271
FZUS51 KBOX 242005
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
405 PM EDT Sat May 24 2025

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

ANZ200-250900-
405 PM EDT Sat May 24 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Low pressure over the maritimes will slowly weaken this weekend,
then finally move into the north Atlantic Monday. Then strong high
Canadian pressure builds into the Great Lakes and New England
Tuesday, then sliding south of New England Wednesday. A slow moving
cold front will approach New England late next week.

$$

ANZ250-250900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
405 PM EDT Sat May 24 2025

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

$$

ANZ251-250900-
Massachusetts Bay and Ipswich Bay-
405 PM EDT Sat May 24 2025

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

$$

ANZ231-250900-
Cape Cod Bay-
405 PM EDT Sat May 24 2025

.TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt after midnight.
Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and E 2 ft at
9 seconds. A slight chance of showers this evening.
.SUN...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft. Wave Detail: E 2 ft at 9 seconds and N 1 foot at
4 seconds.
.SUN NIGHT...SW winds around 5 kt, becoming W around 5 kt after
midnight. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds
and SW 1 foot at 5 seconds.
.MON...N winds around 5 kt. Seas 1 foot or less. Wave Detail: N
1 foot at 3 seconds and SW 1 foot at 5 seconds.
.MON NIGHT...S winds around 5 kt, becoming W after midnight. Seas
1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot
at 5 seconds.
.TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 4 seconds.
.WED AND WED NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
.THU AND THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A
chance of 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.

$$

ANZ254-250900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
405 PM EDT Sat May 24 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY...

.TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: SW 3 ft at 7 seconds and E 3 ft at 9 seconds.
A slight chance of showers this evening.
.SUN...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W
5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: E 3 ft
at 8 seconds and NW 2 ft at 3 seconds.
.SUN NIGHT...W winds around 5 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 9 seconds and N 1 foot at 4 seconds.
.MON...N winds around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds and N 1 foot at 4 seconds.
.MON NIGHT THROUGH TUE NIGHT...W winds 5 to 10 kt. Seas around
2 ft. Wave Detail: N 1 foot at 4 seconds and S 1 foot at
5 seconds.
.WED AND WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: NW 1 foot at 3 seconds and S 1 foot at 3 seconds.
.THU AND THU NIGHT...S winds around 10 kt. Seas 2 to 4 ft. A
chance of 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.

$$

ANZ255-250900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
405 PM EDT Sat May 24 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY...

.TONIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft. Wave Detail: SW 4 ft at 7 seconds and E 3 ft at 9 seconds.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: W 4 ft at 5 seconds and E 2 ft at 8 seconds.
.SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW
3 ft at 6 seconds and E 2 ft at 9 seconds.
.MON...N winds around 5 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 5 seconds and N 1 foot at 4 seconds.
.MON NIGHT...NW winds around 5 kt. Seas around 2 ft in the
evening, then 1 foot or less. Wave Detail: N 1 foot at 3 seconds
and SW 1 foot at 5 seconds, becoming W 1 foot at 2 seconds and N
1 foot at 3 seconds.
.TUE AND TUE NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: N 1 foot at 4 seconds and SW 1 foot at 5 seconds.
.WED AND WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.
.THU AND THU NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. A
chance of 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.

$$

ANZ256-250900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
405 PM EDT Sat May 24 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY...

.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: W 4 ft at 5 seconds and E 2 ft at 8 seconds.
.SUN...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 E 2 ft at 8 seconds.
.SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: W
3 ft at 4 seconds and E 1 foot at 9 seconds.
.MON...N winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: SW 2 ft at 5 seconds and NW 1 foot at
2 seconds.
.MON NIGHT THROUGH TUE NIGHT...SW winds 5 to 10 kt. Seas around
2 ft. Wave Detail: SW 1 foot at 5 seconds and E 1 foot at
9 seconds.
.WED AND WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 2 ft at 4 seconds and SE 1 foot at 9 seconds.
.THU AND THU NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. A
chance of 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.

$$

ANZ232-250900-
Nantucket Sound-
405 PM EDT Sat May 24 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 3 seconds and SW 2 ft at
6 seconds. A slight chance of showers this evening.
.SUN...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W
5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft
at 3 seconds and SW 1 foot at 6 seconds.
.SUN NIGHT...W winds around 5 kt. Seas 1 foot or less. Wave
Detail: N 1 foot at 4 seconds and SW 1 foot at 6 seconds.
.MON...N winds around 5 kt. Seas 1 foot or less. Wave Detail: N
1 foot at 4 seconds and SW 1 foot at 5 seconds.
.MON NIGHT...W winds around 5 kt. Seas 1 foot or less. Wave
Detail: N 1 foot at 3 seconds and SW 1 foot at 5 seconds.
.TUE AND TUE NIGHT...W winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 5 seconds.
.WED AND WED NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
.THU AND THU NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A
chance of 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.

$$

ANZ233-250900-
Vineyard Sound-
405 PM EDT Sat May 24 2025

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

$$

ANZ234-250900-
Buzzards Bay-
405 PM EDT Sat May 24 2025

.TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt this evening.
Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and N 1 foot
at 5 seconds. A slight chance of showers this evening.
.SUN...NW winds 10 to 15 kt, becoming W 5 to 10 kt in the
afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds
and NW 1 foot at 3 seconds.
.SUN NIGHT...W winds around 5 kt. Seas 1 foot or less. Wave
Detail: N 1 foot at 4 seconds and SW 1 foot at 6 seconds.
.MON...N winds around 5 kt, becoming E in the afternoon. Seas
1 foot or less. Wave Detail: N 1 foot at 3 seconds and SW 1 foot
at 5 seconds.
.MON NIGHT...SW winds around 5 kt, becoming W after midnight.
Seas 1 foot or less. Wave Detail: NE 1 foot at 2 seconds and SW
1 foot at 5 seconds.
.TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 3 seconds.
.WED AND WED NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
.THU AND THU NIGHT...S winds 10 to 15 kt. Seas around 2 ft. A
chance of 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.

$$

ANZ235-250900-
Rhode Island Sound-
405 PM EDT Sat May 24 2025

.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: W 3 ft at 5 seconds and SE 2 ft at 8 seconds.
A chance of showers this evening.
.SUN...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 5 seconds and SE 1 foot at
8 seconds.
.SUN NIGHT...NW winds 5 to 10 kt. Seas around 2 ft in the
evening, then 1 foot or less. Wave Detail: W 2 ft at 5 seconds
and SE 1 foot at 9 seconds, becoming W 1 foot at 5 seconds and SE
1 foot at 9 seconds.
.MON...N winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft in the morning, then 1 foot or less. Wave Detail: NW
1 foot at 2 seconds and SW 1 foot at 5 seconds.
.MON NIGHT...SW winds around 5 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 5 seconds and SE 1 foot at 9 seconds.
.TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: SW 1 foot at 5 seconds and SE 1 foot at 9 seconds.
.WED AND WED NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less,
then around 2 ft.
.THU AND THU NIGHT...S winds around 10 kt. Seas 2 to 3 ft. A
chance of 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.

$$

ANZ237-250900-
Block Island Sound-
405 PM EDT Sat May 24 2025

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

$$

ANZ230-250900-
Boston Harbor-
405 PM EDT Sat May 24 2025

.TONIGHT...W winds 5 to 10 kt. Waves around 2 ft.
.SUN...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Waves around 2 ft.
.SUN NIGHT...NW winds around 5 kt. Waves around 2 ft.
.MON...N winds around 5 kt, becoming E in the afternoon. Waves
1 foot or less.
.MON NIGHT...S winds around 5 kt, becoming W after midnight.
Waves 1 foot or less.
.TUE AND TUE NIGHT...W winds 5 to 10 kt. Waves 1 foot or less.
.WED AND WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.THU AND THU NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. A
chance of 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.

$$

ANZ236-250900-
Narragansett Bay-
405 PM EDT Sat May 24 2025

.TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Waves
around 2 ft. A slight chance of showers this evening.
.SUN...NW winds 5 to 10 kt. Waves around 2 ft.
.SUN NIGHT...NW winds around 5 kt. Waves around 2 ft in the
evening, then 1 foot or less.
.MON...N winds around 5 kt, becoming E in the afternoon. Waves
1 foot or less.
.MON NIGHT...SW winds around 5 kt, becoming W after midnight.
Waves 1 foot or less.
.TUE AND TUE NIGHT...W winds 5 to 10 kt. Waves 1 foot or less.
.WED AND WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.THU AND THU NIGHT...S winds 5 to 10 kt. Waves 2 to 3 ft. A
chance of 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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