522
FZUS51 KBOX 221704
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 PM EDT Tue Apr 22 2025

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

ANZ200-230600-
104 PM EDT Tue Apr 22 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Warm front moves through this morning. Cold front moves through
tonight with another high pres arriving for Wed. High pres maintains
control through Thu. Periodic chances for rainfall Fri through next
weekend.

$$

ANZ250-230600-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and SE 1 foot at
10 seconds. Patchy fog. Vsby 1 NM or less.
.TONIGHT...SW winds around 10 kt, becoming W after midnight. Seas
2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and W 2 ft at
3 seconds.
.WED...NW winds 10 to 15 kt, becoming SW 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and
SE 2 ft at 8 seconds.
.WED NIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and NW 1 foot at
3 seconds.
.THU...N winds around 5 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 9 seconds and N 1 foot at
3 seconds.
.THU NIGHT...S winds around 10 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 3 seconds and SE 2 ft at 10 seconds.
.FRI...S winds around 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of showers.
.SAT AND SAT NIGHT...S winds 15 to 20 kt, becoming N. Gusts up to
25 kt. Seas 3 to 5 ft. Showers. Vsby 1 to 3 NM.

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.

$$

ANZ251-230600-
Massachusetts Bay and Ipswich Bay-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...S winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: SW 2 ft at 3 seconds and E 1 foot at 5 seconds. Patchy
fog. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas
around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at
5 seconds.
.WED...NW winds 5 to 10 kt, becoming S in the afternoon. Seas
around 2 ft in the morning, then 1 foot or less. Wave Detail: NW
1 foot at 3 seconds and S 1 foot at 5 seconds.
.WED NIGHT...S winds 5 to 10 kt, becoming N after midnight. Seas
1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot
at 3 seconds.
.THU...NE winds around 5 kt, becoming SE in the afternoon. Seas
1 foot or less, then around 2 ft in the afternoon. Wave Detail: N
1 foot at 3 seconds and S 1 foot at 5 seconds, becoming NE 1 foot
at 3 seconds and SE 1 foot at 5 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 3 seconds and NE 1 foot at 3 seconds.
.FRI...S winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...S winds 10 to 15 kt. Seas around 2 ft. A chance of
showers.
.SAT AND SAT NIGHT...S winds around 15 kt, becoming N. Gusts up
to 25 kt. Seas 2 to 4 ft. Showers. Vsby 1 to 3 NM.

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.

$$

ANZ231-230600-
Cape Cod Bay-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...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 1 foot
at 5 seconds. Patchy fog. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft. Wave Detail: NW 2 ft at 3 seconds and S 2 ft at
4 seconds.
.WED...NW winds 5 to 10 kt, becoming E in the afternoon. Seas
around 2 ft in the morning, then 1 foot or less. Wave Detail: S
2 ft at 6 seconds and NW 1 foot at 4 seconds, becoming N 1 foot
at 4 seconds and S 1 foot at 6 seconds.
.WED NIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas
1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot
at 3 seconds.
.THU...NE winds around 5 kt, becoming SE in the afternoon. Seas
1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot
at 6 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 2 seconds and N 1 foot at 3 seconds.
.FRI...S winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. A chance of showers.
.SAT AND SAT NIGHT...S winds 10 to 15 kt, becoming NW. Gusts up
to 25 kt. Seas 2 to 4 ft. Showers likely.

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.

$$

ANZ254-230600-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot
at 9 seconds. Patchy fog. Vsby 1 NM or less.
.TONIGHT...SW winds around 10 kt, becoming W after midnight. Seas
3 to 4 ft. Wave Detail: S 4 ft at 6 seconds and NW 2 ft at
3 seconds.
.WED...NW winds 5 to 10 kt, becoming W in the afternoon. Seas
2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and NW 2 ft at
4 seconds.
.WED NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot
at 4 seconds.
.THU...NE winds 5 to 10 kt, becoming E in the afternoon. Seas
around 2 ft. Wave Detail: S 2 ft at 6 seconds and SE 2 ft at
9 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 10 seconds and N 1 foot at 3 seconds.
.FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of showers.
.SAT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft. Showers likely.
.SAT NIGHT...NW winds around 15 kt with gusts up to 20 kt. Seas
4 to 6 ft. Showers likely.

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.

$$

ANZ255-230600-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and SE 1 foot at
9 seconds. Patchy fog. Vsby 1 NM or less.
.TONIGHT...SW winds around 10 kt, becoming NW after midnight.
Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and W 1 foot at
3 seconds.
.WED...NW winds 5 to 10 kt, becoming W in the afternoon. Seas
2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and NW 1 foot at
3 seconds.
.WED NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds.
.THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: S 2 ft at 7 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 10 seconds and SW 1 foot at 4 seconds.
.FRI...SW winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of showers.
.SAT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft. Showers likely.
.SAT NIGHT...NW winds 15 to 20 kt. Seas 4 to 6 ft. Showers
likely.

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.

$$

ANZ256-230600-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...SW winds around 15 kt with gusts up to 20 kt.
Seas around 4 ft. Wave Detail: S 4 ft at 6 seconds and SE 1 foot
at 9 seconds. Patchy fog. Vsby 1 NM or less.
.TONIGHT...SW winds around 10 kt, becoming NW after midnight.
Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds and SE 1 foot at
9 seconds.
.WED...NW winds 5 to 10 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and
NW 1 foot at 3 seconds.
.WED NIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds.
.THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: S 2 ft at 6 seconds and N 1 foot at
2 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 5 seconds and SE 2 ft at 10 seconds.
.FRI...SW winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft. A chance of showers.
.SAT AND SAT NIGHT...S winds 15 to 20 kt, becoming N. Gusts up to
25 kt. Seas 3 to 5 ft. Showers likely.

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.

$$

ANZ232-230600-
Nantucket Sound-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...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 NE 1 foot
at 5 seconds. Patchy fog. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft. Wave Detail: SW 2 ft at 6 seconds and W 1 foot at
3 seconds.
.WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
around 2 ft in the morning, then 1 foot or less. Wave Detail: NW
1 foot at 3 seconds and S 1 foot at 7 seconds, becoming W 1 foot
at 2 seconds and S 1 foot at 6 seconds.
.WED NIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas
1 foot or less. Wave Detail: W 1 foot at 2 seconds and S 1 foot
at 7 seconds.
.THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas
1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot
at 5 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: NE 1 foot at 2 seconds and S 1 foot at 4 seconds.
.FRI...SW winds 5 to 10 kt. Seas 1 foot or less.
.FRI NIGHT...S winds 10 to 15 kt. Seas around 2 ft. A chance of
showers.
.SAT AND SAT NIGHT...S winds 15 to 20 kt, becoming NW. Gusts up
to 25 kt. Seas 2 to 4 ft. Showers likely.

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.

$$

ANZ233-230600-
Vineyard Sound-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...SW winds around 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot
at 9 seconds. Patchy fog. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and W 1 foot at
3 seconds.
.WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
around 2 ft in the morning, then 1 foot or less. Wave Detail: SW
2 ft at 6 seconds and NW 1 foot at 3 seconds, becoming W 1 foot
at 3 seconds and S 1 foot at 7 seconds.
.WED NIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas
around 2 ft in the evening, then 1 foot or less. Wave Detail: SW
2 ft at 5 seconds and SE 1 foot at 8 seconds, becoming W 1 foot
at 2 seconds and S 1 foot at 7 seconds.
.THU...NE winds around 5 kt, becoming SE in the afternoon. Seas
1 foot or less. Wave Detail: N 1 foot at 2 seconds and S 1 foot
at 7 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 4 seconds and SE 1 foot at 10 seconds.
.FRI...SW winds 5 to 10 kt. Seas 1 foot or less.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. A chance of showers.
.SAT AND SAT NIGHT...S winds 15 to 20 kt, becoming NW. Gusts up
to 25 kt. Seas 2 to 4 ft. Showers likely.

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.

$$

ANZ234-230600-
Buzzards Bay-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...SW winds around 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot
at 10 seconds. Patchy fog. Vsby 1 to 3 NM.
.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft. Wave Detail: SW 2 ft at 6 seconds and W 1 foot at
3 seconds.
.WED...NW winds around 5 kt, becoming SW in the afternoon. Seas
1 foot or less. Wave Detail: NW 1 foot at 3 seconds and SW 1 foot
at 6 seconds.
.WED NIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas
1 foot or less. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot
at 8 seconds.
.THU...NE winds around 5 kt, becoming S in the afternoon. Seas
1 foot or less. Wave Detail: N 1 foot at 2 seconds and S 1 foot
at 5 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 3 seconds and SE 1 foot at 10 seconds.
.FRI...SW winds 5 to 10 kt. Seas 1 foot or less.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. A chance of showers.
.SAT AND SAT NIGHT...S winds 15 to 20 kt, becoming NW. Gusts up
to 25 kt. Seas 2 to 4 ft. Showers likely.

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.

$$

ANZ235-230600-
Rhode Island Sound-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...SW winds around 15 kt with gusts up to 20 kt.
Seas around 3 ft. Wave Detail: S 3 ft at 6 seconds and SE 1 foot
at 9 seconds. Patchy fog. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas
2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at
3 seconds.
.WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: S 2 ft at 7 seconds and NW 1 foot at
3 seconds.
.WED NIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after
midnight. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds.
.THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft in the morning, then 1 foot or less. Wave Detail: SE
2 ft at 7 seconds and N 1 foot at 2 seconds, becoming NE 1 foot
at 2 seconds and SE 1 foot at 7 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 5 seconds and SE 1 foot at 9 seconds.
.FRI...SW winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of showers.
.SAT AND SAT NIGHT...S winds 15 to 20 kt, becoming NW. Gusts up
to 25 kt. Seas 3 to 5 ft. Showers.

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.

$$

ANZ237-230600-
Block Island Sound-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and W 1 foot at
3 seconds. Patchy fog. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas
2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at
3 seconds.
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: S 2 ft at 7 seconds and NW 1 foot at
3 seconds.
.WED NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot
at 3 seconds.
.THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft in the morning, then 1 foot or less. Wave Detail: SE
2 ft at 7 seconds, becoming S 1 foot at 5 seconds and SE 1 foot
at 8 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
1 foot at 5 seconds and SE 1 foot at 9 seconds.
.FRI...SW winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers.
.SAT AND SAT NIGHT...S winds 10 to 15 kt, becoming NW. Gusts up
to 20 kt. Seas 2 to 4 ft. Showers likely.

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.

$$

ANZ230-230600-
Boston Harbor-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.TONIGHT...W winds 5 to 10 kt. Waves around 2 ft.
.WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Waves
1 foot or less.
.WED NIGHT...E winds around 5 kt, becoming N after midnight.
Waves 1 foot or less.
.THU...NE winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 foot or less.
.FRI...S winds 5 to 10 kt. Waves around 2 ft.
.FRI NIGHT...S winds 10 to 15 kt. Waves around 2 ft. A chance of
showers.
.SAT AND SAT NIGHT...S winds 10 to 15 kt, becoming N. Gusts up to
20 kt. Waves around 2 ft. Showers.

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.

$$

ANZ236-230600-
Narragansett Bay-
104 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 3 ft.
.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves
2 to 3 ft.
.WED...NW winds around 5 kt, becoming S in the afternoon. Waves
around 2 ft.
.WED NIGHT...SW winds 5 to 10 kt, becoming N after midnight.
Waves around 2 ft.
.THU...NE winds around 5 kt, becoming S in the afternoon. Waves
1 foot or less.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 foot or less.
.FRI...SW winds 5 to 10 kt. Waves around 2 ft.
.FRI NIGHT...S winds 10 to 15 kt. Waves 2 to 3 ft. A chance of
showers.
.SAT AND SAT NIGHT...S winds 10 to 15 kt, becoming NW. Gusts up
to 20 kt. Waves 2 to 4 ft. Showers.

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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