260
FZUS51 KBOX 222304
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
703 PM EDT Thu May 22 2025

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

ANZ200-231200-
703 PM EDT Thu May 22 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
A developing gale center passes just inside the Benchmark
later today and tonight. This will bring E-NE gales to the MA and RI
waters, along with dangerous seas later today and tonight. Improving
weather conditions Fri, and especially over this weekend, as this
storm weakens and drifts into the Maritimes. High pres expected over
the waters early next week.

$$

ANZ250-231200-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT THROUGH FRIDAY MORNING...

.TONIGHT...NE winds 25 to 30 kt with gusts up to 45 kt. Seas
10 to 14 ft. Wave Detail: E 14 ft at 9 seconds and NW 1 foot at
4 seconds. Rain. A slight chance of tstms this evening. Vsby 1 NM
or less.
.FRI...NW winds 20 to 25 kt with gusts up to 35 kt, becoming W
15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 9 to
13 ft, subsiding to 6 to 9 ft in the afternoon. Wave Detail: E
13 ft at 10 seconds and W 2 ft at 6 seconds, becoming E 9 ft at
10 seconds and N 4 ft at 6 seconds. Rain likely in the morning
with vsby 1 to 3 NM.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 5 to 7 ft, subsiding to
4 to 5 ft after midnight. Wave Detail: E 6 ft at 9 seconds and N
2 ft at 6 seconds, becoming E 5 ft at 9 seconds and NW 1 foot at
5 seconds. A chance of showers.
.SAT...W winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at
9 seconds and SW 1 foot at 5 seconds. A chance of showers in the
morning.
.SAT NIGHT THROUGH SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to
3 ft. Wave Detail: E 3 ft at 9 seconds and W 2 ft at 3 seconds.
.MON THROUGH TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.
Wave Detail: S 2 ft at 3 seconds and E 1 foot at 8 seconds.

Winds and seas higher in and near tstms.

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.

$$

ANZ251-231200-
Massachusetts Bay and Ipswich Bay-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT THROUGH FRIDAY MORNING...

.TONIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 8 to
11 ft. Wave Detail: E 11 ft at 10 seconds and NW 2 ft at
5 seconds. Rain. A slight chance of tstms this evening. Vsby 1 to
3 NM.
.FRI...NW winds 20 to 25 kt with gusts up to 35 kt, diminishing
to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 7 to
10 ft, subsiding to 5 to 7 ft in the afternoon. Wave Detail: E
10 ft at 10 seconds and NW 2 ft at 5 seconds, becoming E 7 ft at
10 seconds and NW 2 ft at 6 seconds. Rain likely in the morning,
then a chance of showers in the afternoon. Vsby 1 to 3 NM in the
morning.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: E
6 ft at 9 seconds and NW 1 foot at 5 seconds. A chance of
showers.
.SAT...W winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at
9 seconds and SW 1 foot at 5 seconds. A chance of showers in the
morning.
.SAT NIGHT THROUGH SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to
3 ft. Wave Detail: E 3 ft at 9 seconds and W 1 foot at 4 seconds.
.MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft.
Wave Detail: NW 1 foot at 2 seconds and E 1 foot at 8 seconds.

Winds and seas higher in and near tstms.

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.

$$

ANZ231-231200-
Cape Cod Bay-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...NE winds 25 to 30 kt with gusts up to 45 kt, becoming
N 20 to 25 kt with gusts up to 35 kt after midnight. Seas 5 to
8 ft. Wave Detail: N 6 ft at 5 seconds. Rain with a slight chance
of tstms this evening, then rain after midnight. Vsby 1 NM or
less.
.FRI...W winds 20 to 25 kt with gusts up to 30 kt, diminishing to
10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 5 to
7 ft, subsiding to 3 to 5 ft in the afternoon. Wave Detail: NE
6 ft at 9 seconds and NW 4 ft at 5 seconds, becoming NE 5 ft at
9 seconds and NW 3 ft at 6 seconds. A chance of rain in the
morning with vsby 1 to 3 NM.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: NE
4 ft at 8 seconds and NW 2 ft at 5 seconds. A chance of showers
in the evening.
.SAT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft
at 7 seconds and W 1 foot at 3 seconds. A chance of showers in
the morning.
.SAT NIGHT THROUGH SUN NIGHT...W winds 5 to 10 kt. Seas around
2 ft. Wave Detail: E 2 ft at 8 seconds and W 1 foot at 3 seconds.
.MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 7 seconds.

Winds and seas higher in and near tstms.

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.

$$

ANZ254-231200-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...E winds 30 to 40 kt with gusts up to 55 kt, becoming
SW 20 to 25 kt with gusts up to 40 kt after midnight. Seas 9 to
13 ft. Wave Detail: E 13 ft at 9 seconds and NW 2 ft at
6 seconds. Rain with a slight chance of tstms this evening, then
a chance of rain after midnight. Vsby 1 NM or less.
.FRI...W winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 7 to 10 ft, subsiding to 5 to
8 ft in the afternoon. Wave Detail: E 10 ft at 10 seconds and W
4 ft at 5 seconds, becoming E 8 ft at 9 seconds and W 3 ft at
6 seconds. A chance of rain in the morning with vsby 1 NM or
less.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: E
5 ft at 9 seconds and W 3 ft at 6 seconds. A chance of showers in
the evening.
.SAT...W winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at
8 seconds and SW 3 ft at 7 seconds.
.SAT NIGHT...W winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: SW
3 ft at 7 seconds and E 3 ft at 9 seconds.
.SUN AND SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 4 ft. Wave
Detail: NW 2 ft at 5 seconds and E 2 ft at 9 seconds.
.MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ255-231200-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...NE winds 25 to 30 kt with gusts up to 45 kt, becoming
W with gusts up to 35 kt after midnight. Seas 8 to 11 ft. Wave
Detail: E 11 ft at 8 seconds and NW 6 ft at 6 seconds. Rain with
a slight chance of tstms this evening, then a chance of rain
after midnight. Vsby 1 NM or less.
.FRI...W winds 20 to 25 kt with gusts up to 30 kt, diminishing to
15 to 20 kt in the afternoon. Seas 5 to 8 ft. Wave Detail: E 7 ft
at 9 seconds and W 6 ft at 6 seconds.
.FRI NIGHT...W winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E
4 ft at 9 seconds and W 3 ft at 6 seconds.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft. Wave Detail: SW 4 ft at 7 seconds and E 3 ft at 8 seconds.
.SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 7 seconds and E
2 ft at 8 seconds.
.SUN AND SUN NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. Wave
Detail: W 3 ft at 6 seconds and E 2 ft at 9 seconds.
.MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ256-231200-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...N winds 25 to 30 kt, becoming NW after midnight. Gusts
up to 40 kt. Seas 7 to 10 ft. Wave Detail: NE 10 ft at 8 seconds
and NW 6 ft at 5 seconds. Rain, mainly this evening. Vsby 1 NM or
less, increasing to 1 to 3 NM after midnight.
.FRI...W winds 20 to 25 kt with gusts up to 30 kt, diminishing to
10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 5 to
7 ft. Wave Detail: E 6 ft at 9 seconds and NW 5 ft at 5 seconds.
.FRI NIGHT...W winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E
4 ft at 9 seconds and W 3 ft at 6 seconds.
.SAT...W winds around 15 kt with gusts up to 20 kt. Seas 4 to
5 ft. Wave Detail: SW 4 ft at 7 seconds and E 3 ft at 9 seconds.
.SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 5 ft. Wave Detail: W 4 ft at 7 seconds and E
2 ft at 8 seconds.
.SUN AND SUN NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave
Detail: W 3 ft at 6 seconds and E 2 ft at 8 seconds.
.MON THROUGH TUE NIGHT...SE winds 5 to 10 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.

$$

ANZ232-231200-
Nantucket Sound-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...E winds 25 to 35 kt with gusts up to 45 kt, becoming
NW 20 to 25 kt with gusts up to 30 kt after midnight. Seas 5 to
7 ft. Wave Detail: E 7 ft at 7 seconds and NW 3 ft at 6 seconds.
Rain. A slight chance of tstms this evening. Vsby 1 NM or less.
.FRI...W winds 20 to 25 kt with gusts up to 30 kt, diminishing to
10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 4 to
6 ft. Wave Detail: W 4 ft at 4 seconds and E 4 ft at 10 seconds.
A chance of rain in the morning with vsby 1 to 3 NM.
.FRI NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: W
2 ft at 4 seconds and E 2 ft at 9 seconds. A chance of showers in
the evening.
.SAT...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and E 2 ft at
9 seconds.
.SAT NIGHT THROUGH SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to
3 ft. Wave Detail: W 2 ft at 5 seconds and E 1 foot at 9 seconds.
.MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: W 1 foot at 4 seconds and E 1 foot at 9 seconds.

Winds and seas higher in and near tstms.

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.

$$

ANZ233-231200-
Vineyard Sound-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...NE winds 25 to 30 kt, becoming NW after midnight. Seas
4 to 6 ft. Wave Detail: NE 4 ft at 5 seconds and NW 3 ft at
4 seconds. Rain. A slight chance of tstms this evening. Vsby 1 NM
or less, increasing to 1 to 3 NM after midnight.
.FRI...W winds 15 to 20 kt. Gusts up to 30 kt, decreasing to
20 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: W 3 ft at
4 seconds and E 2 ft at 8 seconds.
.FRI NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 5 seconds and E 2 ft at 9 seconds. A chance of showers in
the evening.
.SAT...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and E 1 foot at
8 seconds.
.SAT NIGHT THROUGH SUN NIGHT...NW winds 10 to 15 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 7 seconds and E 1 foot at
8 seconds.
.MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: SW 1 foot at 5 seconds and SE 1 foot at 9 seconds.

Winds and seas higher in and near tstms.

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.

$$

ANZ234-231200-
Buzzards Bay-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...N winds 25 to 30 kt, becoming NW 20 to 25 kt after
midnight. Seas 4 to 6 ft. Wave Detail: N 4 ft at 5 seconds. Rain.
A slight chance of tstms this evening. Vsby 1 NM or less,
increasing to 1 to 3 NM after midnight.
.FRI...W winds 15 to 20 kt with gusts up to 30 kt, diminishing to
10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to
4 ft. Wave Detail: W 3 ft at 4 seconds and E 3 ft at 8 seconds. A
chance of rain in the morning.
.FRI NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 4 seconds and E 2 ft at 9 seconds. A chance of showers
in the evening.
.SAT...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and E 1 foot at
8 seconds.
.SAT NIGHT THROUGH SUN NIGHT...NW winds 5 to 10 kt. Seas around
2 ft. Wave Detail: SW 2 ft at 7 seconds and E 1 foot at
8 seconds.
.MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: W 1 foot at 5 seconds and E 1 foot at 8 seconds.

Winds and seas higher in and near tstms.

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.

$$

ANZ235-231200-
Rhode Island Sound-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...N winds 25 to 30 kt, becoming NW after midnight. Gusts
up to 40 kt. Seas 5 to 8 ft. Wave Detail: NE 7 ft at 7 seconds
and NW 4 ft at 4 seconds. Rain. Vsby 1 NM or less, increasing to
1 to 3 NM after midnight.
.FRI...W winds 15 to 20 kt with gusts up to 30 kt, diminishing to
10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to
5 ft. Wave Detail: W 4 ft at 4 seconds and SE 4 ft at 8 seconds.
.FRI NIGHT...W winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW
3 ft at 5 seconds and SE 3 ft at 9 seconds. A chance of showers
in the evening.
.SAT...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 3 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and SE 2 ft at
8 seconds.
.SAT NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: W
3 ft at 7 seconds and SE 1 foot at 8 seconds.
.SUN AND SUN NIGHT...NW winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: W 2 ft at 6 seconds and SE 1 foot at 8 seconds.
.MON THROUGH TUE NIGHT...S 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.

$$

ANZ237-231200-
Block Island Sound-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...N winds 25 to 30 kt, becoming NW 20 to 25 kt after
midnight. Gusts up to 40 kt. Seas 5 to 7 ft. Wave Detail: NE 6 ft
at 7 seconds and NW 3 ft at 4 seconds. Rain, mainly this evening.
Vsby 1 NM or less, increasing to 1 to 3 NM after midnight.
.FRI...W winds 10 to 15 kt. Gusts up to 25 kt in the morning.
Seas 3 to 5 ft. Wave Detail: E 5 ft at 8 seconds and W 2 ft at
4 seconds.
.FRI NIGHT...W winds around 10 kt. Seas 2 to 4 ft. Wave Detail:
SE 3 ft at 9 seconds and W 2 ft at 5 seconds.
.SAT...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 4 ft. Wave Detail: W 3 ft at 6 seconds and SE 2 ft at
8 seconds.
.SAT NIGHT THROUGH SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to
3 ft. Wave Detail: W 2 ft at 5 seconds and SE 2 ft at 8 seconds.
.MON THROUGH TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft.
Wave Detail: W 1 foot at 4 seconds and SE 1 foot at 9 seconds.

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.

$$

ANZ230-231200-
Boston Harbor-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT UNTIL 6 AM EDT FRIDAY...

.TONIGHT...N winds 25 to 30 kt with gusts up to 40 kt. Waves 2 to
3 ft, except 5 to 7 ft at the outer harbor entrance. Rain. A
slight chance of tstms this evening. Vsby 1 to 3 NM.
.FRI...NW winds 20 to 25 kt with gusts up to 30 kt, diminishing
to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves
around 2 ft, except 4 to 6 ft at the outer harbor entrance. Rain
likely in the morning, then a chance of showers in the afternoon.
Vsby 1 to 3 NM in the morning.
.FRI NIGHT...S winds 5 to 10 kt, becoming SW after midnight.
Waves 1 foot or less, except 2 to 4 ft at the outer harbor
entrance. A chance of showers.
.SAT...W winds around 10 kt. Waves 1 foot or less. A chance of
showers in the morning.
.SAT NIGHT THROUGH SUN NIGHT...W winds 5 to 10 kt. Waves 1 foot
or less.
.MON THROUGH TUE NIGHT...SW winds 5 to 10 kt. Waves 1 foot or
less.

Winds and waves higher in and near tstms.

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.

$$

ANZ236-231200-
Narragansett Bay-
703 PM EDT Thu May 22 2025

...GALE WARNING IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...N winds 20 to 25 kt with gusts up to 35 kt. Waves 2 to
3 ft, except 4 to 6 ft at the bay entrance. Rain. A slight chance
of tstms this evening. Vsby 1 NM or less, increasing to 1 to 3 NM
after midnight.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt, becoming W in
the afternoon. Waves 2 to 3 ft.
.FRI NIGHT...W winds 5 to 10 kt. Waves 2 to 3 ft.
.SAT...W winds around 10 kt. Waves 2 to 3 ft.
.SAT NIGHT THROUGH SUN NIGHT...NW winds 5 to 10 kt. Waves 2 to
3 ft.
.MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Waves around 2 ft.

Winds and waves higher in and near tstms.

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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