638
FZUS51 KBOX 161504
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 AM EST Sun Nov 16 2025

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

ANZ200-170400-
1004 AM EST Sun Nov 16 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
A cold front will move across the waters this morning followed by
gale force westerly winds into Mon as a gale center strengthens in
the Maritimes. Gusty winds will linger into Tue, then high pres
moves into the waters Wed then offshore Thu as a weak frontal
boundary sets up to the S. A frontal system will approach from the
west Fri.

$$

ANZ250-170400-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH LATE MONDAY NIGHT...

.THIS AFTERNOON...W winds 20 to 25 kt with gusts up to 30 kt,
increasing to 25 to 30 kt with gusts up to 40 kt. Seas 3 to 4 ft,
building to 4 to 6 ft. Wave Detail: W 4 ft at 4 seconds and SE
2 ft at 6 seconds, becoming W 6 ft at 5 seconds and SE 1 foot at
7 seconds. A slight chance of showers.
.TONIGHT...W winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to
7 ft. Wave Detail: W 7 ft at 6 seconds and SE 1 foot at
8 seconds.
.MON...W winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to
7 ft. Wave Detail: W 7 ft at 6 seconds and E 1 foot at
14 seconds.
.MON NIGHT...W winds 20 to 25 kt with gusts up to 35 kt. Seas
5 to 7 ft. Wave Detail: W 7 ft at 6 seconds and E 1 foot at
13 seconds.
.TUE...W winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: W 5 ft
at 5 seconds and E 1 foot at 13 seconds.
.TUE NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: W
4 ft at 5 seconds and E 1 foot at 12 seconds.
.WED THROUGH THU...S winds 5 to 10 kt. Seas around 2 ft.
.THU NIGHT...S winds 5 to 10 kt. Seas 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.

$$

ANZ251-170400-
Massachusetts Bay and Ipswich Bay-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH MONDAY EVENING...

.THIS AFTERNOON...W winds 20 to 25 kt with gusts up to 35 kt.
Seas around 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 1 foot
at 5 seconds.
.TONIGHT...W winds 25 to 30 kt with gusts up to 35 kt. Seas 3 to
4 ft. Wave Detail: W 4 ft at 4 seconds and SE 1 foot at
6 seconds.
.MON...W winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: NW 4 ft at 6 seconds and
E 1 foot at 13 seconds.
.MON NIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas
3 to 4 ft. Wave Detail: NW 4 ft at 5 seconds.
.TUE AND TUE NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: NW 3 ft at 5 seconds and E 1 foot at
13 seconds.
.WED THROUGH THU...N winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: NW 1 foot at 4 seconds and E 1 foot at 11 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. 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.

$$

ANZ231-170400-
Cape Cod Bay-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH MONDAY EVENING...

.THIS AFTERNOON...W winds around 20 kt, increasing to 25 to
30 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 5 seconds and SE
1 foot at 6 seconds.
.TONIGHT...W winds 25 to 30 kt with gusts up to 35 kt. Seas 3 to
5 ft. Wave Detail: W 5 ft at 5 seconds and S 1 foot at 8 seconds.
.MON...W winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 3 to 5 ft. Wave Detail: W 5 ft at 5 seconds and E
1 foot at 13 seconds.
.MON NIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas
3 to 4 ft. Wave Detail: N 4 ft at 6 seconds and E 1 foot at
14 seconds.
.TUE AND TUE NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: W 4 ft at 5 seconds and E 1 foot at
14 seconds.
.WED THROUGH THU...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: N 1 foot at 4 seconds and E 1 foot at 13 seconds.
.THU NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. 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.

$$

ANZ254-170400-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH LATE MONDAY NIGHT...

.THIS AFTERNOON...W winds 20 to 25 kt, increasing to 25 to 30 kt.
Seas 5 to 7 ft. S and E of Nantucket, seas 6 to 9 ft, building to
8 to 11 ft. Wave Detail: W 7 ft at 5 seconds and SE 2 ft at
6 seconds.
.TONIGHT...W winds around 30 kt with gusts up to 40 kt. Seas 7 to
10 ft, except 11 to 15 ft S and E of Nantucket. Wave Detail: W
9 ft at 6 seconds and S 2 ft at 9 seconds.
.MON...W winds 25 to 30 kt with gusts up to 35 kt. Seas 6 to
9 ft, except 10 to 14 ft S and E of Nantucket. Wave Detail: W
8 ft at 7 seconds and SE 1 foot at 13 seconds.
.MON NIGHT...W winds 25 to 30 kt, diminishing to 20 to 25 kt
after midnight. Seas 5 to 8 ft. S and E of Nantucket, seas 9 to
11 ft, subsiding to 7 to 10 ft after midnight. Wave Detail: NW
7 ft at 7 seconds and SE 1 foot at 13 seconds.
.TUE...W winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 5 to 7 ft. Wave Detail: NW 6 ft at 6 seconds and
E 1 foot at 9 seconds.
.TUE NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 3 to 5 ft. Wave Detail: NW 4 ft at 6 seconds
and SE 1 foot at 8 seconds.
.WED THROUGH THU...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...E winds 5 to 10 kt. Seas 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.

$$

ANZ255-170400-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH LATE MONDAY NIGHT...

.THIS AFTERNOON...W winds 25 to 35 kt. Seas 6 to 9 ft, building
to 8 to 11 ft. Wave Detail: SW 9 ft at 8 seconds and E 1 foot at
7 seconds, becoming W 11 ft at 8 seconds and S 1 foot at
8 seconds. A slight chance of showers.
.TONIGHT...W winds 30 to 40 kt. Seas 10 to 14 ft. Wave Detail: W
14 ft at 9 seconds and S 1 foot at 9 seconds.
.MON...W winds 30 to 40 kt. Seas 9 to 13 ft. Wave Detail: W 13 ft
at 9 seconds and E 1 foot at 14 seconds.
.MON NIGHT...NW winds 25 to 35 kt. Seas 8 to 11 ft. Wave Detail:
W 10 ft at 8 seconds and E 1 foot at 14 seconds.
.TUE...W winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to
8 ft. Wave Detail: W 8 ft at 7 seconds and E 1 foot at
14 seconds.
.TUE NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 4 to 6 ft. Wave Detail: W 5 ft at 6 seconds
and E 1 foot at 13 seconds.
.WED THROUGH THU...E winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...E winds 5 to 10 kt. Seas 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.

$$

ANZ256-170400-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH LATE MONDAY NIGHT...

.THIS AFTERNOON...W winds 25 to 30 kt, increasing to 30 to 35 kt
with gusts up to 40 kt. Seas 7 to 9 ft, building to 8 to 11 ft.
Wave Detail: SW 9 ft at 7 seconds and E 1 foot at 14 seconds,
becoming W 10 ft at 8 seconds and S 1 foot at 8 seconds.
.TONIGHT...W winds 30 to 40 kt. Seas 9 to 12 ft. Wave Detail: W
12 ft at 8 seconds and S 1 foot at 8 seconds.
.MON...W winds 30 to 35 kt, diminishing to 25 to 30 kt in the
afternoon. Seas 9 to 12 ft. Wave Detail: W 11 ft at 8 seconds and
SE 1 foot at 14 seconds.
.MON NIGHT...NW winds 25 to 30 kt. Gusts up to 40 kt in the
evening. Seas 7 to 10 ft. Wave Detail: NW 9 ft at 7 seconds and
SE 1 foot at 14 seconds.
.TUE...W winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: NW
6 ft at 6 seconds.
.TUE NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 3 to 5 ft. Wave Detail: NW 4 ft at
5 seconds.
.WED THROUGH THU...E winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...E winds 5 to 10 kt. Seas 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.

$$

ANZ232-170400-
Nantucket Sound-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH MONDAY EVENING...

.THIS AFTERNOON...W winds 20 to 25 kt, increasing to 25 to 30 kt.
Seas 4 to 6 ft. Wave Detail: W 6 ft at 5 seconds and S 1 foot at
7 seconds.
.TONIGHT...W winds 30 to 35 kt with gusts up to 40 kt. Seas 5 to
7 ft. Wave Detail: W 7 ft at 6 seconds and S 1 foot at 9 seconds.
.MON...W winds 25 to 35 kt. Seas 5 to 7 ft. Wave Detail: W 6 ft
at 6 seconds and SE 1 foot at 13 seconds.
.MON NIGHT...W winds 25 to 30 kt, diminishing to 20 to 25 kt
after midnight. Seas 4 to 6 ft. Wave Detail: NW 5 ft at 6 seconds
and SE 1 foot at 14 seconds.
.TUE...W 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 N
1 foot at 7 seconds.
.TUE NIGHT...W winds 15 to 20 kt, becoming NW 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E
1 foot at 14 seconds.
.WED THROUGH THU...E winds 5 to 10 kt. Seas around 2 ft.
.THU NIGHT...E winds 5 to 10 kt. Seas 1 foot or less. 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.

$$

ANZ233-170400-
Vineyard Sound-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH MONDAY EVENING...

.THIS AFTERNOON...W winds 20 to 25 kt, increasing to 25 to 30 kt.
Seas 4 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and E 1 foot at
14 seconds.
.TONIGHT...W winds 25 to 35 kt, becoming 30 to 35 kt after
midnight. Seas 5 to 8 ft. Wave Detail: SW 8 ft at 8 seconds and E
1 foot at 14 seconds.
.MON...W winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to
7 ft. Wave Detail: W 7 ft at 8 seconds.
.MON NIGHT...W winds 25 to 30 kt, diminishing to 20 to 25 kt
after midnight. Seas 4 to 6 ft. Wave Detail: W 5 ft at 7 seconds.
.TUE AND TUE NIGHT...NW winds 20 to 25 kt. Seas 2 to 4 ft. Wave
Detail: W 4 ft at 6 seconds.
.WED THROUGH THU...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: W 1 foot at 5 seconds.
.THU NIGHT...E winds 5 to 10 kt. Seas 1 foot or less. 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.

$$

ANZ234-170400-
Buzzards Bay-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH MONDAY EVENING...

.THIS AFTERNOON...W winds 20 to 25 kt, increasing to 25 to 30 kt.
Seas 3 to 5 ft. Wave Detail: W 5 ft at 7 seconds and S 1 foot at
7 seconds.
.TONIGHT...W winds 25 to 30 kt with gusts up to 40 kt. Seas 4 to
6 ft. Wave Detail: W 6 ft at 7 seconds and S 1 foot at 8 seconds.
.MON...W winds 25 to 30 kt with gusts up to 35 kt. Seas 3 to
5 ft. Wave Detail: W 5 ft at 7 seconds and SE 1 foot at
13 seconds.
.MON NIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas
3 to 4 ft. Wave Detail: W 4 ft at 7 seconds and SE 1 foot at
13 seconds.
.TUE AND TUE NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and E 1 foot at
14 seconds.
.WED THROUGH THU...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: W 1 foot at 5 seconds.
.THU NIGHT...E winds 5 to 10 kt. Seas 1 foot or less. 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.

$$

ANZ235-170400-
Rhode Island Sound-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH MONDAY EVENING...

.THIS AFTERNOON...W winds 25 to 30 kt with gusts up to 35 kt.
Seas 4 to 6 ft, building to 5 to 8 ft. Wave Detail: SW 6 ft at
7 seconds and E 1 foot at 15 seconds, becoming W 8 ft at
8 seconds and S 2 ft at 8 seconds.
.TONIGHT...W winds 30 to 35 kt with gusts up to 40 kt. Seas 6 to
9 ft. Wave Detail: W 9 ft at 8 seconds and S 2 ft at 9 seconds.
.MON...W winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to
8 ft. Wave Detail: W 8 ft at 8 seconds and S 1 foot at 5 seconds.
.MON NIGHT...W winds 25 to 30 kt, diminishing to 20 to 25 kt
after midnight. Seas 5 to 7 ft. Wave Detail: W 7 ft at 7 seconds
and S 1 foot at 14 seconds.
.TUE...W 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 5 seconds.
.TUE NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and S
1 foot at 8 seconds.
.WED THROUGH THU...E winds 5 to 10 kt. Seas around 2 ft.
.THU NIGHT...E winds 5 to 10 kt. Seas 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.

$$

ANZ237-170400-
Block Island Sound-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH MONDAY EVENING...

.THIS AFTERNOON...W winds 25 to 30 kt with gusts up to 35 kt.
Seas 5 to 7 ft. Wave Detail: W 6 ft at 6 seconds and S 3 ft at
9 seconds.
.TONIGHT...W winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to
8 ft. Wave Detail: W 7 ft at 6 seconds and S 3 ft at 9 seconds.
.MON...W winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to
7 ft. Wave Detail: W 6 ft at 6 seconds and S 2 ft at 9 seconds.
.MON NIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas
4 to 6 ft. Wave Detail: W 5 ft at 6 seconds and S 1 foot at
12 seconds.
.TUE AND TUE NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and S 1 foot at
9 seconds.
.WED THROUGH THU...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: NW 1 foot at 4 seconds.
.THU NIGHT...E winds 5 to 10 kt. Seas 1 foot or less. 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.

$$

ANZ230-170400-
Boston Harbor-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...

.THIS AFTERNOON...W winds 20 to 25 kt with gusts up to 30 kt.
Waves around 2 ft.
.TONIGHT...W winds 25 to 30 kt, diminishing to 20 to 25 kt after
midnight. Waves around 2 ft.
.MON...W winds 20 to 25 kt with gusts up to 30 kt. Waves around
2 ft.
.MON NIGHT...W winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. Waves around 2 ft.
.TUE AND TUE NIGHT...W winds 15 to 20 kt. Waves around 2 ft.
.WED THROUGH THU...NE winds 5 to 10 kt. Waves 1 foot or less.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. 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.

$$

ANZ236-170400-
Narragansett Bay-
1004 AM EST Sun Nov 16 2025

...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...

.THIS AFTERNOON...W winds 20 to 25 kt with gusts up to 35 kt.
Waves around 3 ft.
.TONIGHT...W winds 20 to 25 kt with gusts up to 35 kt. Waves
around 3 ft, except 4 to 6 ft at the bay entrance.
.MON...W winds 20 to 25 kt with gusts up to 30 kt. Waves around
3 ft.
.MON NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Waves
2 to 3 ft.
.TUE AND TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 3 ft.
.WED THROUGH THU...E winds around 5 kt. Waves 1 foot or less.
.THU NIGHT...NE winds 5 to 10 kt. Waves 1 foot or less. 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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