958
FZUS51 KBOX 160005
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
705 PM EST Mon Dec 15 2025

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

ANZ200-161300-
705 PM EST Mon Dec 15 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Ridge of high pressure builds across the waters later tonight
and then moves well offshore by Wednesday. Low pressure and
associated cold front is expected to result in gale force winds late
Thursday into Friday.

$$

ANZ250-161300-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
705 PM EST Mon Dec 15 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EST TUESDAY...

.TONIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
7 ft, subsiding to 3 to 5 ft after midnight. Wave Detail: NW 6 ft
at 6 seconds and SE 2 ft at 10 seconds, becoming W 4 ft at
5 seconds and N 1 foot at 7 seconds.
.TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and N 1 foot at
5 seconds.
.TUE NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. Gusts up to 30 kt. Seas 2 to 3 ft, building to
3 to 5 ft after midnight. Wave Detail: SW 3 ft at 4 seconds and
SE 1 foot at 11 seconds, becoming SW 5 ft at 5 seconds and SE
1 foot at 11 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: SW 5 ft at 5 seconds and SE 1 foot at
10 seconds.
.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and SE 1 foot at
5 seconds.
.THU...SW winds 10 to 15 kt, becoming S 15 to 20 kt with gusts up
to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: S 3 ft at
4 seconds and N 1 foot at 4 seconds.
.THU NIGHT...S winds 20 to 25 kt, increasing to 25 to 30 kt after
midnight. Gusts up to 45 kt. Seas 4 to 6 ft, building to 5 to
8 ft after midnight. Rain likely after midnight.
.FRI...SW winds 25 to 30 kt with gusts up to 45 kt. Seas 6 to
9 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...W winds 25 to 30 kt with gusts up to 40 kt. Seas
5 to 8 ft. A chance of rain.
.SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft.
.SAT NIGHT...SW winds 20 to 25 kt. Seas 3 to 5 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.

$$

ANZ251-161300-
Massachusetts Bay and Ipswich Bay-
705 PM EST Mon Dec 15 2025

.TONIGHT...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: NW 3 ft
at 4 seconds and NE 2 ft at 7 seconds.
.TUE...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft
at 3 seconds and N 1 foot at 6 seconds.
.TUE NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds
and N 1 foot at 4 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas around
3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at
11 seconds.
.WED NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W
3 ft at 3 seconds and SE 1 foot at 5 seconds.
.THU...SW winds 5 to 10 kt, becoming S 15 to 20 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and
SE 1 foot at 10 seconds.
.THU NIGHT...S winds 20 to 25 kt, increasing to 25 to 30 kt after
midnight. Gusts up to 40 kt. Seas 4 to 6 ft. A chance of rain in
the evening, then rain likely after midnight.
.FRI...SW winds 25 to 30 kt with gusts up to 40 kt. Seas 4 to
6 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...W winds 25 to 30 kt with gusts up to 35 kt. Seas
3 to 5 ft.
.SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft.
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 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.

$$

ANZ231-161300-
Cape Cod Bay-
705 PM EST Mon Dec 15 2025

.TONIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 4 to 6 ft, subsiding to 2 to
4 ft after midnight. Wave Detail: N 4 ft at 7 seconds and SE
1 foot at 10 seconds, becoming N 3 ft at 7 seconds and SE 1 foot
at 10 seconds.
.TUE...W winds around 10 kt. Seas around 2 ft. Wave Detail: N
2 ft at 6 seconds and SE 1 foot at 10 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail:
SW 2 ft at 3 seconds and N 1 foot at 5 seconds.
.WED...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at
10 seconds.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and S 2 ft at
9 seconds.
.THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at
3 seconds and N 1 foot at 4 seconds.
.THU NIGHT...S winds 20 to 25 kt with gusts up to 35 kt,
increasing to 25 to 30 kt with gusts up to 45 kt after midnight.
Seas 3 to 5 ft. Rain likely after midnight.
.FRI...SW winds 25 to 30 kt with gusts up to 45 kt. Seas 4 to
6 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...W winds 25 to 30 kt with gusts up to 35 kt. Seas
3 to 5 ft. A chance of rain.
.SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft.
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
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.

$$

ANZ254-161300-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
705 PM EST Mon Dec 15 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EST TUESDAY...

.TONIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
8 ft, subsiding to 4 to 6 ft after midnight. Wave Detail: N 6 ft
at 7 seconds and SE 2 ft at 10 seconds, becoming NW 5 ft at
7 seconds and SE 1 foot at 10 seconds.
.TUE...W winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft
at 6 seconds and N 2 ft at 7 seconds.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 3 ft, building to 3 to 5 ft after midnight. Wave Detail: SW
3 ft at 4 seconds and SE 1 foot at 11 seconds, becoming SW 5 ft
at 5 seconds and SE 1 foot at 10 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: SW 6 ft at 6 seconds and SE 2 ft at
10 seconds.
.WED NIGHT...W winds 15 to 20 kt, becoming NW 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: W 5 ft
at 5 seconds and S 4 ft at 9 seconds.
.THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: S 3 ft at
4 seconds and S 3 ft at 9 seconds.
.THU NIGHT...S winds 20 to 25 kt with gusts up to 35 kt,
increasing to 25 to 30 kt with gusts up to 45 kt after midnight.
Seas 4 to 6 ft, building to 6 to 9 ft after midnight. A chance of
rain after midnight.
.FRI...S winds 25 to 30 kt with gusts up to 45 kt. Seas 7 to
10 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...W winds 25 to 30 kt with gusts up to 35 kt. Seas
6 to 9 ft. A chance of rain.
.SAT...W winds 20 to 25 kt. Seas 5 to 7 ft.
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 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.

$$

ANZ255-161300-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
705 PM EST Mon Dec 15 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EST TUESDAY...

.TONIGHT...NW winds 20 to 25 kt, becoming W 15 to 20 kt after
midnight. Seas 5 to 8 ft, subsiding to 3 to 5 ft after midnight.
Wave Detail: W 6 ft at 6 seconds and NE 2 ft at 8 seconds,
becoming W 5 ft at 6 seconds and NE 1 foot at 8 seconds.
.TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. Wave Detail: W 4 ft at 6 seconds and NE 1 foot at
8 seconds.
.TUE NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 4 ft, building to 4 to 6 ft after
midnight. Wave Detail: SW 4 ft at 6 seconds and SE 1 foot at
11 seconds, becoming SW 6 ft at 6 seconds and SE 1 foot at
10 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to
9 ft. Wave Detail: SW 9 ft at 8 seconds and S 4 ft at 10 seconds.
.WED NIGHT...W winds 20 to 25 kt with gusts up to 30 kt, becoming
NW 15 to 20 kt after midnight. Seas 6 to 9 ft, subsiding to 5 to
7 ft after midnight. Wave Detail: SW 9 ft at 9 seconds, becoming
SW 7 ft at 9 seconds and W 5 ft at 6 seconds.
.THU...SW winds 5 to 10 kt, becoming S 15 to 20 kt in the
afternoon. Seas 4 to 6 ft. Wave Detail: SW 5 ft at 8 seconds and
S 5 ft at 10 seconds.
.THU NIGHT...S winds 25 to 30 kt, increasing to 30 to 40 kt after
midnight. Seas 5 to 7 ft, building to 9 to 12 ft after midnight.
A chance of rain after midnight.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 10 to
14 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...W winds 35 to 45 kt. Seas 8 to 11 ft. A chance of
rain.
.SAT...W winds 20 to 25 kt. Seas 5 to 7 ft.
.SAT NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas
4 to 6 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.

$$

ANZ256-161300-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
705 PM EST Mon Dec 15 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EST TUESDAY...

.TONIGHT...W winds 20 to 25 kt, diminishing to around 15 kt after
midnight. Seas 4 to 6 ft, subsiding to 3 to 4 ft after midnight.
Wave Detail: NW 5 ft at 5 seconds and NE 1 foot at 8 seconds,
becoming W 4 ft at 5 seconds and NE 1 foot at 7 seconds.
.TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. Wave Detail: W 4 ft at 6 seconds and SE 1 foot at
11 seconds.
.TUE NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 4 ft, building to 4 to 6 ft after
midnight. Wave Detail: SW 4 ft at 6 seconds and SE 1 foot at
11 seconds, becoming SW 6 ft at 6 seconds and SE 1 foot at
10 seconds.
.WED...SW winds 25 to 30 kt. Seas 5 to 8 ft, building to 7 to
9 ft in the afternoon. Wave Detail: SW 8 ft at 7 seconds and SE
1 foot at 10 seconds, becoming SW 9 ft at 8 seconds and S 4 ft at
10 seconds.
.WED NIGHT...W winds 20 to 25 kt with gusts up to 30 kt, becoming
NW 15 to 20 kt after midnight. Seas 6 to 9 ft, subsiding to 5 to
7 ft after midnight. Wave Detail: SW 8 ft at 9 seconds, becoming
SW 7 ft at 8 seconds and SW 4 ft at 7 seconds.
.THU...S winds 10 to 15 kt, increasing to 15 to 20 kt with gusts
up to 25 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: S 5 ft
at 10 seconds and SW 4 ft at 8 seconds.
.THU NIGHT...S winds 25 to 30 kt, increasing to 30 to 40 kt after
midnight. Seas 5 to 8 ft, building to 9 to 13 ft after midnight.
A chance of rain in the evening, then rain likely after midnight.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 11 to
15 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...W winds 30 to 40 kt with gusts up to 45 kt. Seas
8 to 11 ft.
.SAT AND SAT NIGHT...W winds 20 to 25 kt, becoming SW 25 to
30 kt. Seas 5 to 7 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.

$$

ANZ232-161300-
Nantucket Sound-
705 PM EST Mon Dec 15 2025

.TONIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 3 to 5 ft, subsiding to 2 to
3 ft after midnight. Wave Detail: W 3 ft at 4 seconds and NE 2 ft
at 8 seconds.
.TUE...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft
at 4 seconds and NE 1 foot at 8 seconds.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and N 1 foot at
6 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: SW 4 ft at 5 seconds and S 2 ft at 10 seconds.
.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 10 to 15 kt after midnight. Seas 3 to 5 ft. Wave
Detail: W 4 ft at 5 seconds and S 2 ft at 9 seconds.
.THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at
4 seconds and S 2 ft at 9 seconds.
.THU NIGHT...S winds 25 to 35 kt. Gusts up to 45 kt after
midnight. Seas 5 to 7 ft. Rain likely after midnight.
.FRI...SW winds 25 to 35 kt with gusts up to 45 kt. Seas 5 to
7 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...W winds 25 to 35 kt with gusts up to 40 kt. Seas
4 to 6 ft. A chance of rain.
.SAT AND SAT NIGHT...W winds 20 to 25 kt, becoming SW. 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.

$$

ANZ233-161300-
Vineyard Sound-
705 PM EST Mon Dec 15 2025

.TONIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and NE
1 foot at 8 seconds.
.TUE...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft
at 6 seconds and N 1 foot at 8 seconds.
.TUE NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds
and SE 1 foot at 11 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: SW 6 ft at 6 seconds and S 2 ft at 10 seconds.
.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 10 to 15 kt after midnight. Seas 4 to 6 ft,
subsiding to 2 to 4 ft after midnight. Wave Detail: SW 6 ft at
8 seconds, becoming SW 4 ft at 9 seconds and SW 3 ft at
6 seconds.
.THU...SW winds 5 to 10 kt, becoming S 15 to 20 kt in the
afternoon. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 8 seconds.
.THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas
4 to 6 ft, building to 7 to 10 ft after midnight. A chance of
rain in the evening, then rain likely after midnight.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 7 to
10 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...W winds 25 to 35 kt with gusts up to 40 kt. Seas
5 to 7 ft.
.SAT...W winds 15 to 20 kt. Seas 3 to 5 ft.
.SAT NIGHT...SW winds 20 to 25 kt. Seas 3 to 5 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.

$$

ANZ234-161300-
Buzzards Bay-
705 PM EST Mon Dec 15 2025

.TONIGHT...W winds 10 to 15 kt. Gusts up to 20 kt this evening.
Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and NE 2 ft at
7 seconds.
.TUE...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft
at 6 seconds and N 1 foot at 7 seconds.
.TUE NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds
and SE 1 foot at 11 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: SW 5 ft at 6 seconds and S 2 ft at 10 seconds.
.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 10 to 15 kt after midnight. Seas 3 to 5 ft,
subsiding to 2 to 3 ft after midnight. Wave Detail: SW 5 ft at
8 seconds, becoming SW 3 ft at 9 seconds and SW 2 ft at
7 seconds.
.THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at
6 seconds and S 3 ft at 9 seconds.
.THU NIGHT...S winds 25 to 30 kt, increasing to 30 to 40 kt after
midnight. Seas 5 to 7 ft. A chance of rain in the evening, then
rain likely after midnight.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 5 to
7 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...W winds 25 to 30 kt with gusts up to 35 kt. Seas
4 to 6 ft.
.SAT...W winds 15 to 20 kt. Seas 2 to 4 ft.
.SAT NIGHT...SW winds 20 to 25 kt. Seas 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.

$$

ANZ235-161300-
Rhode Island Sound-
705 PM EST Mon Dec 15 2025

.TONIGHT...W winds 15 to 20 kt. Seas 3 to 5 ft, subsiding to 2 to
3 ft after midnight. Wave Detail: W 4 ft at 5 seconds and NE
1 foot at 7 seconds, becoming W 3 ft at 4 seconds and NE 1 foot
at 7 seconds.
.TUE...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft
at 6 seconds and SE 1 foot at 11 seconds.
.TUE NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 3 ft, building to 3 to 5 ft after
midnight. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at
11 seconds, becoming SW 5 ft at 6 seconds and SE 1 foot at
11 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to
7 ft. Wave Detail: SW 7 ft at 8 seconds and S 4 ft at 10 seconds.
.WED NIGHT...W winds 20 to 25 kt, becoming NW 10 to 15 kt after
midnight. Seas 5 to 7 ft. Wave Detail: SW 7 ft at 7 seconds and
SW 6 ft at 8 seconds.
.THU...SW winds 5 to 10 kt, becoming S 15 to 20 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds.
.THU NIGHT...S winds 25 to 30 kt, increasing to 30 to 40 kt after
midnight. Seas 5 to 7 ft, building to 8 to 11 ft after midnight.
A chance of rain in the evening, then rain likely after midnight.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 9 to
12 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...W winds 25 to 35 kt with gusts up to 40 kt. Seas
5 to 8 ft.
.SAT...W winds 15 to 20 kt. Seas 3 to 5 ft.
.SAT NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas
4 to 6 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.

$$

ANZ237-161300-
Block Island Sound-
705 PM EST Mon Dec 15 2025

.TONIGHT...W winds 10 to 15 kt. Gusts up to 20 kt this evening.
Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and NE 1 foot at
6 seconds.
.TUE...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft
at 5 seconds and SE 1 foot at 11 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail:
SW 4 ft at 5 seconds and SE 1 foot at 11 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: SW 5 ft at 6 seconds and S 4 ft at 10 seconds.
.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming
NW 5 to 10 kt after midnight. Seas 4 to 6 ft. Wave Detail: S 5 ft
at 8 seconds and W 3 ft at 5 seconds.
.THU...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: S 4 ft
at 8 seconds and S 3 ft at 5 seconds.
.THU NIGHT...S winds 25 to 30 kt, increasing to 30 to 35 kt after
midnight. Gusts up to 45 kt. Seas 4 to 6 ft, building to 7 to
10 ft after midnight. A chance of rain in the evening, then rain
after midnight.
.FRI...SW winds 25 to 35 kt with gusts up to 45 kt. Seas 8 to
11 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...W winds 25 to 30 kt with gusts up to 35 kt. Seas
5 to 8 ft.
.SAT...W winds 15 to 20 kt. Seas 3 to 5 ft.
.SAT NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas
3 to 5 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.

$$

ANZ230-161300-
Boston Harbor-
705 PM EST Mon Dec 15 2025

.TONIGHT...W winds 10 to 15 kt. Gusts up to 20 kt this evening.
Waves around 2 ft.
.TUE...W winds 5 to 10 kt. Waves 1 foot or less.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Gusts up to 25 kt. Waves around 2 ft.
.WED...SW winds 15 to 20 kt with gusts up to 25 kt. Waves around
2 ft.
.WED NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Waves around 2 ft.
.THU...SW winds 5 to 10 kt, becoming S 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.
.THU NIGHT...S winds 20 to 25 kt, increasing to 25 to 30 kt after
midnight. Gusts up to 40 kt. Waves around 2 ft. A chance of rain
in the evening, then rain likely after midnight.
.FRI...SW winds 25 to 30 kt with gusts up to 45 kt. Waves around
2 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT AND SAT...W winds 25 to 30 kt with gusts up to 35 kt,
diminishing to 15 to 20 kt. Waves around 2 ft.
.SAT NIGHT...SW winds 15 to 20 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.

$$

ANZ236-161300-
Narragansett Bay-
705 PM EST Mon Dec 15 2025

.TONIGHT...W winds 10 to 15 kt. Gusts up to 20 kt this evening.
Waves 2 to 3 ft.
.TUE...W winds 5 to 10 kt. Waves around 2 ft.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Gusts up to 25 kt. Waves 2 to 3 ft.
.WED...SW winds 15 to 20 kt with gusts up to 30 kt. Waves 2 to
4 ft.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Waves 2 to 4 ft.
.THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Waves 2 to 3 ft.
.THU NIGHT...S winds 25 to 35 kt with gusts up to 45 kt. Waves
3 to 5 ft, building to 5 to 7 ft after midnight. At the bay
entrance, waves 4 to 6 ft, building to 7 to 10 ft after midnight.
A chance of rain in the evening, then rain likely after midnight.
.FRI...SW winds 25 to 35 kt with gusts up to 45 kt. Waves 5 to
7 ft, except 7 to 10 ft at the bay entrance. Rain. Vsby 1 to
3 NM.
.FRI NIGHT...W winds 25 to 30 kt. Waves 3 to 5 ft.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft.
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
3 to 5 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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