117
FZUS51 KBOX 192105
CWFBOX

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

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

ANZ200-201000-
404 PM EST Wed Nov 19 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres will remain over New England Thu before heading to the
Maritimes. A cold front will approach the waters from the Great
Lakes Fri before moving offshore Sat. High pres will build back into
the region early next week.

$$

ANZ250-201000-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
404 PM EST Wed Nov 19 2025

.TONIGHT...N winds around 5 kt. Seas 1 foot or less. Wave Detail:
NW 1 foot at 3 seconds and E 1 foot at 12 seconds.
.THU...NE winds around 5 kt. Seas 1 foot or less. Wave Detail: N
1 foot at 3 seconds and E 1 foot at 12 seconds.
.THU NIGHT...E winds around 5 kt, becoming SW after midnight.
Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S
1 foot at 8 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 NE 1 foot at 3 seconds.
.FRI NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at
7 seconds. A chance of rain.
.SAT...W winds around 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: W 3 ft at 4 seconds and E 2 ft at 7 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 2 to 3 ft.
.SUN THROUGH MON NIGHT...W winds 15 to 20 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.

$$

ANZ251-201000-
Massachusetts Bay and Ipswich Bay-
404 PM EST Wed Nov 19 2025

.TONIGHT...N winds around 5 kt. Seas 1 foot or less. Wave Detail:
N 1 foot at 3 seconds and E 1 foot at 12 seconds.
.THU...NE winds around 5 kt. Seas 1 foot or less. Wave Detail: N
1 foot at 2 seconds and E 1 foot at 12 seconds.
.THU NIGHT...SE winds around 5 kt, becoming SW after midnight.
Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S
1 foot at 7 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
3 seconds, becoming SW 2 ft at 3 seconds and E 1 foot at
3 seconds.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at
7 seconds. A chance of rain.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: W 2 ft at 3 seconds and E 2 ft at 7 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.
.SUN THROUGH MON NIGHT...W winds 10 to 15 kt with gusts up to
20 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.

$$

ANZ231-201000-
Cape Cod Bay-
404 PM EST Wed Nov 19 2025

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

$$

ANZ254-201000-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
404 PM EST Wed Nov 19 2025

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

$$

ANZ255-201000-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
404 PM EST Wed Nov 19 2025

.TONIGHT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N
1 foot at 3 seconds and SW 1 foot at 5 seconds.
.THU...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 7 seconds and NE 1 foot at 2 seconds.
.THU NIGHT...N winds around 5 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 7 seconds and N 1 foot at 3 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
2 ft at 3 seconds and SE 2 ft at 6 seconds.
.FRI NIGHT...SW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail:
SW 3 ft at 5 seconds and E 2 ft at 6 seconds. A chance of rain
after midnight.
.SAT...NW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft
at 6 seconds and E 2 ft at 7 seconds. A chance of rain.
.SAT NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.
.SUN THROUGH MON NIGHT...W winds 15 to 20 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.

$$

ANZ256-201000-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
404 PM EST Wed Nov 19 2025

.TONIGHT...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.
.THU...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 7 seconds and NE 1 foot at 3 seconds.
.THU NIGHT...NE winds around 5 kt, becoming W after midnight.
Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and NE 1 foot
at 3 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: SE 1 foot at 7 seconds, becoming S
2 ft at 5 seconds.
.FRI NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
around 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at
6 seconds. A chance of rain.
.SAT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: W 4 ft at 5 seconds and SE 3 ft at 7 seconds.
A chance of rain.
.SAT NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.
.SUN THROUGH MON NIGHT...W 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.

$$

ANZ232-201000-
Nantucket Sound-
404 PM EST Wed Nov 19 2025

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

$$

ANZ233-201000-
Vineyard Sound-
404 PM EST Wed Nov 19 2025

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

$$

ANZ234-201000-
Buzzards Bay-
404 PM EST Wed Nov 19 2025

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

$$

ANZ235-201000-
Rhode Island Sound-
404 PM EST Wed Nov 19 2025

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

$$

ANZ237-201000-
Block Island Sound-
404 PM EST Wed Nov 19 2025

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

$$

ANZ230-201000-
Boston Harbor-
404 PM EST Wed Nov 19 2025

.TONIGHT...N 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 W after midnight.
Waves 1 foot or less.
.FRI...SW winds 5 to 10 kt. 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...W winds 10 to 15 kt. Waves around 2 ft. A chance of rain
in the morning.
.SAT NIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Waves around 2 ft in the evening, then 1 foot or
less.
.SUN THROUGH MON NIGHT...W winds 10 to 15 kt with gusts up 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.

$$

ANZ236-201000-
Narragansett Bay-
404 PM EST Wed Nov 19 2025

.TONIGHT...N winds around 5 kt. Waves 1 foot or less.
.THU...N winds around 5 kt. Waves 1 foot or less.
.THU NIGHT...NE winds around 5 kt, becoming NW 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...NW winds around 10 kt. Waves around 2 ft. A chance of
rain.
.SAT NIGHT...N winds 5 to 10 kt. Waves around 2 ft.
.SUN THROUGH MON NIGHT...W winds 10 to 15 kt with gusts up 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.

$$

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