FZUS51 KBOX 260504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 AM EDT Wed Mar 26 2025

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

ANZ200-261800
103 AM EDT Wed Mar 26 2025

Synopsis for Massachusetts and Rhode Island coastal waters

Weak high pressure south of the region today, followed by a weak low pressure system moving south of Nantucket tonight. High pressure builds in for Thursday then a trough of low pressure crosses the region on Friday.

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ANZ250-261800
Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary
103 AM EDT Wed Mar 26 2025

REST OF TONIGHT
NW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds.

WED
N winds around 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. A chance of rain in the morning.

WED NIGHT
W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE 3 ft at 8 seconds.

THU
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at 8 seconds.

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 SE 2 ft at 8 seconds.

FRI
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at 8 seconds.

FRI NIGHT
W winds around 10 kt, becoming S after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Showers likely after midnight.

SAT THROUGH SUN NIGHT
SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers likely.

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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ANZ251-261800
Massachusetts Bay and Ipswich Bay
103 AM EDT Wed Mar 26 2025

REST OF TONIGHT
NW winds around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds.

WED
NW winds around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and NW 1 foot at 2 seconds. A chance of showers in the afternoon.

WED NIGHT
W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and E 2 ft at 10 seconds.

THU
W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and E 2 ft at 8 seconds.

THU NIGHT
SW winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and E 2 ft at 8 seconds.

FRI
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and E 1 foot at 8 seconds.

FRI NIGHT
W winds 5 to 10 kt, becoming SE with gusts up to 20 kt after midnight. Seas around 2 ft. Showers likely after midnight.

SAT THROUGH SUN NIGHT
E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Showers likely.

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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ANZ231-261800
Cape Cod Bay
103 AM EDT Wed Mar 26 2025

REST OF TONIGHT
NE winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot at 3 seconds. A slight chance of rain.

WED
N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at 2 seconds. A chance of rain in the morning, then a chance of showers in the afternoon.

WED NIGHT
W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 8 seconds. A chance of showers in the evening.

THU
W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and SE 1 foot at 8 seconds.

THU NIGHT
W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 7 seconds.

FRI
W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: W 2 ft at 3 seconds and E 1 foot at 7 seconds.

FRI NIGHT
SW winds 5 to 10 kt, becoming S with gusts up to 20 kt after midnight. Seas around 2 ft in the evening, then 1 foot or less. A chance of showers after midnight.

SAT THROUGH SUN
E winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers.

SUN NIGHT
S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Showers likely.

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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ANZ254-261800
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm
103 AM EDT Wed Mar 26 2025

SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT EARLY THIS MORNING

REST OF TONIGHT
S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 9 seconds and W 1 foot at 3 seconds. A chance of rain.

WED
S winds 5 to 10 kt, becoming NW in the afternoon. Gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds. A chance of rain.

WED NIGHT
W winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE 3 ft at 8 seconds.

THU
W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and SE 3 ft at 8 seconds.

THU NIGHT
SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 8 seconds.

FRI
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 4 seconds and SE 1 foot at 8 seconds.

FRI NIGHT
SW winds around 10 kt, becoming S after midnight. Gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers after midnight.

SAT
SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.

SAT NIGHT AND SUN
E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers.

SUN NIGHT
S winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Showers likely.

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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ANZ255-261800
Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket
103 AM EDT Wed Mar 26 2025

SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT EARLY THIS MORNING

REST OF TONIGHT
S winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 8 seconds. A chance of rain.

WED
SW winds 5 to 10 kt, becoming W 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds and W 1 foot at 4 seconds. A chance of rain in the morning.

WED NIGHT
W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds and SW 3 ft at 5 seconds.

THU
W winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and SE 3 ft at 7 seconds.

THU NIGHT
SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 6 seconds and SE 2 ft at 8 seconds. A chance of showers after midnight.

FRI
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 6 seconds and SE 1 foot at 9 seconds.

FRI NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft, subsiding to 2 to 3 ft after midnight. A chance of showers after midnight.

SAT
SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers.

SAT NIGHT THROUGH SUN NIGHT
S winds 15 to 20 kt with gusts up to 25 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.

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ANZ256-261800
Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island
103 AM EDT Wed Mar 26 2025

SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT EARLY THIS MORNING

REST OF TONIGHT
W winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 8 seconds. A chance of rain.

WED
N winds 5 to 10 kt, becoming W 10 to 15 kt with gusts up to 25 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds and W 1 foot at 3 seconds. A chance of rain in the morning.

WED NIGHT
W winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds and W 3 ft at 4 seconds.

THU
W winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: NW 4 ft at 5 seconds and SE 2 ft at 8 seconds.

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 6 seconds and SE 2 ft at 8 seconds.

FRI NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 6 seconds and E 1 foot at 9 seconds. A chance of showers after midnight.

SAT
SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers.

SAT NIGHT THROUGH SUN NIGHT
S winds 15 to 20 kt with gusts up to 25 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.

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ANZ232-261800
Nantucket Sound
103 AM EDT Wed Mar 26 2025

REST OF TONIGHT
SE winds around 5 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 8 seconds and W 1 foot at 3 seconds. A slight chance of rain.

WED
SW winds around 5 kt, becoming W with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 8 seconds and W 1 foot at 4 seconds. A chance of rain in the morning.

WED NIGHT
W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 foot at 8 seconds.

THU
W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 8 seconds.

THU NIGHT AND FRI
W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 1 foot at 8 seconds.

FRI NIGHT
SW winds around 10 kt, becoming S after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers after midnight.

SAT THROUGH SUN
E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers.

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

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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ANZ233-261800
Vineyard Sound
103 AM EDT Wed Mar 26 2025

REST OF TONIGHT
NE winds around 5 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and SW 1 foot at 4 seconds. A slight chance of rain.

WED
N winds around 5 kt, becoming W with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and NW 1 foot at 4 seconds. A chance of rain in the morning, then a chance of showers in the afternoon.

WED NIGHT
W winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and S 2 ft at 8 seconds.

THU
W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and S 2 ft at 7 seconds.

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 SE 1 foot at 8 seconds.

FRI NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 10 seconds. A chance of showers after midnight.

SAT THROUGH SUN
E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.

SUN NIGHT
S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers likely.

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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ANZ234-261800
Buzzards Bay
103 AM EDT Wed Mar 26 2025

REST OF TONIGHT
N winds around 5 kt. Seas around 2 ft. Wave Detail: S 2 ft at 8 seconds and SW 1 foot at 4 seconds. A slight chance of rain.

WED
N winds around 5 kt, becoming W with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 8 seconds and NW 1 foot at 4 seconds. A chance of rain in the morning, then a chance of showers in the afternoon.

WED NIGHT
W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and S 2 ft at 8 seconds.

THU
W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 8 seconds.

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 SE 1 foot at 8 seconds.

FRI NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 10 seconds. A chance of showers after midnight.

SAT THROUGH SUN
E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.

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

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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ANZ235-261800
Rhode Island Sound
103 AM EDT Wed Mar 26 2025

REST OF TONIGHT
N winds around 5 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds. A slight chance of rain.

WED
N winds around 5 kt, becoming W 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and SW 1 foot at 3 seconds. A chance of rain in the morning. A chance of showers in the afternoon.

WED NIGHT
W 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 S 3 ft at 8 seconds.

THU
W winds around 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 8 seconds.

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 and SE 2 ft at 8 seconds.

FRI NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and SE 1 foot at 10 seconds. A chance of showers after midnight.

SAT
SW winds around 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.

SAT NIGHT AND SUN
N winds around 15 kt, becoming E. Gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers.

SUN NIGHT
S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Showers likely.

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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ANZ237-261800
Block Island Sound
103 AM EDT Wed Mar 26 2025

REST OF TONIGHT
N winds around 5 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds. A slight chance of rain.

WED
N winds around 5 kt, becoming W 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and SW 2 ft at 3 seconds. A chance of rain in the morning.

WED NIGHT
W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and W 2 ft at 3 seconds.

THU
W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 8 seconds.

THU NIGHT AND FRI
W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and SE 2 ft at 8 seconds.

FRI NIGHT
SW winds around 10 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and SE 1 foot at 9 seconds. A chance of showers after midnight.

SAT THROUGH SUN NIGHT
S winds 10 to 15 kt with gusts up to 25 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.

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ANZ230-261800
Boston Harbor
103 AM EDT Wed Mar 26 2025

REST OF TONIGHT
NW winds around 5 kt. Waves 1 foot or less.

WED
NW winds around 5 kt. Waves 1 foot or less. A chance of showers in the afternoon.

WED NIGHT
W winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Waves 1 foot or less, then around 2 ft after midnight.

THU
W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Waves around 2 ft.

THU NIGHT
SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Waves 1 foot or less, then around 2 ft after midnight.

FRI
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Waves around 2 ft.

FRI NIGHT
SW winds 5 to 10 kt, becoming SE after midnight. Waves 1 foot or less. Showers likely after midnight.

SAT THROUGH SUN NIGHT
E winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. Showers likely.

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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ANZ236-261800
Narragansett Bay
103 AM EDT Wed Mar 26 2025

REST OF TONIGHT
N winds around 5 kt. Waves around 2 ft.

WED
N winds around 5 kt, becoming W with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. A chance of rain in the morning. A chance of showers in the afternoon.

WED NIGHT
W winds 5 to 10 kt. Waves 2 to 3 ft.

THU
W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Waves 2 to 3 ft.

THU NIGHT AND FRI
W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.

FRI NIGHT
SW winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves around 2 ft. A chance of showers after midnight.

SAT THROUGH SUN
E winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers.

SUN NIGHT
S winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. Showers likely.

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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