907
FZUS51 KBOX 191203
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
703 AM EST Wed Nov 19 2025

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

ANZ200-200100-
703 AM EST Wed Nov 19 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Weak low pressure system passes south of the waters this morning
with high pressure moving into the waters late today and Thursday,
resulting in light winds. A cold front approaches from the Great
Lakes Friday and moves south of the waters Friday night into
Saturday. Rain showers possible. High pressure returns Sunday into
early next week.

$$

ANZ250-200100-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
703 AM EST Wed Nov 19 2025

.TODAY...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W
2 ft at 4 seconds and E 1 foot at 11 seconds.
.TONIGHT...N winds around 5 kt. Seas 1 foot or less. Wave Detail:
NW 1 foot at 3 seconds and E 1 foot at 11 seconds.
.THU...NE winds around 5 kt. Seas 1 foot or less. Wave Detail: NW
1 foot at 2 seconds and E 1 foot at 11 seconds.
.THU NIGHT...SE winds around 5 kt, becoming SW after midnight.
Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and NE
1 foot at 6 seconds.
.FRI...SW 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: SW
2 ft at 3 seconds and E 1 foot at 7 seconds.
.FRI NIGHT...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 1 foot at
7 seconds. A chance of rain.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up 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.

$$

ANZ251-200100-
Massachusetts Bay and Ipswich Bay-
703 AM EST Wed Nov 19 2025

.TODAY...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
NW 1 foot at 3 seconds and NE 1 foot at 10 seconds.
.TONIGHT...N winds around 5 kt. Seas 1 foot or less. Wave Detail:
NW 1 foot at 2 seconds and NE 1 foot at 8 seconds.
.THU...NE winds around 5 kt. Seas 1 foot or less. Wave Detail: NW
1 foot at 2 seconds and NE 1 foot at 7 seconds.
.THU NIGHT...SE winds around 5 kt, becoming SW after midnight.
Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and NE
1 foot at 5 seconds.
.FRI...SW 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: SW 1 foot at 2 seconds and NE 1 foot at
6 seconds, becoming SW 2 ft at 3 seconds and E 1 foot at
8 seconds.
.FRI NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 3 seconds and E 1 foot at 8 seconds. A chance of rain.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt. 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.

$$

ANZ231-200100-
Cape Cod Bay-
703 AM EST Wed Nov 19 2025

.TODAY...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
NW 1 foot at 4 seconds and NE 1 foot at 7 seconds.
.TONIGHT...N winds around 5 kt. Seas 1 foot or less. Wave Detail:
N 1 foot at 3 seconds and NE 1 foot at 8 seconds.
.THU...NE winds around 5 kt. Seas 1 foot or less. Wave Detail: N
1 foot at 3 seconds and NE 1 foot at 6 seconds.
.THU NIGHT...NE winds around 5 kt, becoming W after midnight.
Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds.
.FRI...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: SW 1 foot at 3 seconds and E
1 foot at 4 seconds, becoming SW 1 foot at 2 seconds and E 1 foot
at 4 seconds.
.FRI NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 3 seconds and E 1 foot at 6 seconds. A chance of
rain.
.SAT...NW winds 10 to 15 kt. Seas around 2 ft. A chance of rain.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. 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.

$$

ANZ254-200100-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
703 AM EST Wed Nov 19 2025

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

$$

ANZ255-200100-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
703 AM EST Wed Nov 19 2025

.TODAY...NW winds 5 to 10 kt, becoming N this afternoon. Seas
2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and S 1 foot at
8 seconds. A slight chance of showers this morning.
.TONIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 5 seconds and NE 1 foot at 8 seconds.
.THU...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE
2 ft at 6 seconds and SW 2 ft at 7 seconds.
.THU NIGHT...NE winds around 5 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds.
.FRI...SW 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: S 2 ft
at 6 seconds.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 2 ft at
6 seconds. A chance of rain after midnight.
.SAT...N winds 10 to 15 kt. Seas 2 to 4 ft. A chance of rain.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 10 to 15 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.

$$

ANZ256-200100-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
703 AM EST Wed Nov 19 2025

.TODAY...N winds around 5 kt. Seas around 2 ft. Wave Detail: NW
2 ft at 4 seconds and S 1 foot at 9 seconds. A chance of showers
this morning.
.TONIGHT...NE winds 5 to 10 kt. Seas around 2 ft in the evening,
then 1 foot or less. Wave Detail: SW 1 foot at 4 seconds and NE
1 foot at 8 seconds, becoming SW 1 foot at 6 seconds and NE
1 foot at 6 seconds.
.THU...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE
2 ft at 6 seconds and SW 2 ft at 6 seconds.
.THU NIGHT...NE winds around 5 kt, becoming W after midnight.
Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds.
.FRI...SW 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
3 ft at 4 seconds and SE 1 foot at 7 seconds.
.FRI NIGHT...W winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: SW
3 ft at 4 seconds and SE 1 foot at 7 seconds. A chance of rain.
.SAT...N winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain.
.SAT NIGHT THROUGH SUN NIGHT...W winds 10 to 15 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.

$$

ANZ232-200100-
Nantucket Sound-
703 AM EST Wed Nov 19 2025

.TODAY...NW winds 5 to 10 kt, becoming N this afternoon. Seas
around 2 ft this morning, then 1 foot or less. Wave Detail: W
1 foot at 3 seconds and SE 1 foot at 8 seconds, becoming NW
1 foot at 3 seconds and SE 1 foot at 10 seconds.
.TONIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
W 1 foot at 4 seconds and NE 1 foot at 10 seconds.
.THU...NE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE
1 foot at 3 seconds and SW 1 foot at 5 seconds.
.THU NIGHT...NE winds around 5 kt, becoming NW around 5 kt after
midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at
5 seconds and E 1 foot at 5 seconds.
.FRI...SW 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: S 1 foot at 6 seconds, becoming SW 2 ft
at 3 seconds and SE 1 foot at 6 seconds.
.FRI NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 4 seconds and E 1 foot at 6 seconds. A chance of rain.
.SAT...NW winds 10 to 15 kt. Seas around 2 ft. A chance of rain.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 10 to 15 kt. 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.

$$

ANZ233-200100-
Vineyard Sound-
703 AM EST Wed Nov 19 2025

.TODAY...N winds around 5 kt. Seas 1 foot or less. Wave Detail:
SW 1 foot at 6 seconds.
.TONIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
SW 1 foot at 5 seconds.
.THU...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE
1 foot at 3 seconds and SW 1 foot at 5 seconds.
.THU NIGHT...NE winds around 5 kt, becoming W after midnight.
Seas 1 foot or less. Wave Detail: S 1 foot at 5 seconds.
.FRI...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft
in the afternoon. Wave Detail: S 1 foot at 6 seconds, becoming SW
2 ft at 3 seconds and SE 1 foot at 6 seconds.
.FRI NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE
1 foot at 7 seconds. A chance of rain after midnight.
.SAT...N winds around 10 kt. Seas around 2 ft. A chance of rain.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. 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.

$$

ANZ234-200100-
Buzzards Bay-
703 AM EST Wed Nov 19 2025

.TODAY...NW winds around 5 kt. Seas 1 foot or less. Wave Detail:
SW 1 foot at 6 seconds.
.TONIGHT...N winds around 5 kt. Seas 1 foot or less. Wave Detail:
SW 1 foot at 5 seconds and NE 1 foot at 5 seconds.
.THU...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE
1 foot at 3 seconds and SW 1 foot at 5 seconds.
.THU NIGHT...N winds around 5 kt, becoming W after midnight. Seas
1 foot or less. Wave Detail: S 1 foot at 5 seconds.
.FRI...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: S 1 foot at 6 seconds,
becoming SW 2 ft at 3 seconds and SE 1 foot at 6 seconds.
.FRI NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 4 seconds and SE 1 foot at 7 seconds. A chance of rain
after midnight.
.SAT...N winds around 10 kt. Seas around 2 ft. A chance of rain.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. 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.

$$

ANZ235-200100-
Rhode Island Sound-
703 AM EST Wed Nov 19 2025

.TODAY...N winds around 5 kt. Seas around 2 ft this morning, then
1 foot or less. Wave Detail: W 1 foot at 5 seconds and S 1 foot
at 8 seconds, becoming SW 1 foot at 6 seconds. A slight chance of
showers this morning.
.TONIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
S 1 foot at 6 seconds.
.THU...NE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: NE 1 foot at 4 seconds and SW
1 foot at 6 seconds, becoming NE 2 ft at 6 seconds and S 2 ft at
6 seconds.
.THU NIGHT...NE winds around 5 kt, becoming W around 5 kt after
midnight. Seas around 2 ft in the evening, then 1 foot or less.
Wave Detail: S 2 ft at 6 seconds, becoming S 1 foot at 6 seconds.
.FRI...SW 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: S 3 ft
at 5 seconds.
.FRI NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE
1 foot at 7 seconds. A chance of rain after midnight.
.SAT...N winds 10 to 15 kt. Seas around 2 ft. A chance of rain.
.SAT NIGHT THROUGH SUN NIGHT...W winds 10 to 15 kt. 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.

$$

ANZ237-200100-
Block Island Sound-
703 AM EST Wed Nov 19 2025

.TODAY...N winds around 5 kt. Seas 1 foot or less. Wave Detail: W
1 foot at 4 seconds and S 1 foot at 8 seconds. A slight chance of
showers this morning.
.TONIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
SW 1 foot at 4 seconds and E 1 foot at 7 seconds.
.THU...NE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE
1 foot at 4 seconds and S 1 foot at 6 seconds.
.THU NIGHT...N winds around 5 kt, becoming W after midnight. Seas
1 foot or less. Wave Detail: S 1 foot at 6 seconds.
.FRI...SW 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: S 2 ft
at 5 seconds.
.FRI 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 4 seconds and SE
1 foot at 6 seconds. A chance of rain after midnight.
.SAT...N winds around 10 kt. Seas around 2 ft. A chance of rain.
.SAT NIGHT THROUGH SUN NIGHT...W winds 5 to 10 kt. 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.

$$

ANZ230-200100-
Boston Harbor-
703 AM EST Wed Nov 19 2025

.TODAY...NW winds 5 to 10 kt. Waves 1 foot or less.
.TONIGHT...NW winds around 5 kt. Waves 1 foot or less.
.THU...N winds around 5 kt. Waves 1 foot or less.
.THU NIGHT...SE winds around 5 kt, becoming SW after midnight.
Waves 1 foot or less.
.FRI...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Waves 1 foot or less, then around 2 ft in the
afternoon.
.FRI NIGHT...SW winds 10 to 15 kt. Waves around 2 ft. A chance of
rain.
.SAT THROUGH SUN NIGHT...SW winds 5 to 10 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.

$$

ANZ236-200100-
Narragansett Bay-
703 AM EST Wed Nov 19 2025

.TODAY...N winds around 5 kt. Waves 1 foot or less.
.TONIGHT...N winds around 5 kt. Waves 1 foot or less.
.THU...N winds around 5 kt. Waves 1 foot or less.
.THU NIGHT...N winds around 5 kt, becoming W after midnight.
Waves 1 foot or less.
.FRI...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Waves 1 foot or less, then around
2 ft in the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after
midnight. Waves around 2 ft. A chance of rain after midnight.
.SAT...N winds 5 to 10 kt. Waves around 2 ft. A chance of rain.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 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.

$$

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