Coastal Waters Forecast
Issued by NWS Boston, MA

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FZUS51 KBOX 232304
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
704 PM EDT Tue Apr 23 2024

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

ANZ200-241200-
704 PM EDT Tue Apr 23 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
Cold front sweeps across the waters on Wednesday bringing scattered
showers and perhaps a thunderstorm or two. Winds will shift from the
southwest to the west, eventually turning north, by Wednesday night.
Winds will gust to as high as 25 to 30kt on northerly flow into
Thursday morning. High pressure again builds over the waters for
late week.

$$

ANZ250-241200-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
704 PM EDT Tue Apr 23 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY MORNING...

.TONIGHT...S winds 10 to 15 kt with gusts up to 25 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 4 seconds and SE 3 ft at 9 seconds.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft. Wave Detail: SE 5 ft at 10 seconds and S 2 ft at 3 seconds.
A chance of showers.
.WED NIGHT...NW winds 20 to 25 kt, becoming N 15 to 20 kt after
midnight. Gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: N 5 ft
at 6 seconds and E 5 ft at 9 seconds.
.THU...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W
5 to 10 kt in the afternoon. Seas 4 to 6 ft, subsiding to 2 to
4 ft in the afternoon. Wave Detail: N 4 ft at 6 seconds and E
3 ft at 9 seconds, becoming NW 3 ft at 5 seconds and E 2 ft at
9 seconds.
.THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas
2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and E 2 ft at
9 seconds.
.FRI AND FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and N 1 ft at
4 seconds.
.SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft.
.SAT NIGHT AND SUN...SW winds around 15 kt with gusts up to
25 kt. Seas 2 to 4 ft. A chance of showers.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ251-241200-
Massachusetts Bay and Ipswich Bay-
704 PM EDT Tue Apr 23 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY MORNING...

.TONIGHT...S winds 10 to 15 kt. Gusts up to 25 kt this evening.
Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 ft at
10 seconds.
.WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and SE 2 ft at
4 seconds. Showers likely, mainly in the morning.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and W 3 ft at
3 seconds.
.THU...NW winds 10 to 15 kt with gusts up to 20 kt, becoming SE
5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft
at 5 seconds and E 3 ft at 9 seconds.
.THU NIGHT...S winds around 10 kt, becoming W after midnight.
Seas around 2 ft. Wave Detail: NE 2 ft at 6 seconds and E 2 ft at
9 seconds.
.FRI AND FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and NE 1 ft at
4 seconds.
.SAT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.SAT NIGHT AND SUN...S winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. A chance of showers.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ231-241200-
Cape Cod Bay-
704 PM EDT Tue Apr 23 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY MORNING...

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

$$

ANZ254-241200-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
704 PM EDT Tue Apr 23 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY MORNING...

.TONIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas
3 to 5 ft. Wave Detail: E 4 ft at 9 seconds and E 2 ft at
3 seconds.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft. Wave Detail: E 6 ft at 10 seconds and SW 2 ft at 4 seconds.
A chance of showers.
.WED NIGHT...NW winds 15 to 20 kt, becoming N after midnight.
Gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 5 ft at
9 seconds and N 4 ft at 6 seconds.
.THU...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to
5 to 10 kt in the afternoon. Seas 5 to 7 ft, subsiding to 3 to
5 ft in the afternoon. Wave Detail: N 4 ft at 7 seconds and E
4 ft at 9 seconds, becoming N 3 ft at 7 seconds and W 3 ft at
7 seconds.
.THU NIGHT...SE winds around 5 kt, becoming W after midnight.
Seas 2 to 4 ft. Wave Detail: N 3 ft at 7 seconds and SW 2 ft at
7 seconds.
.FRI AND FRI NIGHT...SW winds 5 to 10 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and N 2 ft at
5 seconds.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to
25 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.

$$

ANZ255-241200-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
704 PM EDT Tue Apr 23 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY MORNING...

.TONIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas
3 to 5 ft. Wave Detail: SE 4 ft at 9 seconds and E 1 ft at
3 seconds.
.WED...SW winds 15 to 20 kt. Seas 3 to 5 ft, building to 5 to
7 ft in the afternoon. Wave Detail: SE 5 ft at 10 seconds and S
3 ft at 3 seconds, becoming E 5 ft at 10 seconds and SW 4 ft at
6 seconds. A chance of showers.
.WED NIGHT...NW winds 15 to 20 kt, becoming N after midnight.
Gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: NW 5 ft at
7 seconds and E 4 ft at 9 seconds.
.THU...N winds 15 to 20 kt, becoming NE 5 to 10 kt in the
afternoon. Seas 4 to 6 ft, subsiding to 2 to 4 ft in the
afternoon. Wave Detail: SW 4 ft at 7 seconds and N 3 ft at
4 seconds, becoming SW 3 ft at 7 seconds and NE 2 ft at
4 seconds.
.THU NIGHT...SE winds 5 to 10 kt, becoming W after midnight. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 7 seconds and E 2 ft at
8 seconds.
.FRI AND FRI NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 3 seconds and NE 1 ft at 4 seconds.
.SAT THROUGH SUN NIGHT...SW winds 15 to 20 kt with gusts up to
25 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.

$$

ANZ256-241200-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
704 PM EDT Tue Apr 23 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY MORNING...

.TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft, building to 3 to
5 ft after midnight. Wave Detail: SE 2 ft at 9 seconds and SE
1 ft at 3 seconds, becoming SE 4 ft at 9 seconds and SW 1 ft at
3 seconds.
.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to
7 ft. Wave Detail: SE 5 ft at 11 seconds and SW 4 ft at
7 seconds. A chance of showers.
.WED NIGHT...NW winds 15 to 20 kt, becoming N after midnight.
Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: NW 5 ft at
7 seconds and E 4 ft at 9 seconds.
.THU...N winds 10 to 15 kt with gusts up to 20 kt, becoming E
5 to 10 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: SW 4 ft
at 7 seconds and N 3 ft at 4 seconds.
.THU NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
around 2 ft. Wave Detail: S 2 ft at 7 seconds and E 2 ft at
8 seconds.
.FRI AND FRI NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: NE 1 ft at 3 seconds and S 1 ft at 7 seconds.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to
25 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.

$$

ANZ232-241200-
Nantucket Sound-
704 PM EDT Tue Apr 23 2024

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

$$

ANZ233-241200-
Vineyard Sound-
704 PM EDT Tue Apr 23 2024

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

$$

ANZ234-241200-
Buzzards Bay-
704 PM EDT Tue Apr 23 2024

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

$$

ANZ235-241200-
Rhode Island Sound-
704 PM EDT Tue Apr 23 2024

.TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 9 seconds and S 1 ft at 3 seconds.
.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: SE 4 ft at 11 seconds and S 3 ft at 4 seconds.
A chance of showers.
.WED NIGHT...NW winds 10 to 15 kt, becoming N after midnight.
Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at
7 seconds and SE 3 ft at 10 seconds.
.THU...N winds 10 to 15 kt with gusts up to 20 kt, becoming SE
5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft
at 7 seconds and N 2 ft at 3 seconds.
.THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas
around 2 ft in the evening, then 1 foot or less. Wave Detail: SE
2 ft at 7 seconds and E 1 ft at 3 seconds, becoming SE 1 ft at
3 seconds and SW 1 ft at 6 seconds.
.FRI AND FRI NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 6 seconds and E 1 ft at 3 seconds.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to
25 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.

$$

ANZ237-241200-
Block Island Sound-
704 PM EDT Tue Apr 23 2024

.TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 9 seconds and SE 1 ft at 3 seconds.
.WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. Wave Detail: SE 4 ft at 11 seconds and SW 3 ft at
6 seconds. A chance of showers.
.WED NIGHT...NW winds 10 to 15 kt, becoming N after midnight.
Gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at
10 seconds and W 3 ft at 6 seconds.
.THU...N winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 7 seconds and SE 3 ft at 9 seconds.
.THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas
around 2 ft in the evening, then 1 foot or less. Wave Detail: S
2 ft at 7 seconds and E 1 ft at 3 seconds, becoming E 1 ft at
3 seconds and SW 1 ft at 6 seconds.
.FRI AND FRI NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: E 1 ft at 3 seconds and SE 1 ft at 7 seconds.
.SAT...SW winds 5 to 10 kt with gusts up to 20 kt. Seas around
2 ft.
.SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of showers.
.SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ230-241200-
Boston Harbor-
704 PM EDT Tue Apr 23 2024

.TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Waves around 2 ft.
.WED...S winds 10 to 15 kt, becoming SW in the afternoon. Waves
around 2 ft. Showers likely, mainly in the morning.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Waves
around 2 ft.
.THU...NW winds 10 to 15 kt, becoming NE 5 to 10 kt in the
afternoon. Waves around 2 ft in the morning, then 1 foot or less.
.THU NIGHT...S winds around 10 kt, becoming W after midnight.
Waves 1 foot or less.
.FRI AND FRI NIGHT...SW winds 10 to 15 kt. Waves around 2 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 foot or less.
.SAT NIGHT AND SUN...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft. A chance of showers.
.SUN NIGHT...SW winds around 10 kt with gusts up to 20 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.

$$

ANZ236-241200-
Narragansett Bay-
704 PM EDT Tue Apr 23 2024

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

$$

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