Station List

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National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 271404
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 AM EDT Sun Apr 27 2025

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

ANZ200-280300
1004 AM EDT Sun Apr 27 2025

Synopsis for Massachusetts and Rhode Island coastal waters

Low pres brings increasing winds and seas for today. Winds and seas gradually decrease overnight into early Mon morning. Dry and less windy Mon. Low pressure returns mid week with winds and seas increasing Tue afternoon. Chance showers Tue night into early Wed. Next system arrives Fri.

ANZ250-280300
Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary
1004 AM EDT Sun Apr 27 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING

THIS AFTERNOON
W winds around 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 4 seconds and SE 4 ft at 8 seconds. A slight chance of rain.

TONIGHT
NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: N 5 ft at 6 seconds and SE 4 ft at 9 seconds.

MON
NW winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: N 5 ft at 6 seconds and SE 2 ft at 9 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 6 seconds and SE 2 ft at 9 seconds.

TUE
SW winds 5 to 10 kt, becoming S 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: S 4 ft at 4 seconds and SE 2 ft at 9 seconds.

TUE NIGHT
SW winds around 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 9 seconds.

WED
NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft.

WED NIGHT AND THU
NW winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt. Seas 2 to 3 ft.

THU 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.

ANZ251-280300
Massachusetts Bay and Ipswich Bay
1004 AM EDT Sun Apr 27 2025

THIS AFTERNOON
W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 3 seconds and SE 2 ft at 8 seconds. A slight chance of rain.

TONIGHT
NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and SE 2 ft at 9 seconds.

MON
NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and SE 2 ft at 9 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 6 seconds and E 2 ft at 10 seconds.

TUE AND TUE NIGHT
SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and E 2 ft at 10 seconds.

WED THROUGH THU
SE winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and N 1 foot at 4 seconds.

THU NIGHT
S 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.

ANZ231-280300
Cape Cod Bay
1004 AM EDT Sun Apr 27 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING

THIS AFTERNOON
W winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 3 ft at 9 seconds.

TONIGHT
NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. Wave Detail: N 4 ft at 6 seconds and SE 2 ft at 9 seconds.

MON
NW winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft at 6 seconds and SE 1 foot at 9 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: N 2 ft at 5 seconds and SE 1 foot at 9 seconds, becoming W 1 foot at 4 seconds and N 1 foot at 6 seconds.

TUE AND TUE NIGHT
SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and NE 1 foot at 5 seconds.

WED
NW winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 9 seconds.

WED NIGHT AND THU
NW winds 5 to 10 kt, becoming E. Seas around 2 ft.

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.

ANZ254-280300
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm
1004 AM EDT Sun Apr 27 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING

THIS AFTERNOON
W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: S 6 ft at 8 seconds and W 4 ft at 5 seconds.

TONIGHT
NW winds around 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: N 5 ft at 5 seconds and SE 5 ft at 8 seconds.

MON
NW winds 15 to 20 kt with gusts up to 25 kt, diminishing to 10 to 15 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: N 5 ft at 7 seconds and SE 3 ft at 8 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 6 seconds and SE 2 ft at 9 seconds.

TUE
SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and NE 2 ft at 6 seconds.

TUE NIGHT
SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft, building to 5 to 6 ft after midnight. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 9 seconds, becoming SW 5 ft at 5 seconds and E 2 ft at 9 seconds.

WED
W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft.

WED NIGHT AND THU
NW winds around 10 kt, becoming E. Seas 2 to 4 ft.

THU NIGHT
S 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.

ANZ255-280300
Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket
1004 AM EDT Sun Apr 27 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING

THIS AFTERNOON
W winds 20 to 25 kt. Seas 5 to 7 ft. Wave Detail: S 7 ft at 8 seconds and W 6 ft at 7 seconds.

TONIGHT
NW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: W 6 ft at 7 seconds and S 4 ft at 8 seconds.

MON
NW winds 15 to 20 kt with gusts up to 25 kt, becoming W around 10 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: N 4 ft at 6 seconds and SE 2 ft at 8 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and SE 2 ft at 9 seconds.

TUE
SW winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds.

TUE NIGHT
SW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: SW 7 ft at 7 seconds and NE 1 foot at 5 seconds.

WED
W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft.

WED NIGHT
NW winds around 10 kt. Seas 3 to 5 ft.

THU
E winds around 10 kt. Seas 2 to 4 ft.

THU 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.

ANZ256-280300
Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island
1004 AM EDT Sun Apr 27 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

THIS AFTERNOON
W winds 20 to 25 kt. Seas 5 to 7 ft. Wave Detail: W 6 ft at 6 seconds and S 6 ft at 8 seconds.

TONIGHT
NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: N 5 ft at 5 seconds and S 4 ft at 8 seconds.

MON
NW winds 10 to 15 kt with gusts up to 20 kt, becoming W in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and SE 2 ft at 8 seconds.

MON NIGHT
SW winds around 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 9 seconds.

TUE
SW winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds.

TUE NIGHT
SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft, building to 6 to 7 ft after midnight. Wave Detail: SW 6 ft at 6 seconds and SE 2 ft at 9 seconds, becoming SW 7 ft at 7 seconds and SE 1 foot at 9 seconds.

WED
W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft.

WED NIGHT AND THU
N winds 10 to 15 kt, becoming E. Seas 2 to 4 ft.

THU 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.

ANZ232-280300
Nantucket Sound
1004 AM EDT Sun Apr 27 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING

THIS AFTERNOON
W winds 20 to 25 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 4 seconds and S 2 ft at 8 seconds.

TONIGHT
NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 5 seconds and SE 2 ft at 8 seconds.

MON
NW winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SE 1 foot at 8 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 4 seconds.

TUE AND TUE NIGHT
SW winds 20 to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and NE 1 foot at 6 seconds.

WED
W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: W 4 ft at 5 seconds and SE 1 foot at 9 seconds.

WED NIGHT AND THU
N winds around 10 kt, becoming E. Seas around 2 ft.

THU NIGHT
S 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.

ANZ233-280300
Vineyard Sound
1004 AM EDT Sun Apr 27 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

THIS AFTERNOON
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 7 seconds.

TONIGHT
NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 6 seconds and S 3 ft at 8 seconds.

MON
NW winds 5 to 10 kt with gusts up to 20 kt, becoming W in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 2 ft at 4 seconds and SE 1 foot at 8 seconds, becoming N 1 foot at 3 seconds and W 1 foot at 4 seconds.

MON NIGHT
SW 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.

TUE
SW winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 1 foot or less, then 2 to 4 ft in the afternoon. Wave Detail: SW 1 foot at 4 seconds and NE 1 foot at 6 seconds, becoming SW 3 ft at 4 seconds and NE 1 foot at 6 seconds.

TUE NIGHT
SW winds 20 to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 6 seconds and NE 1 foot at 5 seconds.

WED
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft.

WED NIGHT AND THU
NW winds 5 to 10 kt, becoming E. Seas 2 to 3 ft.

THU NIGHT
S 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.

ANZ234-280300
Buzzards Bay
1004 AM EDT Sun Apr 27 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

THIS AFTERNOON
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds and SW 3 ft at 4 seconds.

TONIGHT
NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 5 seconds and S 2 ft at 8 seconds.

MON
NW winds 5 to 10 kt with gusts up to 20 kt, becoming W in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 2 ft at 4 seconds and SE 1 foot at 8 seconds, becoming N 1 foot at 3 seconds and W 1 foot at 4 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 5 seconds.

TUE AND TUE NIGHT
SW winds 20 to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and NE 1 foot at 6 seconds.

WED
W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and SE 1 foot at 9 seconds.

WED NIGHT AND THU
N winds 5 to 10 kt, becoming E. Seas around 2 ft, then 1 foot or less.

THU NIGHT
S winds 10 to 15 kt. Seas 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.

ANZ235-280300
Rhode Island Sound
1004 AM EDT Sun Apr 27 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

THIS AFTERNOON
W winds 20 to 25 kt. Seas 4 to 5 ft. Wave Detail: SW 5 ft at 7 seconds.

TONIGHT
NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: NW 4 ft at 5 seconds and S 4 ft at 8 seconds.

MON
NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SE 2 ft at 8 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 9 seconds.

TUE
SW winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and SE 2 ft at 9 seconds.

TUE NIGHT
SW winds 20 to 25 kt. Seas 3 to 5 ft, building to 5 to 6 ft after midnight. Wave Detail: SW 5 ft at 5 seconds and SE 1 foot at 9 seconds, becoming SW 6 ft at 7 seconds and SE 1 foot at 9 seconds.

WED
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft.

WED NIGHT AND THU
N winds around 10 kt, becoming E. Seas 2 to 3 ft.

THU NIGHT
S 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.

ANZ237-280300
Block Island Sound
1004 AM EDT Sun Apr 27 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

THIS AFTERNOON
W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 8 seconds and W 4 ft at 5 seconds.

TONIGHT
NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: NW 4 ft at 4 seconds and S 4 ft at 8 seconds.

MON
NW winds 5 to 10 kt with gusts up to 20 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and SE 2 ft at 8 seconds.

MON NIGHT
W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 3 seconds.

TUE
SW winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds.

TUE NIGHT
SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 9 seconds.

WED
W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft.

WED NIGHT AND THU
N winds 5 to 10 kt, becoming E. Seas 2 to 3 ft.

THU NIGHT
SE 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.

ANZ230-280300
Boston Harbor
1004 AM EDT Sun Apr 27 2025

THIS AFTERNOON
W winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft.

TONIGHT
NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Waves around 2 ft.

MON
NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves around 2 ft in the morning, then 1 foot or less.

MON NIGHT
SW winds around 5 kt. Waves 1 foot or less.

TUE AND TUE NIGHT
SW winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft.

WED THROUGH THU
SE winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft.

THU NIGHT
S winds around 10 kt. 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.

ANZ236-280300
Narragansett Bay
1004 AM EDT Sun Apr 27 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

THIS AFTERNOON
W winds 15 to 20 kt with gusts up to 25 kt. Waves around 3 ft.

TONIGHT
NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Waves 2 to 3 ft.

MON
NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves around 2 ft.

MON NIGHT
SW winds around 5 kt. Waves around 2 ft in the evening, then 1 foot or less.

TUE
SW winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Waves 2 to 3 ft.

TUE NIGHT
SW winds 15 to 20 kt with gusts up to 25 kt. Waves 3 to 5 ft.

WED AND WED NIGHT
W winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt. Waves 2 to 4 ft.

THU
SE 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.

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