National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 092004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Wed Sep 9 2026

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

ANZ200-100900
404 PM EDT Wed Sep 9 2026

Synopsis for Massachusetts and Rhode Island coastal waters

High pres moves off the mid-Atlantic coast. Gusty SW winds will develop ahead of this cold front tonight and turn more W Thu behind the front. High pres then builds behind this front Fri into Sat. This high will shift east of the waters by Sun as a warm front crosses the region.

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ANZ250-100900
Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary
404 PM EDT Wed Sep 9 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY EVENING

TONIGHT
S winds 15 to 20 kt, becoming SW 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 5 seconds and E 2 ft at 5 seconds. A chance of showers. A slight chance of tstms after midnight.

THU
SW winds 20 to 25 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 5 seconds and SE 2 ft at 9 seconds. A chance of showers in the morning.

THU NIGHT
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 10 seconds.

FRI
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 1 foot at 10 seconds.

FRI NIGHT
W winds around 5 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 10 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and N 1 foot at 4 seconds.

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.

MON AND MON NIGHT
NW winds 5 to 10 kt, becoming SE. Seas around 2 ft.

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.

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ANZ251-100900
Massachusetts Bay and Ipswich Bay
404 PM EDT Wed Sep 9 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY EVENING

TONIGHT
S winds 15 to 20 kt, becoming SW 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and E 1 foot at 4 seconds. A chance of showers. A slight chance of tstms after midnight.

THU
SW winds 15 to 20 kt with gusts up to 30 kt, becoming W 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 5 seconds. A chance of showers in the morning.

THU NIGHT
W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 foot at 10 seconds.

FRI
NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and SE 1 foot at 10 seconds.

FRI NIGHT
NW winds around 5 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 10 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and NE 1 foot at 4 seconds.

SUN AND SUN NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers.

MON AND MON NIGHT
N winds 5 to 10 kt, becoming SE. Seas around 2 ft.

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.

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ANZ231-100900
Cape Cod Bay
404 PM EDT Wed Sep 9 2026

GALE WARNING IN EFFECT FROM 10 PM EDT THIS EVENING THROUGH THURSDAY MORNING

TONIGHT
S winds 15 to 20 kt with gusts up to 25 kt, becoming SW 20 to 25 kt with gusts up to 40 kt after midnight. Seas 3 to 5 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 4 seconds. A slight chance of showers after midnight.

THU
SW winds 20 to 25 kt with gusts up to 40 kt, diminishing to 10 to 15 kt with gusts up to 25 kt in the afternoon. Seas 3 to 5 ft, subsiding to 2 to 3 ft in the afternoon. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 5 seconds, becoming SW 2 ft at 3 seconds and SE 1 foot at 4 seconds.

THU NIGHT
W winds 10 to 15 kt, becoming NW after midnight. Gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 foot at 9 seconds.

FRI
NW winds around 10 kt with gusts up to 20 kt, becoming NE in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 10 seconds.

FRI NIGHT
SW winds around 5 kt, becoming N around 5 kt after midnight. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 10 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 9 seconds.

SUN AND SUN NIGHT
S winds 5 to 10 kt, becoming SW. Seas around 2 ft. A chance of showers.

MON AND MON NIGHT
NW winds 5 to 10 kt, becoming SE. Seas around 2 ft, then 1 foot or less.

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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ANZ254-100900
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM
404 PM EDT Wed Sep 9 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY EVENING

TONIGHT
S winds 15 to 20 kt, becoming SW 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 2 to 3 ft, building to 3 to 5 ft after midnight. Wave Detail: S 3 ft at 4 seconds and E 1 foot at 4 seconds, becoming S 5 ft at 5 seconds and E 1 foot at 4 seconds. A slight chance of showers after midnight.

THU
SW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 6 seconds and E 1 foot at 5 seconds.

THU NIGHT
W winds 10 to 15 kt, becoming NW after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and SE 1 foot at 10 seconds.

FRI
N winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 6 seconds and N 1 foot at 3 seconds.

FRI NIGHT
SW winds around 5 kt, becoming NW around 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 2 ft at 6 seconds and NE 1 foot at 5 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 6 seconds and N 1 foot at 5 seconds.

SUN AND SUN NIGHT
S winds 10 to 15 kt with gusts up to 20 kt, becoming SW. Seas 2 to 3 ft. A chance of showers.

MON AND MON NIGHT
NW winds 5 to 10 kt, becoming E. 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.

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ANZ255-100900
Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket
404 PM EDT Wed Sep 9 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY EVENING

TONIGHT
S winds 15 to 20 kt, becoming SW 20 to 25 kt after midnight. Gusts up to 35 kt. Seas 2 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: S 4 ft at 5 seconds and E 1 foot at 4 seconds, becoming SW 6 ft at 7 seconds and E 2 ft at 3 seconds.

THU
SW winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Seas 5 to 7 ft. Wave Detail: SW 7 ft at 7 seconds and E 1 foot at 5 seconds.

THU NIGHT
W winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 8 seconds and SE 1 foot at 9 seconds.

FRI
N winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and N 1 foot at 3 seconds.

FRI NIGHT
SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and N 1 foot at 3 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and NE 1 foot at 5 seconds.

SUN AND SUN NIGHT
S winds 10 to 15 kt, becoming SW. Seas around 2 ft. A chance of showers.

MON AND MON NIGHT
NW winds 5 to 10 kt, becoming E. 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.

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ANZ256-100900
Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island
404 PM EDT Wed Sep 9 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY EVENING

TONIGHT
SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft, building to 5 to 7 ft after midnight. Wave Detail: SW 5 ft at 5 seconds and E 1 foot at 3 seconds, becoming SW 7 ft at 7 seconds and SE 3 ft at 3 seconds.

THU
SW winds 25 to 30 kt, diminishing to 15 to 20 kt in the afternoon. Seas 5 to 8 ft. Wave Detail: SW 8 ft at 7 seconds and E 1 foot at 4 seconds.

THU NIGHT
W winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and SE 1 foot at 10 seconds.

FRI
N winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: W 4 ft at 7 seconds and N 1 foot at 3 seconds.

FRI NIGHT
W winds around 10 kt, becoming N after midnight. Seas around 3 ft. Wave Detail: SW 3 ft at 7 seconds and N 1 foot at 3 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and NE 1 foot at 3 seconds.

SUN AND SUN NIGHT
S winds around 10 kt, becoming SW. Seas around 2 ft. A chance of showers.

MON AND MON NIGHT
W winds 5 to 10 kt, becoming SE. 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.

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ANZ232-100900
Nantucket Sound
404 PM EDT Wed Sep 9 2026

GALE WARNING IN EFFECT FROM 10 PM EDT THIS EVENING THROUGH THURSDAY MORNING

TONIGHT
S winds 15 to 20 kt, becoming SW 25 to 30 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 1 foot at 4 seconds.

THU
SW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 35 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 1 foot at 5 seconds.

THU NIGHT
W winds 10 to 15 kt, becoming NW after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and SE 1 foot at 9 seconds.

FRI
N winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and SE 1 foot at 10 seconds.

FRI NIGHT
SW winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 5 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 4 seconds and SW 1 foot at 6 seconds.

SUN AND SUN NIGHT
S winds 10 to 15 kt with gusts up to 20 kt, becoming SW. Seas around 2 ft. A chance of showers.

MON AND MON NIGHT
NW winds 5 to 10 kt, becoming E. 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.

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ANZ233-100900
Vineyard Sound
404 PM EDT Wed Sep 9 2026

GALE WARNING IN EFFECT FROM 10 PM EDT THIS EVENING THROUGH THURSDAY MORNING

TONIGHT
SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 35 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and SE 3 ft at 6 seconds.

THU
SW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 35 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and S 5 ft at 10 seconds.

THU NIGHT
W winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and SE 1 foot at 11 seconds.

FRI
N winds around 10 kt with gusts up to 20 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 7 seconds and N 1 foot at 3 seconds.

FRI NIGHT
W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 7 seconds and N 1 foot at 2 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and SW 2 ft at 7 seconds.

SUN AND SUN NIGHT
S winds 10 to 15 kt, becoming SW 5 to 10 kt. Seas around 2 ft. A chance of showers.

MON AND MON NIGHT
W winds 5 to 10 kt, becoming SE. 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.

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ANZ234-100900
Buzzards Bay
404 PM EDT Wed Sep 9 2026

GALE WARNING IN EFFECT FROM 10 PM EDT THIS EVENING THROUGH THURSDAY MORNING

TONIGHT
SW winds 20 to 25 kt with gusts up to 30 kt, increasing to 25 to 30 kt with gusts up to 40 kt after midnight. Seas 3 to 5 ft. Wave Detail: S 5 ft at 5 seconds and SE 1 foot at 10 seconds.

THU
SW winds 25 to 30 kt with gusts up to 40 kt, diminishing to 15 to 20 kt with gusts up to 30 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and S 5 ft at 10 seconds.

THU NIGHT
W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and SE 1 foot at 11 seconds.

FRI
N winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: W 2 ft at 7 seconds and N 1 foot at 4 seconds.

FRI NIGHT
W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 7 seconds and N 1 foot at 2 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and SW 1 foot at 7 seconds.

SUN AND SUN NIGHT
S winds 10 to 15 kt with gusts up to 20 kt, becoming SW 5 to 10 kt. Seas around 2 ft. A chance of showers.

MON AND MON NIGHT
W winds 5 to 10 kt, becoming SE. Seas 1 foot or less.

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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ANZ235-100900
Rhode Island Sound
404 PM EDT Wed Sep 9 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY EVENING

TONIGHT
SW winds 20 to 25 kt with gusts up to 35 kt. Seas 3 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: S 4 ft at 6 seconds and SE 1 foot at 10 seconds, becoming SW 6 ft at 7 seconds and SE 4 ft at 4 seconds.

THU
SW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and S 4 ft at 10 seconds.

THU NIGHT
W winds 10 to 15 kt, becoming NW after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and SE 1 foot at 10 seconds.

FRI
N winds around 10 kt with gusts up to 20 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and N 1 foot at 3 seconds.

FRI NIGHT
W winds 5 to 10 kt, becoming N after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and NE 1 foot at 2 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and S 2 ft at 7 seconds.

SUN AND SUN NIGHT
S winds around 10 kt, becoming SW. Seas around 2 ft. A chance of showers.

MON AND MON NIGHT
W winds 5 to 10 kt, becoming SE. 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.

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ANZ237-100900
Block Island Sound
404 PM EDT Wed Sep 9 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY EVENING

TONIGHT
SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: S 4 ft at 4 seconds and SE 1 foot at 9 seconds, becoming S 6 ft at 5 seconds and SE 1 foot at 10 seconds.

THU
SW winds 20 to 25 kt, diminishing to around 15 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and SE 2 ft at 10 seconds.

THU NIGHT
W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and SE 1 foot at 10 seconds.

FRI
NW winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and N 1 foot at 3 seconds.

FRI NIGHT
NW winds 5 to 10 kt, becoming N after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 7 seconds and SE 1 foot at 10 seconds.

SAT
NE winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and S 1 foot at 2 seconds.

SAT NIGHT
S winds 5 to 10 kt. Seas around 2 ft. A chance of showers after midnight.

SUN AND SUN NIGHT
S winds 5 to 10 kt, becoming SW. Seas around 2 ft. A chance of showers.

MON AND MON NIGHT
W winds 5 to 10 kt, becoming S. 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.

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ANZ230-100900
Boston Harbor
404 PM EDT Wed Sep 9 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY EVENING

TONIGHT
S winds 15 to 20 kt. Gusts up to 30 kt after midnight. Waves around 2 ft. A chance of showers. A slight chance of tstms after midnight.

THU
W winds 15 to 20 kt with gusts up to 30 kt. Waves around 2 ft. A chance of showers in the morning.

THU NIGHT
W winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves around 2 ft in the evening, then 1 foot or less.

FRI
NW winds 5 to 10 kt. Waves 1 foot or less.

FRI NIGHT
NW winds around 5 kt. Waves 1 foot or less.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Waves around 2 ft.

SUN AND SUN NIGHT
SW winds 5 to 10 kt. Waves around 2 ft, then 1 foot or less. A chance of showers.

MON AND MON NIGHT
N winds 5 to 10 kt, becoming SE. Waves 1 foot or less.

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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ANZ236-100900
Narragansett Bay
404 PM EDT Wed Sep 9 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY EVENING

TONIGHT
SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Waves 2 to 4 ft.

THU
SW winds 15 to 20 kt, becoming W 10 to 15 kt in the afternoon. Gusts up to 30 kt. Waves 2 to 4 ft.

THU NIGHT
NW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft.

FRI
N winds 5 to 10 kt, becoming W in the afternoon. Waves around 2 ft.

FRI NIGHT
NW winds 5 to 10 kt, becoming N after midnight. Waves around 2 ft.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Waves around 2 ft.

SUN AND SUN NIGHT
S winds 5 to 10 kt, becoming SW. Waves around 2 ft. A chance of showers.

MON AND MON NIGHT
W winds 5 to 10 kt, becoming S. 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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ANZ280-100900
Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM
404 PM EDT Wed Sep 9 2026

TONIGHT
S winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to 5 ft, building to 5 to 7 ft after midnight. Wave Detail: S 5 ft at 5 seconds and NE 1 foot at 4 seconds, becoming S 7 ft at 6 seconds and NE 1 foot at 5 seconds. A slight chance of showers this evening, then a chance of showers with a slight chance of tstms after midnight. Patchy fog after midnight.

THU
SW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 35 kt. Seas 5 to 7 ft. Wave Detail: SW 7 ft at 6 seconds and SE 3 ft at 8 seconds. A chance of showers in the morning.

THU NIGHT
W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and SE 2 ft at 8 seconds.

FRI
NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and S 2 ft at 9 seconds.

FRI NIGHT
W winds 5 to 10 kt, becoming N after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and W 2 ft at 6 seconds.

SAT AND SAT NIGHT
S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and N 1 foot at 3 seconds.

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.

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

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.

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ANZ281-100900
Ocean Waters from Provincetown to Nantucket from 20 to 60 NM
404 PM EDT Wed Sep 9 2026

TONIGHT
S winds 15 to 20 kt with gusts up to 25 kt, becoming SW 20 to 25 kt with gusts up to 35 kt after midnight. Seas 3 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: S 4 ft at 4 seconds and SE 1 foot at 9 seconds, becoming SW 6 ft at 5 seconds and SE 2 ft at 9 seconds. A slight chance of showers after midnight.

THU
SW winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 7 ft. Wave Detail: SW 7 ft at 7 seconds and SE 2 ft at 9 seconds.

THU NIGHT
W winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: SW 6 ft at 8 seconds and SE 2 ft at 10 seconds.

FRI
NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas 3 to 5 ft. Wave Detail: W 5 ft at 7 seconds and N 2 ft at 3 seconds.

FRI NIGHT
W winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and NE 1 foot at 5 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and SE 2 ft at 10 seconds.

SUN AND SUN NIGHT
S winds around 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers.

MON AND MON NIGHT
NW winds 5 to 10 kt, becoming NE. 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.

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ANZ282-100900
Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM
404 PM EDT Wed Sep 9 2026

TONIGHT
S winds 10 to 15 kt, becoming SW 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 2 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds, becoming SW 6 ft at 6 seconds and SE 2 ft at 9 seconds.

THU
SW winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft. Wave Detail: SW 8 ft at 8 seconds and SE 2 ft at 9 seconds.

THU NIGHT
SW winds 15 to 20 kt with gusts up to 30 kt, becoming NW 10 to 15 kt with gusts up to 20 kt after midnight. Seas 6 to 8 ft, subsiding to 5 to 6 ft after midnight. Wave Detail: SW 8 ft at 8 seconds and SE 1 foot at 9 seconds, becoming SW 6 ft at 7 seconds and SE 1 foot at 10 seconds.

FRI
N winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 7 seconds and N 1 foot at 3 seconds.

FRI NIGHT
W winds around 5 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 7 seconds and N 1 foot at 4 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and NE 1 foot at 5 seconds.

SUN AND SUN NIGHT
S winds 5 to 10 kt, becoming SW. Seas around 2 ft. A chance of showers.

MON AND MON NIGHT
NW winds 5 to 10 kt, becoming NE. 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.

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ANZ283-100900
Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM
404 PM EDT Wed Sep 9 2026

TONIGHT
SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft, building to 5 to 8 ft after midnight. Wave Detail: SW 5 ft at 5 seconds and NE 1 foot at 4 seconds, becoming SW 8 ft at 7 seconds and E 1 foot at 4 seconds.

THU
SW winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to 9 ft. Wave Detail: SW 9 ft at 7 seconds and E 1 foot at 4 seconds.

THU NIGHT
SW winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: SW 7 ft at 7 seconds and SE 1 foot at 10 seconds.

FRI
N winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: W 4 ft at 7 seconds and N 1 foot at 3 seconds.

FRI NIGHT
W winds 5 to 10 kt, becoming N after midnight. Seas around 3 ft. Wave Detail: SW 3 ft at 7 seconds and N 1 foot at 4 seconds.

SAT AND SAT NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 7 seconds and NE 1 foot at 5 seconds.

SUN AND SUN NIGHT
S winds around 10 kt, becoming SW. Seas around 2 ft. A chance of showers.

MON AND MON NIGHT
NW winds 5 to 10 kt, becoming E. 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.

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