269
FZUS51 KBOX 222105
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EST Wed Jan 22 2025

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

ANZ200-231000-
404 PM EST Wed Jan 22 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Blast of Arctic air results in areas of freezing spray across
portions of the southern waters this morning. A high pressure system
will then build over the waters later today. This will be followed
by a low pressure system that will likely pass well southeast of the
benchmark late Thursday night through early Friday morning. Weak
high pressure returns for the weekend.

$$

ANZ250-231000-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
404 PM EST Wed Jan 22 2025

.TONIGHT...W winds around 5 kt, becoming SW after midnight. Seas
2 to 3 ft. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at
8 seconds. A slight chance of snow after midnight.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at
6 seconds.
.THU NIGHT...W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W
3 ft at 4 seconds and SE 1 foot at 4 seconds.
.FRI...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: NW 3 ft at 4 seconds and SE 1 foot at
4 seconds.
.FRI NIGHT...NW winds around 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at
8 seconds.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: N 3 ft at 4 seconds and SE 2 ft at 8 seconds.
.SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft.
.SUN...SW winds around 20 kt with gusts up to 25 kt. Seas 3 to
5 ft.
.SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft.
.MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft.
.MON NIGHT...SW winds 20 to 25 kt with gusts up 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.

$$

ANZ251-231000-
Massachusetts Bay and Ipswich Bay-
404 PM EST Wed Jan 22 2025

.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N
1 foot at 4 seconds and SE 1 foot at 8 seconds.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot
at 4 seconds.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at
4 seconds.
.FRI...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft
at 3 seconds and E 1 foot at 5 seconds.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and N 1 foot at
4 seconds.
.SAT AND SAT NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 3 seconds and N 1 foot at
4 seconds.
.SUN THROUGH MON NIGHT...SW winds 20 to 25 kt with gusts up to
30 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.

$$

ANZ231-231000-
Cape Cod Bay-
404 PM EST Wed Jan 22 2025

.TONIGHT...NW winds around 5 kt, becoming SW after midnight. Seas
around 2 ft this evening, then 1 foot or less. Wave Detail: N
2 ft at 4 seconds and SE 1 foot at 8 seconds, becoming N 1 foot
at 4 seconds and SE 1 foot at 7 seconds.
.THU...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: N 1 foot at 5 seconds and SE
1 foot at 7 seconds, becoming SW 1 foot at 2 seconds and NE
1 foot at 5 seconds. A chance of snow in the afternoon.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: NW 2 ft at 3 seconds and E 1 foot at
4 seconds.
.FRI...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: NW
2 ft at 4 seconds and SE 1 foot at 5 seconds.
.FRI NIGHT THROUGH SAT NIGHT...SW winds 15 to 20 kt. Seas 2 to
3 ft. Wave Detail: NW 2 ft at 4 seconds and SE 1 foot at
8 seconds.
.SUN THROUGH MON NIGHT...SW winds 15 to 20 kt with gusts up to
25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 3 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.

$$

ANZ254-231000-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
404 PM EST Wed Jan 22 2025

.TONIGHT...NE winds 5 to 10 kt, becoming S after midnight. Seas
2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and S 1 foot at
8 seconds. A slight chance of snow after midnight.
.THU...S winds 10 to 15 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and E 2 ft at
8 seconds. A chance of snow and rain in the afternoon.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at
4 seconds.
.FRI...W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at
9 seconds.
.FRI NIGHT THROUGH SAT NIGHT...W winds 15 to 20 kt with gusts up
to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and
SE 2 ft at 8 seconds.
.SUN THROUGH MON...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 4 to 6 ft. Wave Detail: SW 4 ft at 5 seconds and S 3 ft at
9 seconds.
.MON NIGHT...W winds 20 to 25 kt with gusts up 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.

$$

ANZ255-231000-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
404 PM EST Wed Jan 22 2025

.TONIGHT...NE winds 5 to 10 kt, becoming E after midnight. Seas
2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and NW 1 foot at
4 seconds. A slight chance of snow.
.THU...S winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to
3 ft. Wave Detail: E 2 ft at 5 seconds and W 1 foot at 3 seconds.
A chance of snow.
.THU NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after
midnight. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE
2 ft at 8 seconds.
.FRI...NW winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft
at 5 seconds and SE 2 ft at 8 seconds.
.FRI NIGHT AND SAT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and SE 2 ft at
8 seconds.
.SAT NIGHT...W winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. Seas 3 to 4 ft, building to 4 to 6 ft after midnight.
Wave Detail: W 4 ft at 5 seconds and SE 2 ft at 10 seconds,
becoming SW 6 ft at 6 seconds and SE 2 ft at 10 seconds.
.SUN...W winds 20 to 25 kt. Seas 5 to 7 ft.
.SUN NIGHT AND MON...W winds 20 to 25 kt. Seas 4 to 6 ft.
.MON NIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas
5 to 8 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.

$$

ANZ256-231000-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
404 PM EST Wed Jan 22 2025

.TONIGHT...N winds around 5 kt, becoming W after midnight. Seas
around 2 ft this evening, then 1 foot or less. Wave Detail: N
1 foot at 4 seconds and SE 1 foot at 7 seconds, becoming N 1 foot
at 3 seconds and SE 1 foot at 7 seconds. A slight chance of snow.
.THU...SW winds around 5 kt, becoming W 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and E
1 foot at 3 seconds.
.THU NIGHT...W winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: NW
4 ft at 5 seconds and SE 2 ft at 8 seconds.
.FRI...NW winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. Wave Detail: NW 3 ft at 5 seconds and SE 2 ft at
9 seconds.
.FRI NIGHT...NW winds around 15 kt. Seas around 3 ft. Wave
Detail: NW 3 ft at 4 seconds and SE 2 ft at 8 seconds.
.SAT...NW winds 10 to 15 kt, becoming W 15 to 20 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and
SE 2 ft at 8 seconds.
.SAT NIGHT...W winds 20 to 25 kt. Seas 3 to 4 ft, building to
5 to 6 ft after midnight.
.SUN AND SUN NIGHT...W winds 20 to 25 kt. Seas 5 to 7 ft.
.MON...W winds 20 to 25 kt. Seas 4 to 6 ft.
.MON NIGHT...W winds 25 to 30 kt. Seas 6 to 8 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.

$$

ANZ232-231000-
Nantucket Sound-
404 PM EST Wed Jan 22 2025

.TONIGHT...N winds around 5 kt, becoming SW after midnight. Seas
1 foot or less. Wave Detail: N 1 foot at 3 seconds and SE 1 foot
at 8 seconds. A slight chance of snow after midnight.
.THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW
1 foot at 3 seconds and E 1 foot at 6 seconds. A chance of snow
in the afternoon.
.THU NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
W 2 ft at 3 seconds and E 1 foot at 5 seconds.
.FRI...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft
at 3 seconds and E 1 foot at 4 seconds.
.FRI NIGHT THROUGH SAT NIGHT...W winds 15 to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and N 1 foot at
4 seconds.
.SUN THROUGH MON...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and S 2 ft at
8 seconds.
.MON NIGHT...W winds 20 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.

$$

ANZ233-231000-
Vineyard Sound-
404 PM EST Wed Jan 22 2025

.TONIGHT...NW winds around 5 kt. Seas 1 foot or less. Wave
Detail: NW 1 foot at 3 seconds and NE 1 foot at 3 seconds. A
slight chance of snow after midnight.
.THU...W winds around 5 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 1 foot or less, then around 2 ft in the
afternoon. Wave Detail: W 1 foot at 2 seconds and E 1 foot at
4 seconds, becoming SW 1 foot at 3 seconds and E 1 foot at
5 seconds. A chance of snow in the morning.
.THU NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 4 seconds and E 1 foot at 5 seconds.
.FRI...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft
at 5 seconds and SE 1 foot at 5 seconds.
.FRI NIGHT...NW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
W 2 ft at 4 seconds and S 1 foot at 8 seconds.
.SAT...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and SE 1 foot
at 7 seconds.
.SAT NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 ft.
.SUN THROUGH MON...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 5 ft.
.MON NIGHT...W winds 20 to 25 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.

$$

ANZ234-231000-
Buzzards Bay-
404 PM EST Wed Jan 22 2025

.TONIGHT...N winds around 5 kt. Seas 1 foot or less. Wave Detail:
N 1 foot at 3 seconds and S 1 foot at 7 seconds. A slight chance
of snow after midnight.
.THU...W winds around 5 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 1 foot or less, then around 2 ft in the
afternoon. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at
4 seconds, becoming SW 1 foot at 2 seconds and E 1 foot at
5 seconds. A chance of snow in the morning.
.THU NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 4 seconds and E 1 foot at 5 seconds.
.FRI...W winds 10 to 15 kt. Seas around 2 ft in the morning, then
1 foot or less. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at
5 seconds, becoming W 1 foot at 4 seconds and S 1 foot at
8 seconds.
.FRI NIGHT...NW winds around 10 kt. Seas 1 foot or less. Wave
Detail: NW 1 foot at 4 seconds and S 1 foot at 8 seconds.
.SAT...W winds 10 to 15 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: N 1 foot at 4 seconds and SE
1 foot at 7 seconds, becoming W 2 ft at 4 seconds and NE 1 foot
at 4 seconds.
.SAT NIGHT...W winds 15 to 20 kt. Seas 2 to 4 ft.
.SUN THROUGH MON...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft.
.MON NIGHT...W winds 20 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.

$$

ANZ235-231000-
Rhode Island Sound-
404 PM EST Wed Jan 22 2025

.TONIGHT...N winds around 5 kt, becoming W after midnight. Seas
1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot
at 3 seconds. A slight chance of snow after midnight.
.THU...W winds around 5 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and
E 1 foot at 3 seconds.
.THU 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 SE
2 ft at 9 seconds.
.FRI...NW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W
2 ft at 4 seconds and S 2 ft at 8 seconds.
.FRI NIGHT...NW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
W 2 ft at 4 seconds and SE 2 ft at 8 seconds.
.SAT...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at
8 seconds.
.SAT NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 ft, building to 4 to 5 ft after midnight.
.SUN AND SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 4 to 6 ft.
.MON...W winds 20 to 25 kt. Seas 3 to 5 ft.
.MON NIGHT...W winds 20 to 25 kt with gusts up 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.

$$

ANZ237-231000-
Block Island Sound-
404 PM EST Wed Jan 22 2025

.TONIGHT...W winds around 5 kt. Seas 1 foot or less. Wave Detail:
NW 1 foot at 2 seconds and NE 1 foot at 4 seconds. A slight
chance of snow after midnight.
.THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW
1 foot at 2 seconds and E 1 foot at 3 seconds.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at
9 seconds.
.FRI...NW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W
2 ft at 4 seconds and SE 2 ft at 9 seconds.
.FRI NIGHT...NW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
W 2 ft at 3 seconds and SE 2 ft at 8 seconds.
.SAT...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 2 ft
at 8 seconds.
.SAT NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 ft.
.SUN THROUGH MON...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 5 ft.
.MON NIGHT...W winds 15 to 20 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.

$$

ANZ230-231000-
Boston Harbor-
404 PM EST Wed Jan 22 2025

.TONIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.THU...SW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon.
.THU NIGHT...W winds 10 to 15 kt. Waves 1 foot or less.
.FRI...W winds around 10 kt. Waves around 2 ft in the morning,
then 1 foot or less.
.FRI NIGHT THROUGH SAT NIGHT...SW winds 15 to 20 kt. Waves around
2 ft.
.SUN THROUGH MON NIGHT...SW winds 15 to 20 kt with gusts up to
25 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.

$$

ANZ236-231000-
Narragansett Bay-
404 PM EST Wed Jan 22 2025

.TONIGHT...NW winds around 5 kt. Waves 1 foot or less. A slight
chance of snow after midnight.
.THU...SW winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. Waves 1 foot or less, then around 2 ft in the
afternoon.
.THU NIGHT...W winds 5 to 10 kt. Waves around 2 ft.
.FRI...W winds around 10 kt. Waves around 2 ft.
.FRI NIGHT...NW winds around 10 kt. Waves around 2 ft.
.SAT...W winds 5 to 10 kt. Waves around 2 ft.
.SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves
2 to 4 ft.
.SUN...W winds 10 to 15 kt with gusts up to 25 kt. Waves 3 to
5 ft.
.SUN NIGHT AND MON...W winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 4 ft.
.MON NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
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.

$$

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
www.facebook.com/NWSBoston

You can follow us on Twitter at
@NWSBoston