National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 192004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Sat Sep 19 2026

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

ANZ200-200900
404 PM EDT Sat Sep 19 2026

Synopsis for Massachusetts and Rhode Island coastal waters

Low pres system brings the threat of widespread rain, especially the southern waters tomorrow. High pres builds in from the N early next week with the distant system off shore, this could provide a period of strong easterly wind, near gale force, Tue into Wed. There is potential for a coastal low to track northward late week bringing strong winds and rough seas but confidence is low in the exact track and thus impacts.

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ANZ250-200900
Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary
404 PM EDT Sat Sep 19 2026

TONIGHT
SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 5 seconds and W 1 foot at 4 seconds.

SUN
SE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and E 2 ft at 4 seconds. Patchy fog in the afternoon. Showers in the afternoon.

SUN NIGHT
SE winds 10 to 15 kt, becoming E 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and SE 2 ft at 11 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
NE winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and NE 4 ft at 5 seconds. A chance of showers in the morning.

MON NIGHT
NE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and SE 2 ft at 9 seconds.

TUE AND TUE NIGHT
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 8 seconds and N 4 ft at 5 seconds.

WED THROUGH THU
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 8 ft.

THU NIGHT
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 7 to 8 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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ANZ251-200900
Massachusetts Bay and Ipswich Bay
404 PM EDT Sat Sep 19 2026

TONIGHT
SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and SW 1 foot at 5 seconds.

SUN
SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 foot at 8 seconds. Patchy fog in the afternoon. Showers in the afternoon.

SUN NIGHT
SE winds 10 to 15 kt, becoming NE 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and S 1 foot at 4 seconds. Patchy fog. Showers in the evening. A chance of showers after midnight. Vsby 1 to 3 NM.

MON
NE winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 5 seconds and NE 3 ft at 5 seconds. A chance of showers in the morning.

MON NIGHT THROUGH TUE NIGHT
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 6 seconds and NW 2 ft at 4 seconds.

WED AND WED NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 6 seconds and E 6 ft at 10 seconds.

THU
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft.

THU NIGHT
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 6 to 7 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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ANZ231-200900
Cape Cod Bay
404 PM EDT Sat Sep 19 2026

TONIGHT
SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and E 1 foot at 8 seconds.

SUN
SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 3 seconds and NW 1 foot at 4 seconds. Showers in the afternoon.

SUN NIGHT
SE winds 10 to 15 kt, becoming E 5 to 10 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: E 2 ft at 12 seconds and SE 1 foot at 3 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
NE winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and W 3 ft at 4 seconds. A chance of showers in the morning.

MON NIGHT THROUGH TUE NIGHT
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and E 3 ft at 8 seconds.

WED AND WED NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 10 seconds and NE 4 ft at 4 seconds.

THU AND THU NIGHT
NE winds 25 to 30 kt with gusts up to 40 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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ANZ254-200900
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM
404 PM EDT Sat Sep 19 2026

TONIGHT
E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 7 seconds and NW 1 foot at 4 seconds.

SUN
SE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 6 seconds and SE 2 ft at 11 seconds. Patchy fog in the afternoon. A chance of showers in the afternoon.

SUN NIGHT
SE winds 10 to 15 kt, becoming E 5 to 10 kt with gusts up to 25 kt after midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 4 seconds and SE 2 ft at 10 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
NE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 4 seconds and NW 3 ft at 4 seconds. Patchy fog in the morning. A chance of showers in the morning.

MON NIGHT
NE winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: NE 4 ft at 5 seconds and N 4 ft at 5 seconds.

TUE
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 7 seconds and N 2 ft at 5 seconds.

TUE NIGHT
NE winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 5 to 8 ft.

WED
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft.

WED NIGHT
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 7 to 10 ft.

THU
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 8 to 11 ft. A chance of showers.

THU NIGHT
NE winds 25 to 35 kt with gusts up to 40 kt. Seas 7 to 9 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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ANZ255-200900
Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket
404 PM EDT Sat Sep 19 2026

TONIGHT
E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 7 seconds and NW 1 foot at 5 seconds.

SUN
SE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 4 seconds and SE 1 foot at 7 seconds. A chance of showers in the afternoon.

SUN NIGHT
SE winds 10 to 15 kt, becoming E 5 to 10 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 3 ft at 11 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 4 seconds and NW 4 ft at 5 seconds. Patchy fog in the morning. A chance of showers in the morning.

MON NIGHT
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: N 4 ft at 6 seconds and SE 2 ft at 8 seconds.

TUE AND TUE NIGHT
NE winds 25 to 30 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 7 seconds and N 3 ft at 5 seconds.

WED
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 7 to 10 ft.

WED NIGHT
NE winds 25 to 35 kt with gusts up to 40 kt. Seas 8 to 11 ft.

THU
NE winds 30 to 35 kt with gusts up to 40 kt. Seas 7 to 10 ft. A chance of showers.

THU NIGHT
NE winds 30 to 35 kt with gusts up to 40 kt. Seas 6 to 9 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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ANZ256-200900
Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island
404 PM EDT Sat Sep 19 2026

TONIGHT
E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 5 seconds and SE 2 ft at 8 seconds.

SUN
SE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and SE 2 ft at 7 seconds. Patchy fog in the afternoon. A chance of showers in the afternoon.

SUN NIGHT
SE winds 10 to 15 kt. Gusts up to 25 kt after midnight. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 4 seconds and SE 4 ft at 11 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: NE 5 ft at 5 seconds and SE 3 ft at 10 seconds. Patchy fog in the morning. A chance of showers in the morning.

MON NIGHT
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: N 5 ft at 5 seconds and SE 2 ft at 8 seconds.

TUE
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 8 ft. Wave Detail: E 6 ft at 7 seconds and N 3 ft at 4 seconds.

TUE NIGHT
NE winds 20 to 25 kt, increasing to 25 to 30 kt after midnight. Seas 6 to 8 ft, building to 7 to 10 ft after midnight.

WED
NE winds 25 to 30 kt with gusts up to 40 kt. Seas 8 to 11 ft.

WED NIGHT
NE winds 30 to 35 kt with gusts up to 40 kt. Seas 9 to 13 ft.

THU
NE winds 30 to 35 kt with gusts up to 45 kt. Seas 8 to 11 ft. A chance of showers.

THU NIGHT
NE winds 30 to 35 kt with gusts up to 45 kt. Seas 7 to 9 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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ANZ232-200900
Nantucket Sound
404 PM EDT Sat Sep 19 2026

TONIGHT
E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 5 seconds and NW 1 foot at 5 seconds.

SUN
SE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 3 seconds and SE 1 foot at 7 seconds. Showers in the afternoon.

SUN NIGHT
SE winds 10 to 15 kt, becoming E 5 to 10 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and S 1 foot at 3 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas around 3 ft. Wave Detail: NE 3 ft at 4 seconds and NW 3 ft at 5 seconds. Patchy fog in the morning. Showers likely in the morning.

MON NIGHT AND TUE
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 7 seconds and NE 3 ft at 4 seconds.

TUE NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 6 seconds and N 1 foot at 4 seconds.

WED
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft.

WED NIGHT
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to 7 ft.

THU
NE winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to 7 ft. A chance of showers.

THU NIGHT
NE winds 30 to 35 kt with gusts up to 40 kt. Seas 4 to 5 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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ANZ233-200900
Vineyard Sound
404 PM EDT Sat Sep 19 2026

TONIGHT
E winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: E 1 foot at 3 seconds and NW 1 foot at 5 seconds.

SUN
SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 4 seconds and SE 1 foot at 8 seconds. Patchy fog in the afternoon. Showers in the afternoon.

SUN NIGHT
SE winds 10 to 15 kt, becoming E 5 to 10 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and SE 2 ft at 11 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
N winds 20 to 25 kt, becoming NE 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: NE 2 ft at 3 seconds and SE 2 ft at 10 seconds. Patchy fog in the morning. A chance of showers in the morning.

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

TUE NIGHT
NE winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 3 to 5 ft. Wave Detail: NE 3 ft at 4 seconds and SE 1 foot at 8 seconds.

WED AND WED NIGHT
NE winds 20 to 25 kt, increasing to 25 to 30 kt. Seas 4 to 6 ft.

THU AND THU NIGHT
NE winds 25 to 30 kt with gusts up to 40 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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ANZ234-200900
Buzzards Bay
404 PM EDT Sat Sep 19 2026

TONIGHT
E winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: E 1 foot at 2 seconds and NW 1 foot at 5 seconds.

SUN
SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 3 seconds and SE 1 foot at 8 seconds. Patchy fog in the afternoon. Showers in the afternoon.

SUN NIGHT
SE winds 10 to 15 kt, becoming E 5 to 10 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 12 seconds and SE 1 foot at 2 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
N winds 20 to 25 kt, becoming NE 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: NE 2 ft at 3 seconds and SE 2 ft at 10 seconds. Patchy fog in the morning. A chance of showers in the morning.

MON NIGHT THROUGH TUE NIGHT
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NE 2 ft at 3 seconds and E 2 ft at 8 seconds.

WED
NE winds 25 to 30 kt. Seas 4 to 6 ft. Wave Detail: SE 6 ft at 10 seconds and NE 4 ft at 4 seconds.

WED NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft.

THU AND THU NIGHT
NE winds 25 to 30 kt with gusts up to 40 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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ANZ235-200900
Rhode Island Sound
404 PM EDT Sat Sep 19 2026

TONIGHT
E winds around 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and NW 1 foot at 5 seconds.

SUN
SE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 2 ft at 8 seconds. Patchy fog in the afternoon. Showers likely in the afternoon.

SUN NIGHT
SE winds 10 to 15 kt, becoming E with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 5 seconds and SE 3 ft at 11 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
N winds 20 to 25 kt, becoming NE 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and SE 2 ft at 10 seconds. Patchy fog in the morning. A chance of showers in the morning.

MON NIGHT
NE winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and SE 2 ft at 8 seconds.

TUE AND TUE NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 6 seconds.

WED
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to 7 ft.

WED NIGHT
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 6 to 9 ft.

THU
NE winds 30 to 35 kt with gusts up to 40 kt. Seas 6 to 9 ft. A chance of showers.

THU NIGHT
NE winds 30 to 35 kt with gusts up to 40 kt. Seas 5 to 7 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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ANZ237-200900
Block Island Sound
404 PM EDT Sat Sep 19 2026

TONIGHT
E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and SE 1 foot at 8 seconds.

SUN
SE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 2 ft at 8 seconds. Patchy fog in the afternoon. Showers likely in the afternoon.

SUN NIGHT
SE winds 10 to 15 kt, becoming NE with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 5 seconds and SE 2 ft at 10 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and SE 2 ft at 10 seconds. Patchy fog in the morning. A chance of showers in the morning.

MON NIGHT
NE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: NE 3 ft at 5 seconds and SE 2 ft at 8 seconds.

TUE
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 4 ft at 6 seconds and N 1 foot at 5 seconds.

TUE NIGHT
NE winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 5 to 7 ft.

WED
NE winds 20 to 25 kt with gusts up to 35 kt. Seas 6 to 9 ft.

WED NIGHT
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 7 to 10 ft.

THU
NE winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to 9 ft. A chance of showers.

THU NIGHT
NE winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to 7 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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ANZ230-200900
Boston Harbor
404 PM EDT Sat Sep 19 2026

TONIGHT
SE winds 5 to 10 kt. Waves 1 foot or less.

SUN
SE winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. Patchy fog in the afternoon. Showers in the afternoon with vsby 1 to 3 NM.

SUN NIGHT
SE winds 10 to 15 kt, becoming NE after midnight. Gusts up to 20 kt. Waves around 2 ft. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
NE winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers in the morning.

MON NIGHT THROUGH TUE NIGHT
NE winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft.

WED THROUGH THU
NE winds 20 to 25 kt with gusts up to 30 kt. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance.

THU NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt. Waves 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.

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ANZ236-200900
Narragansett Bay
404 PM EDT Sat Sep 19 2026

TONIGHT
SE winds 5 to 10 kt. Waves 1 foot or less.

SUN
SE winds 5 to 10 kt. Waves around 2 ft. Patchy fog in the afternoon. Showers in the afternoon.

SUN NIGHT
SE winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Waves 2 to 3 ft. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
N winds 15 to 20 kt, becoming NE 10 to 15 kt in the afternoon. Gusts up to 25 kt. Waves 2 to 3 ft. Patchy fog in the morning. A chance of showers in the morning.

MON NIGHT THROUGH TUE NIGHT
NE winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft.

WED AND WED NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt. Waves 2 to 3 ft, except 4 to 6 ft at the bay entrance.

THU AND THU NIGHT
NE winds 20 to 25 kt. Gusts up to 40 kt, decreasing to 30 kt. Waves around 3 ft, except 4 to 6 ft at the bay entrance. 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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ANZ280-200900
Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM
404 PM EDT Sat Sep 19 2026

TONIGHT
SE winds around 5 kt, increasing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and W 1 foot at 4 seconds.

SUN
SE winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 11 seconds. Showers likely in the afternoon.

SUN NIGHT
E winds 10 to 15 kt. Gusts up to 25 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 3 ft at 4 seconds. Patchy fog. Showers likely. Vsby 1 to 3 NM.

MON
NE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 5 seconds and S 2 ft at 4 seconds.

MON NIGHT AND TUE
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: N 4 ft at 5 seconds and SE 2 ft at 8 seconds.

TUE NIGHT
NE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 7 seconds and SE 2 ft at 8 seconds.

WED AND WED NIGHT
NE winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft.

THU
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to 9 ft.

THU NIGHT
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 8 to 9 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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ANZ281-200900
Ocean Waters from Provincetown to Nantucket from 20 to 60 NM
404 PM EDT Sat Sep 19 2026

TONIGHT
E winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 7 seconds and W 1 foot at 5 seconds.

SUN
SE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 5 seconds and SE 2 ft at 11 seconds. A chance of showers in the afternoon.

SUN NIGHT
E winds around 10 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 10 seconds and E 2 ft at 4 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 4 seconds and N 3 ft at 5 seconds. A chance of showers. Patchy fog in the morning.

MON NIGHT
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 7 seconds and N 3 ft at 5 seconds.

TUE AND TUE NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 8 ft. Wave Detail: NE 7 ft at 6 seconds and SE 4 ft at 8 seconds.

WED
NE winds 20 to 25 kt with gusts up to 35 kt. Seas 7 to 10 ft.

WED NIGHT
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 9 to 12 ft.

THU AND THU NIGHT
NE winds 25 to 30 kt with gusts up to 40 kt. Seas 9 to 12 ft, subsiding to 9 to 10 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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ANZ282-200900
Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM
404 PM EDT Sat Sep 19 2026

TONIGHT
E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 7 seconds and SE 2 ft at 11 seconds.

SUN
E winds 10 to 15 kt. Seas around 3 ft. Wave Detail: E 3 ft at 7 seconds and SE 2 ft at 11 seconds.

SUN NIGHT
E winds around 10 kt. Seas around 3 ft. Wave Detail: NW 3 ft at 5 seconds and SE 3 ft at 10 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: N 4 ft at 5 seconds and SE 3 ft at 8 seconds. A chance of showers. Patchy fog in the morning.

MON NIGHT
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 5 ft at 6 seconds and NW 2 ft at 6 seconds.

TUE
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft. Wave Detail: NE 6 ft at 7 seconds.

TUE NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to 10 ft.

WED
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 9 to 12 ft.

WED NIGHT
NE winds 25 to 30 kt with gusts up to 40 kt. Seas 11 to 14 ft.

THU
NE winds 30 to 35 kt with gusts up to 40 kt. Seas 10 to 14 ft. A chance of showers.

THU NIGHT
NE winds 30 to 35 kt with gusts up to 40 kt. Seas 9 to 11 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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ANZ283-200900
Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM
404 PM EDT Sat Sep 19 2026

TONIGHT
E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 7 seconds and NW 1 foot at 4 seconds.

SUN
SE winds 10 to 15 kt. Seas around 3 ft. Wave Detail: SE 2 ft at 5 seconds and SE 2 ft at 11 seconds. A chance of showers in the afternoon.

SUN NIGHT
SE winds around 10 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 11 seconds and SE 3 ft at 8 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.

MON
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: NE 5 ft at 4 seconds and SE 3 ft at 10 seconds. Patchy fog in the morning. A chance of showers in the morning.

MON NIGHT
NE winds around 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 7 seconds and W 2 ft at 6 seconds.

TUE
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft, building to 8 to 10 ft in the afternoon. Wave Detail: E 7 ft at 7 seconds and N 3 ft at 5 seconds, becoming NE 8 ft at 6 seconds.

TUE NIGHT
NE winds 25 to 30 kt with gusts up to 35 kt. Seas 8 to 11 ft.

WED
NE winds around 30 kt with gusts up to 40 kt. Seas 10 to 13 ft.

WED NIGHT
NE winds 30 to 35 kt with gusts up to 40 kt. Seas 12 to 15 ft.

THU
NE winds around 35 kt with gusts up to 45 kt. Seas 11 to 15 ft. A chance of showers.

THU NIGHT
NE winds around 35 kt with gusts up to 45 kt. Seas 9 to 12 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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