487
FZUS51 KBOX 041503
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 AM EST Thu Dec 4 2025

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

ANZ200-050400-
1003 AM EST Thu Dec 4 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
An arctic front will push across New England and the waters this
afternoon into the evening, producing Gale force gusts. High pres
builds over the waters Fri, followed by a low pres system passing
south on Sat.

$$

ANZ250-050400-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...W winds 15 to 20 kt with gusts up to 25 kt,
increasing to 25 to 30 kt with gusts up to 35 kt. Seas 4 to 6 ft.
Wave Detail: W 6 ft at 5 seconds and SE 3 ft at 9 seconds. A
slight chance of rain.
.TONIGHT...NW winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to
9 ft. Wave Detail: NW 8 ft at 6 seconds and SE 2 ft at
10 seconds.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt, becoming SW
5 to 10 kt in the afternoon. Seas 4 to 6 ft, subsiding to 2 to
3 ft in the afternoon. Wave Detail: NW 6 ft at 6 seconds and SE
1 foot at 10 seconds, becoming W 3 ft at 5 seconds and E 2 ft at
10 seconds.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 3 seconds and E 2 ft at 8 seconds.
.SAT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 3 seconds and SE 1 foot at 10 seconds. A chance of rain.
.SAT NIGHT...SW winds around 10 kt, becoming W after midnight.
Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot
at 10 seconds. A chance of rain in the evening.
.SUN...NW winds around 10 kt. Seas around 2 ft.
.SUN NIGHT...NW winds 15 to 20 kt. Seas 2 to 4 ft.
.MON AND MON NIGHT...NW winds 15 to 20 kt with gusts up to 25 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.

$$

ANZ251-050400-
Massachusetts Bay and Ipswich Bay-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...W winds 15 to 20 kt with gusts up to 25 kt,
increasing to 25 to 30 kt with gusts up to 35 kt. Seas 2 to 4 ft.
Wave Detail: W 4 ft at 4 seconds and E 2 ft at 8 seconds. A
slight chance of rain.
.TONIGHT...NW winds 25 to 30 kt, diminishing to 20 to 25 kt after
midnight. Gusts up to 40 kt. Seas 3 to 5 ft. Wave Detail: NW 5 ft
at 5 seconds and E 2 ft at 10 seconds.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt, becoming SW
5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft
at 4 seconds and NE 2 ft at 7 seconds.
.FRI NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 3 seconds and NE 1 foot at 7 seconds.
.SAT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S
1 foot at 2 seconds and E 1 foot at 9 seconds. A chance of rain.
A chance of snow in the morning.
.SAT NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 3 seconds and E 1 foot at 10 seconds. A
chance of rain in the evening.
.SUN THROUGH MON NIGHT...NW winds 15 to 20 kt with gusts up to
25 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.

$$

ANZ231-050400-
Cape Cod Bay-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...W winds around 15 kt with gusts up to 25 kt,
increasing to 25 to 30 kt with gusts up to 35 kt. Seas around
3 ft. Wave Detail: W 3 ft at 4 seconds and NE 1 foot at
7 seconds. A slight chance of rain.
.TONIGHT...NW winds 25 to 30 kt with gusts up to 40 kt. Seas 3 to
5 ft. Wave Detail: NW 5 ft at 6 seconds and E 1 foot at
9 seconds.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt, becoming SW
5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: N 4 ft
at 7 seconds.
.FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N
2 ft at 6 seconds.
.SAT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SE
1 foot at 3 seconds and NE 1 foot at 6 seconds. A chance of rain.
.SAT NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas
1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot
at 7 seconds. A chance of rain in the evening.
.SUN THROUGH MON NIGHT...NW winds 15 to 20 kt with gusts up to
25 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.

$$

ANZ254-050400-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...W winds around 20 kt, increasing to 25 to
30 kt. Seas 4 to 6 ft. Wave Detail: W 6 ft at 5 seconds and SE
4 ft at 9 seconds.
.TONIGHT...NW winds 30 to 35 kt, diminishing to 25 to 30 kt after
midnight. Seas 5 to 8 ft. Wave Detail: NW 8 ft at 6 seconds and
SE 3 ft at 10 seconds.
.FRI...NW winds 15 to 20 kt, becoming SW 5 to 10 kt in the
afternoon. Seas 4 to 6 ft, subsiding to 2 to 4 ft in the
afternoon. Wave Detail: NW 6 ft at 7 seconds and E 2 ft at
10 seconds, becoming NW 4 ft at 7 seconds and E 2 ft at
10 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming SE after midnight.
Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and NE 3 ft at
10 seconds. A chance of rain after midnight.
.SAT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 4 seconds and E 2 ft at 8 seconds. A chance of rain.
.SAT NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and SE 2 ft
at 9 seconds. A chance of rain in the evening.
.SUN AND SUN NIGHT...NW winds around 10 kt, increasing to 15 to
20 kt. Seas 2 to 4 ft.
.MON AND MON NIGHT...N winds 15 to 20 kt with gusts up to 25 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.

$$

ANZ255-050400-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...W winds 20 to 25 kt, increasing to 25 to 30 kt.
Seas 4 to 6 ft, building to 5 to 8 ft. Wave Detail: SW 6 ft at
6 seconds and S 4 ft at 9 seconds, becoming SW 8 ft at 7 seconds
and SE 3 ft at 10 seconds.
.TONIGHT...NW winds 30 to 35 kt, diminishing to 25 to 30 kt after
midnight. Seas 5 to 8 ft. Wave Detail: W 8 ft at 7 seconds and SE
2 ft at 10 seconds.
.FRI...N winds 10 to 15 kt with gusts up to 20 kt, becoming SW
5 to 10 kt in the afternoon. Seas 3 to 5 ft, subsiding to 2 to
3 ft in the afternoon. Wave Detail: NW 4 ft at 6 seconds and NE
2 ft at 9 seconds, becoming W 2 ft at 6 seconds and E 2 ft at
9 seconds.
.FRI NIGHT...S winds 5 to 10 kt, becoming SE after midnight. Seas
2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and SE 2 ft at
9 seconds. A chance of rain.
.SAT...SE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 3 seconds and E 2 ft at 9 seconds. A chance of rain.
.SAT NIGHT...W winds around 10 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and S 2 ft at
3 seconds. A chance of rain in the evening.
.SUN...NW winds around 10 kt. Seas 2 to 3 ft.
.SUN NIGHT AND MON...NW winds 15 to 20 kt, becoming N 20 to
25 kt. Seas 3 to 5 ft.
.MON NIGHT...N winds 20 to 25 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.

$$

ANZ256-050400-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...W winds 20 to 25 kt, increasing to 25 to 30 kt
with gusts up to 35 kt. Seas 5 to 7 ft. Wave Detail: W 7 ft at
6 seconds and S 3 ft at 9 seconds.
.TONIGHT...NW winds 25 to 35 kt, becoming N 20 to 25 kt after
midnight. Seas 6 to 8 ft, subsiding to 4 to 6 ft after midnight.
Wave Detail: NW 8 ft at 6 seconds and SE 2 ft at 10 seconds,
becoming NW 6 ft at 6 seconds and SE 2 ft at 10 seconds.
.FRI...N winds 10 to 15 kt, becoming S 5 to 10 kt in the
afternoon. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 5 seconds and
E 2 ft at 10 seconds.
.FRI NIGHT...S winds 5 to 10 kt, becoming SE after midnight. Seas
2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and SE 2 ft at
10 seconds. A chance of rain.
.SAT...SE winds around 10 kt, becoming S in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 2 ft at
10 seconds. A chance of rain.
.SAT NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SE 3 ft at 9 seconds and W 2 ft at 4 seconds. A chance of rain in
the evening.
.SUN...NW winds around 10 kt. Seas 2 to 3 ft.
.SUN NIGHT THROUGH MON NIGHT...N winds 20 to 25 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.

$$

ANZ232-050400-
Nantucket Sound-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...W winds 15 to 20 kt with gusts up to 25 kt,
increasing to 25 to 30 kt with gusts up to 35 kt. Seas 3 to 4 ft.
Wave Detail: W 4 ft at 4 seconds and SE 1 foot at 9 seconds.
.TONIGHT...NW winds 25 to 30 kt, diminishing to 20 to 25 kt after
midnight. Gusts up to 40 kt. Seas 3 to 5 ft. Wave Detail: W 5 ft
at 5 seconds and SE 1 foot at 9 seconds.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt, becoming SW
5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft
at 4 seconds and NE 1 foot at 9 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming SE after midnight.
Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E
1 foot at 9 seconds. A chance of rain after midnight.
.SAT...SE winds around 10 kt. Seas around 2 ft. Wave Detail: SE
1 foot at 3 seconds and E 1 foot at 9 seconds. A chance of rain.
.SAT NIGHT...SW winds around 10 kt, becoming NW after midnight.
Seas 1 foot or less, then around 2 ft after midnight. Wave
Detail: SW 1 foot at 3 seconds and E 1 foot at 9 seconds,
becoming W 1 foot at 3 seconds and SE 1 foot at 8 seconds. A
chance of rain in the evening.
.SUN AND SUN NIGHT...NW winds around 10 kt, increasing to 15 to
20 kt. Seas 2 to 3 ft.
.MON AND MON NIGHT...N winds 20 to 25 kt, diminishing to 15 to
20 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.

$$

ANZ233-050400-
Vineyard Sound-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...W winds 15 to 20 kt with gusts up to 25 kt,
increasing to 25 to 30 kt with gusts up to 35 kt. Seas 3 to 4 ft.
Wave Detail: SW 4 ft at 5 seconds and S 2 ft at 9 seconds.
.TONIGHT...NW winds 25 to 30 kt with gusts up to 40 kt,
diminishing to 20 to 25 kt with gusts up to 30 kt after midnight.
Seas 3 to 5 ft. Wave Detail: W 5 ft at 6 seconds and SE 1 foot at
10 seconds.
.FRI...N winds 10 to 15 kt, becoming SW 5 to 10 kt in the
afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 5 seconds
and NE 1 foot at 8 seconds.
.FRI NIGHT...S winds 5 to 10 kt, becoming SE after midnight. Seas
around 2 ft. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at
9 seconds. A chance of rain.
.SAT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
1 foot at 3 seconds and SE 1 foot at 9 seconds. A chance of rain.
.SAT NIGHT...W winds around 10 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 3 seconds and SE 1 foot at 8 seconds. A chance of
rain in the evening.
.SUN THROUGH MON NIGHT...N winds 15 to 20 kt with gusts up to
25 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.

$$

ANZ234-050400-
Buzzards Bay-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...W winds around 15 kt with gusts up to 25 kt,
increasing to 20 to 25 kt with gusts up to 35 kt. Seas 3 to 4 ft.
Wave Detail: SW 4 ft at 6 seconds and S 1 foot at 9 seconds.
.TONIGHT...NW winds 25 to 30 kt with gusts up to 40 kt,
diminishing to 15 to 20 kt with gusts up to 30 kt after midnight.
Seas 2 to 4 ft. Wave Detail: W 4 ft at 5 seconds and SE 1 foot at
10 seconds.
.FRI...NW winds 10 to 15 kt, becoming SW 5 to 10 kt in the
afternoon. Seas around 2 ft in the morning, then 1 foot or less.
Wave Detail: N 2 ft at 6 seconds, becoming SW 1 foot at 5 seconds
and E 1 foot at 9 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming SE after midnight.
Seas around 2 ft in the evening, then 1 foot or less. Wave
Detail: SW 1 foot at 3 seconds and E 1 foot at 9 seconds,
becoming S 1 foot at 3 seconds and SE 1 foot at 9 seconds. A
chance of rain after midnight.
.SAT...SE winds 5 to 10 kt, becoming S in the afternoon. Seas
1 foot or less. Wave Detail: SE 1 foot at 2 seconds and SE 1 foot
at 9 seconds. A chance of rain.
.SAT NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 3 seconds and SE 1 foot at 8 seconds. A
chance of rain in the evening.
.SUN THROUGH MON NIGHT...N winds 15 to 20 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.

$$

ANZ235-050400-
Rhode Island Sound-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...W winds 15 to 20 kt with gusts up to 25 kt,
increasing to 25 to 30 kt with gusts up to 35 kt. Seas 3 to 5 ft.
Wave Detail: W 5 ft at 7 seconds and S 3 ft at 9 seconds.
.TONIGHT...NW winds 25 to 30 kt with gusts up to 40 kt, becoming
N 20 to 25 kt with gusts up to 30 kt after midnight. Seas 4 to
6 ft. Wave Detail: W 6 ft at 6 seconds and SE 2 ft at 10 seconds.
.FRI...N winds 10 to 15 kt, becoming SW 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 5 seconds and
E 2 ft at 10 seconds.
.FRI NIGHT...S winds 5 to 10 kt, becoming SE after midnight. Seas
around 2 ft. Wave Detail: S 2 ft at 3 seconds and SE 1 foot at
10 seconds. A chance of rain.
.SAT...SE winds around 10 kt, becoming S in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 4 seconds and SE 1 foot at
10 seconds. A chance of rain.
.SAT NIGHT...NW winds around 10 kt. Seas around 2 ft. Wave
Detail: SW 2 ft at 4 seconds and SE 2 ft at 9 seconds. A chance
of rain in the evening.
.SUN THROUGH MON NIGHT...N winds 15 to 20 kt with gusts up to
25 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.

$$

ANZ237-050400-
Block Island Sound-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...W winds 20 to 25 kt. Gusts up to 25 kt,
increasing to 35 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at
5 seconds and SE 3 ft at 9 seconds.
.TONIGHT...NW winds 25 to 30 kt with gusts up to 40 kt, becoming
N 15 to 20 kt with gusts up to 30 kt after midnight. Seas 3 to
5 ft. Wave Detail: W 5 ft at 5 seconds and SE 2 ft at 10 seconds.
.FRI...N winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and NE 2 ft at
8 seconds.
.FRI NIGHT...S winds 5 to 10 kt, becoming SE after midnight. Seas
around 2 ft. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at
10 seconds. A chance of rain.
.SAT...SE winds 5 to 10 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at
10 seconds. A chance of rain.
.SAT NIGHT...NW winds around 10 kt. Seas around 2 ft. Wave
Detail: W 2 ft at 4 seconds and SE 2 ft at 9 seconds. A chance of
rain in the evening.
.SUN THROUGH MON NIGHT...N winds 15 to 20 kt with gusts up to
25 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.

$$

ANZ230-050400-
Boston Harbor-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT FROM 4 PM EST THIS AFTERNOON THROUGH
LATE TONIGHT...

.THIS AFTERNOON...W winds around 15 kt with gusts up to 25 kt,
increasing to 20 to 25 kt with gusts up to 35 kt. Waves around
2 ft. A slight chance of rain.
.TONIGHT...NW winds 25 to 30 kt with gusts up to 40 kt,
diminishing to 20 to 25 kt with gusts up to 30 kt after midnight.
Waves around 2 ft.
.FRI...W winds 10 to 15 kt, becoming SW 5 to 10 kt in the
afternoon. Waves 1 foot or less.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.SAT...S winds 5 to 10 kt. Waves 1 foot or less. A chance of
rain. A chance of snow in the morning.
.SAT NIGHT...W winds 5 to 10 kt. Waves 1 foot or less. A chance
of rain in the evening.
.SUN THROUGH MON NIGHT...NW winds 15 to 20 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.

$$

ANZ236-050400-
Narragansett Bay-
1003 AM EST Thu Dec 4 2025

...GALE WARNING IN EFFECT FROM 4 PM EST THIS AFTERNOON THROUGH
LATE TONIGHT...

.THIS AFTERNOON...W winds 10 to 15 kt with gusts up to 20 kt,
increasing to 15 to 20 kt with gusts up to 30 kt. Waves 2 to
3 ft.
.TONIGHT...NW winds 20 to 25 kt, becoming N 15 to 20 kt after
midnight. Gusts up to 35 kt. Waves 2 to 3 ft.
.FRI...NW winds 5 to 10 kt, becoming SW in the afternoon. Waves
around 2 ft in the morning, then 1 foot or less.
.FRI NIGHT...SW winds around 5 kt, becoming E after midnight.
Waves around 2 ft. A chance of rain, snow and freezing rain after
midnight.
.SAT...SE winds around 5 kt, becoming SW in the afternoon. Waves
around 2 ft. A chance of rain. A chance of snow in the morning.
.SAT NIGHT...W winds 5 to 10 kt. Waves around 2 ft. A chance of
rain in the evening.
.SUN THROUGH MON NIGHT...N winds 10 to 15 kt with gusts up to
20 kt. Waves 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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