seas 2 to 3 ft.

WED NIGHT
SE winds around 5 kt. Seas 1 foot or less.

THU AND THU NIGHT
SW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft.

FRI THROUGH SAT NIGHT
N winds 10 to 15 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.

ANZ235-080300
Rhode Island Sound
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH WEDNESDAY MORNING

THIS AFTERNOON
S winds around 15 kt, becoming W. Gusts up to 30 kt. Seas 2 to 3 ft. Scattered showers. Isolated showers.

TONIGHT
NW winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft.

WED
N winds 10 to 15 kt with gusts up to 25 kt, becoming E 5 to 10 kt in the afternoon. Seas 2 to 3 ft.

WED NIGHT
SE winds around 5 kt. Seas around 2 ft in the evening, then 1 foot or less.

THU
SE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon.

THU NIGHT
S winds 5 to 10 kt. Seas around 2 ft.

FRI THROUGH SAT NIGHT
NE winds 10 to 15 kt. Seas 2 to 4 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.

ANZ237-080300
Block Island Sound
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH WEDNESDAY MORNING

THIS AFTERNOON
SW winds 10 to 15 kt, becoming W. Gusts up to 30 kt. Seas 2 to 3 ft. Isolated showers.

TONIGHT
NW winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft.

WED
NE winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt in the afternoon. Seas 2 to 3 ft.

WED NIGHT
SE winds around 5 kt. Seas around 2 ft in the evening, then 1 foot or less.

THU
SE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon.

THU NIGHT
S winds 5 to 10 kt. Seas around 2 ft.

FRI THROUGH SAT NIGHT
N winds 5 to 10 kt. Seas 2 to 4 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.

ANZ230-080300
Boston Harbor
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT

THIS AFTERNOON
SE winds around 10 kt, becoming N. Waves 1 foot or less. Scattered showers. Scattered snow showers.

TONIGHT
NW winds 15 to 20 kt with gusts up to 30 kt. Waves around 2 ft. Scattered showers in the evening.

WED
N winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt in the afternoon. Waves around 2 ft in the morning, then 1 foot or less.

WED NIGHT
S winds 5 to 10 kt with gusts up to 20 kt, becoming SW after midnight. Waves around 2 ft in the evening, then 1 foot or less.

THU
S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft.

THU NIGHT
S winds 10 to 15 kt with gusts up to 20 kt, becoming SW 5 to 10 kt after midnight. Waves around 2 ft.

FRI THROUGH SAT NIGHT
N winds 10 to 15 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.

ANZ236-080300
Narragansett Bay
1002 AM EDT Tue Apr 7 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT

THIS AFTERNOON
S winds around 10 kt, becoming W. Gusts up to 25 kt. Waves 2 to 3 ft. Scattered showers. Isolated showers.

TONIGHT
NW winds 10 to 15 kt with gusts up to 30 kt. Waves 2 to 3 ft.

WED
N winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt in the afternoon. Waves 2 to 3 ft in the morning, then 1 foot or less.

WED NIGHT
S winds 5 to 10 kt, diminishing to around 5 kt after midnight. Waves around 2 ft in the evening, then 1 foot or less.

THU AND THU NIGHT
SW winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft.

FRI THROUGH SAT NIGHT
N winds 10 to 15 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.

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