438
FZUS51 KBOX 220905
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
405 AM EST Sat Nov 22 2025

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

ANZ200-222200-
405 AM EST Sat Nov 22 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
A weak wave of low pressure passes south of the waters and results
in rain showers mainly for the southern waters, high pressure builds
into the region late today into Sunday. High pressure moves offshore
Tuesday. Rain possible late Tuesday into Thursday with a frontal
system.

$$

ANZ250-222200-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
405 AM EST Sat Nov 22 2025

.TODAY...NW winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at
7 seconds. A chance of rain, mainly this morning.
.TONIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and E
2 ft at 7 seconds.
.SUN...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at
4 seconds and E 1 foot at 7 seconds.
.SUN NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and NE
1 foot at 4 seconds.
.MON AND MON NIGHT...NW winds 15 to 20 kt. Seas 2 to 4 ft. Wave
Detail: NW 3 ft at 4 seconds and SE 1 foot at 7 seconds.
.TUE...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft
at 4 seconds and N 1 foot at 5 seconds.
.TUE NIGHT THROUGH WED NIGHT...W winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 4 ft. Rain.

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.

$$

ANZ251-222200-
Massachusetts Bay and Ipswich Bay-
405 AM EST Sat Nov 22 2025

.TODAY...NW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt this afternoon. Seas around 2 ft. Wave Detail:
E 2 ft at 7 seconds and W 1 foot at 3 seconds. A chance of rain,
mainly this morning.
.TONIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and E
2 ft at 7 seconds.
.SUN...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N
1 foot at 4 seconds and E 1 foot at 7 seconds.
.SUN 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 NE 1 foot at 4 seconds.
.MON AND MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and S 1 foot at
6 seconds.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W
1 foot at 3 seconds and NE 1 foot at 4 seconds.
.TUE NIGHT AND WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Rain.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of rain.

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.

$$

ANZ231-222200-
Cape Cod Bay-
405 AM EST Sat Nov 22 2025

.TODAY...NW winds 5 to 10 kt, increasing to 10 to 15 kt this
afternoon. Seas 1 foot or less, then around 2 ft this afternoon.
Wave Detail: NW 1 foot at 3 seconds and SE 1 foot at 6 seconds.
Rain likely, mainly this morning. Patchy fog this morning with
vsby 1 to 3 NM.
.TONIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and
SE 1 foot at 6 seconds.
.SUN...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft
at 4 seconds and E 1 foot at 7 seconds.
.SUN 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:
NW 2 ft at 4 seconds and E 1 foot at 7 seconds. Scattered showers
in the evening.
.MON AND MON NIGHT...NW 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 E 1 foot at
7 seconds.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW
1 foot at 5 seconds and E 1 foot at 9 seconds.
.TUE NIGHT THROUGH WED NIGHT...W winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Rain 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.

$$

ANZ254-222200-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
405 AM EST Sat Nov 22 2025

.TODAY...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft
at 4 seconds and SE 2 ft at 6 seconds. Patchy fog. Rain likely.
Vsby 1 NM or less this morning.
.TONIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and E 2 ft at
7 seconds.
.SUN...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: NE 2 ft at 6 seconds and SE 2 ft at
7 seconds.
.SUN NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 4 ft. Wave Detail: W 2 ft at 4 seconds and SE
2 ft at 7 seconds. Scattered showers in the evening.
.MON...NW winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: NW 3 ft
at 4 seconds and SW 2 ft at 7 seconds.
.MON NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 5 ft. Wave Detail: NW 3 ft at 6 seconds and E
1 foot at 9 seconds.
.TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE NIGHT AND WED...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. Rain likely.
.WED NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. Rain 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.

$$

ANZ255-222200-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
405 AM EST Sat Nov 22 2025

.TODAY...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 5 seconds and E 2 ft at 7 seconds. Patchy fog. Rain likely.
Vsby 1 NM or less this morning.
.TONIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and E 2 ft at
7 seconds.
.SUN...NW winds around 5 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 2 to 4 ft. Wave Detail: W 2 ft at 3 seconds and
SE 2 ft at 7 seconds.
.SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and NE 1 foot at
4 seconds. Scattered showers in the evening.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 3 to 5 ft. Wave Detail: W 5 ft at 6 seconds and E
1 foot at 7 seconds.
.MON NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 to 4 ft. Wave Detail: W 4 ft at 6 seconds
and N 1 foot at 5 seconds.
.TUE...SW winds 10 to 15 kt. Seas around 2 ft.
.TUE NIGHT THROUGH WED NIGHT...W winds 15 to 20 kt. Seas 3 to
5 ft. Rain 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.

$$

ANZ256-222200-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
405 AM EST Sat Nov 22 2025

.TODAY...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft
at 4 seconds and E 2 ft at 7 seconds. Rain likely. Patchy fog
this morning with vsby 1 to 3 NM.
.TONIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and E 2 ft at
7 seconds.
.SUN...NW winds around 5 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and S
2 ft at 7 seconds.
.SUN NIGHT...W winds 15 to 20 kt, becoming NW 20 to 25 kt after
midnight. Seas 3 to 5 ft. Wave Detail: SW 3 ft at 5 seconds and E
1 foot at 7 seconds. Scattered showers in the evening.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and E
1 foot at 7 seconds.
.MON NIGHT...NW winds 15 to 20 kt, diminishing to around 10 kt
after midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds
and SW 2 ft at 7 seconds.
.TUE...SW winds 10 to 15 kt. Seas around 2 ft.
.TUE NIGHT THROUGH WED NIGHT...W winds 15 to 20 kt. Seas 3 to
5 ft. Rain 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.

$$

ANZ232-222200-
Nantucket Sound-
405 AM EST Sat Nov 22 2025

.TODAY...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N
1 foot at 2 seconds and SW 1 foot at 5 seconds. Patchy fog. Rain
likely. Vsby 1 NM or less this morning.
.TONIGHT...N winds 10 to 15 kt. Seas around 2 ft. Wave Detail: N
1 foot at 3 seconds and SE 1 foot at 7 seconds.
.SUN...W winds around 5 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at
7 seconds.
.SUN NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after
midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SW
2 ft at 7 seconds. Scattered showers in the evening.
.MON AND MON NIGHT...NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave
Detail: W 2 ft at 5 seconds and N 1 foot at 5 seconds.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and N 1 foot at 4 seconds.
.TUE NIGHT THROUGH WED NIGHT...W winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Rain 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.

$$

ANZ233-222200-
Vineyard Sound-
405 AM EST Sat Nov 22 2025

.TODAY...N winds 5 to 10 kt. Seas around 2 ft this morning, then
1 foot or less. Wave Detail: SW 1 foot at 5 seconds and E 1 foot
at 6 seconds, becoming N 1 foot at 3 seconds and E 1 foot at
6 seconds. Patchy fog. Rain likely, mainly this morning with vsby
1 to 3 NM.
.TONIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
N 1 foot at 3 seconds and S 1 foot at 7 seconds.
.SUN...NW winds around 5 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at
7 seconds.
.SUN NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and
SW 2 ft at 4 seconds. Scattered showers in the evening.
.MON AND MON NIGHT...NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave
Detail: W 3 ft at 5 seconds and N 1 foot at 4 seconds.
.TUE...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 4 seconds and N 1 foot at 4 seconds.
.TUE NIGHT THROUGH WED NIGHT...W winds 15 to 20 kt. Seas 2 to
3 ft. Rain 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.

$$

ANZ234-222200-
Buzzards Bay-
405 AM EST Sat Nov 22 2025

.TODAY...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW
1 foot at 5 seconds and E 1 foot at 6 seconds. Patchy fog. Rain
likely, mainly this morning with vsby 1 to 3 NM.
.TONIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
N 1 foot at 3 seconds and S 1 foot at 7 seconds.
.SUN...NW winds around 5 kt, becoming SW in the afternoon. Seas
1 foot or less, then around 2 ft in the afternoon. Wave Detail: N
1 foot at 3 seconds and S 1 foot at 7 seconds, becoming SW 1 foot
at 3 seconds and N 1 foot at 4 seconds.
.SUN NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and
SW 2 ft at 7 seconds. Scattered showers in the evening.
.MON AND MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SW 2 ft at
6 seconds.
.TUE...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 3 seconds and N 1 foot at 4 seconds.
.TUE NIGHT THROUGH WED NIGHT...W winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Rain 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.

$$

ANZ235-222200-
Rhode Island Sound-
405 AM EST Sat Nov 22 2025

.TODAY...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N
1 foot at 2 seconds and SW 1 foot at 5 seconds. Rain likely,
mainly this morning. Patchy fog this morning with vsby 1 to 3 NM.
.TONIGHT...N winds 10 to 15 kt. Seas around 2 ft. Wave Detail: N
2 ft at 3 seconds and SE 1 foot at 5 seconds.
.SUN...NW winds around 5 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and
SE 2 ft at 8 seconds.
.SUN NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and W
2 ft at 4 seconds. Scattered showers in the evening.
.MON AND MON NIGHT...NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave
Detail: W 3 ft at 5 seconds and N 1 foot at 4 seconds.
.TUE...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 4 seconds and N 1 foot at 4 seconds.
.TUE NIGHT THROUGH WED NIGHT...W winds 15 to 20 kt. Seas 2 to
4 ft. Rain.

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.

$$

ANZ237-222200-
Block Island Sound-
405 AM EST Sat Nov 22 2025

.TODAY...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N
1 foot at 2 seconds and SW 1 foot at 4 seconds. Rain likely,
mainly this morning. Patchy fog this morning.
.TONIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave
Detail: N 2 ft at 3 seconds and E 1 foot at 6 seconds.
.SUN...NW winds around 5 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and
SE 2 ft at 7 seconds.
.SUN NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after
midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE
2 ft at 7 seconds.
.MON AND MON NIGHT...NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave
Detail: NW 2 ft at 3 seconds and E 1 foot at 7 seconds.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and SE 1 foot at 9 seconds.
.TUE NIGHT AND WED...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. Rain.
.WED NIGHT...W winds around 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. A chance of rain.

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.

$$

ANZ230-222200-
Boston Harbor-
405 AM EST Sat Nov 22 2025

.TODAY...NW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft this afternoon. A chance of rain, mainly this morning.
.TONIGHT...NW winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Waves around 2 ft in
the evening, then 1 foot or less.
.SUN...W winds 5 to 10 kt, becoming SW in the afternoon. Waves
1 foot or less.
.SUN NIGHT...SW winds 5 to 10 kt, becoming W 10 to 15 kt after
midnight. Waves 1 foot or less, then around 2 ft after midnight.
.MON AND MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.TUE...SW winds 5 to 10 kt. Waves 1 foot or less.
.TUE NIGHT AND WED...SW winds 10 to 15 kt. Waves around 2 ft.
Rain.
.WED NIGHT...W winds 10 to 15 kt. Waves around 2 ft. A chance of
rain.

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.

$$

ANZ236-222200-
Narragansett Bay-
405 AM EST Sat Nov 22 2025

.TODAY...N winds 5 to 10 kt. Waves 1 foot or less. Rain likely,
mainly this morning. Patchy fog this morning with vsby 1 to 3 NM.
.TONIGHT...N winds 5 to 10 kt. Waves 1 foot or less.
.SUN...NW winds around 5 kt, becoming SW in the afternoon. Waves
1 foot or less, then around 2 ft in the afternoon.
.SUN NIGHT...W winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. Waves around 2 ft. Scattered
showers in the evening.
.MON AND MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.TUE...SW winds 5 to 10 kt. Waves around 2 ft.
.TUE NIGHT AND WED...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 4 ft. Rain.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves
2 to 4 ft. A chance of rain.

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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