819
FZUS51 KBOX 220604
CWFBOX

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

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

ANZ200-221900-
104 AM EST Sat Nov 22 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pressure moves south of the waters into tonight. Cold front
moves through tonight which may bring showers to the southern
waters. High pres returns late Saturday and remains through early
next week. High pres moves offshore Tuesday. Rain possible late
Tuesday into Thursday with a frontal system.

$$

ANZ250-221900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 2 ft at
7 seconds. A slight chance of rain.
.SAT...NW winds 10 to 15 kt. Gusts up to 20 kt in the 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 in the morning.
.SAT NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 to 3 ft. Wave Detail: NW 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: NW 2 ft
at 4 seconds and E 1 foot at 7 seconds.
.SUN NIGHT THROUGH MON NIGHT...NW winds 15 to 20 kt. Seas 2 to
4 ft. Wave Detail: NW 3 ft at 4 seconds and E 1 foot at
7 seconds.
.TUE...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft
at 3 seconds and SE 1 foot at 3 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.

$$

ANZ251-221900-
Massachusetts Bay and Ipswich Bay-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot
at 7 seconds. A slight chance of rain.
.SAT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SE
2 ft at 6 seconds and W 1 foot at 2 seconds. A chance of rain in
the morning.
.SAT NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and
E 2 ft at 7 seconds.
.SUN...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW
2 ft at 3 seconds and NE 1 foot at 6 seconds.
.SUN NIGHT THROUGH MON NIGHT...W winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE
1 foot at 7 seconds.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W
1 foot at 3 seconds and SE 1 foot at 3 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.

$$

ANZ231-221900-
Cape Cod Bay-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 1 foot at 4 seconds and E 1 foot at 7 seconds. A
slight chance of rain.
.SAT...NW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 1 foot or less, then around 2 ft in the
afternoon. Wave Detail: NW 1 foot at 3 seconds and S 1 foot at
5 seconds. Rain likely, mainly in the morning. Patchy fog in the
morning with vsby 1 to 3 NM.
.SAT NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and
S 1 foot at 4 seconds.
.SUN...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft
at 5 seconds and S 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 5 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
6 seconds.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft.
.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.

$$

ANZ254-221900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at
7 seconds. A slight chance of rain. Vsby 1 to 3 NM.
.SAT...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft
at 3 seconds and E 2 ft at 7 seconds. Patchy fog. Rain likely.
Vsby 1 NM or less in the morning.
.SAT NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: NW 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: NW 2 ft at 5 seconds and NE 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 NE
2 ft at 6 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.
.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.

$$

ANZ255-221900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SW 2 ft at 5 seconds and E 2 ft at 6 seconds. Patchy fog.
A chance of rain. Vsby 1 to 3 NM.
.SAT...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the 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 in the morning.
.SAT NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: NW 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 3 ft at 4 seconds and
NE 2 ft at 6 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 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 5 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.
.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.

$$

ANZ256-221900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SW 2 ft at 5 seconds and E 2 ft at 7 seconds. A chance of
rain.
.SAT...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 4 seconds and E 2 ft at 7 seconds. Rain likely. Patchy
fog in the morning with vsby 1 to 3 NM.
.SAT NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: NW 3 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 3 ft. Wave Detail: W 3 ft at 4 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: W 3 ft at 4 seconds and SW
3 ft 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 3 ft at 5 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.
.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.

$$

ANZ232-221900-
Nantucket Sound-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 1 foot at 4 seconds and E 1 foot at 6 seconds. Patchy
fog. A chance of rain. Vsby 1 NM or less.
.SAT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 4 seconds and E 1 foot at 7 seconds. Patchy fog. Rain
likely. Vsby 1 NM or less in the morning.
.SAT NIGHT...N winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
NW 2 ft at 3 seconds and E 1 foot at 7 seconds.
.SUN...W winds around 5 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: W 2 ft at 3 seconds and NE 1 foot at
6 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 6 seconds. Scattered showers in the evening.
.MON AND MON NIGHT...NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave
Detail: NW 2 ft at 3 seconds and SW 2 ft at 6 seconds.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft.
.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.

$$

ANZ233-221900-
Vineyard Sound-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 2 ft at 5 seconds and E 1 foot at 6 seconds. A chance
of rain. Vsby 1 to 3 NM.
.SAT...N winds 5 to 10 kt. Seas around 2 ft in the 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 SW 1 foot at
4 seconds. Patchy fog. Rain likely, mainly in the morning with
vsby 1 to 3 NM.
.SAT NIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: NW 1 foot at 3 seconds and S 1 foot at 6 seconds.
.SUN...NW winds around 5 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at
6 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 2 ft at 4 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 E 1 foot 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 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.

$$

ANZ234-221900-
Buzzards Bay-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 1 foot at 5 seconds and E 1 foot at 6 seconds. A
chance of rain. Vsby 1 to 3 NM.
.SAT...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 in the morning with vsby 1 to 3 NM.
.SAT NIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: NW 1 foot at 2 seconds and S 1 foot at 4 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:
NW 1 foot at 3 seconds and NE 1 foot at 6 seconds, becoming SW
2 ft at 3 seconds and S 1 foot at 7 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: NW 2 ft at 3 seconds and SW 2 ft at
6 seconds.
.TUE...SW winds 10 to 15 kt. Seas around 2 ft.
.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.

$$

ANZ235-221900-
Rhode Island Sound-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 2 ft at 5 seconds and SE 1 foot at 6 seconds. A chance
of rain.
.SAT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 4 seconds and SE 1 foot at 6 seconds. Rain likely,
mainly in the morning. Patchy fog in the morning with vsby 1 to
3 NM.
.SAT NIGHT...N winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
NW 2 ft at 3 seconds and S 1 foot at 4 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 4 seconds and S
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: S 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 E 1 foot 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 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.

$$

ANZ237-221900-
Block Island Sound-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 1 foot at 4 seconds and SE 1 foot at 6 seconds. A
chance of rain.
.SAT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W
1 foot at 3 seconds and SE 1 foot at 6 seconds. Rain likely,
mainly in the morning. Patchy fog in the morning.
.SAT NIGHT...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: NW 1 foot 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: W 2 ft at 3 seconds and S
2 ft at 7 seconds.
.SUN NIGHT THROUGH MON NIGHT...NW winds 15 to 20 kt. Seas 2 to
3 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 8 seconds.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and SW 1 foot at 6 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.

$$

ANZ230-221900-
Boston Harbor-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Waves 1 foot or less. A
slight chance of rain.
.SAT...NW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon. A chance of rain in the morning.
.SAT NIGHT...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 THROUGH 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.

$$

ANZ236-221900-
Narragansett Bay-
104 AM EST Sat Nov 22 2025

.REST OF TONIGHT...W winds around 5 kt. Waves 1 foot or less. A
chance of rain. Vsby 1 to 3 NM.
.SAT...N winds 5 to 10 kt. Waves 1 foot or less. Rain likely,
mainly in the morning. Patchy fog in the morning with vsby 1 to
3 NM.
.SAT NIGHT...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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