910
FZUS51 KBOX 040507
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
107 AM EDT Fri Jul 4 2025

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

ANZ200-041800-
107 AM EDT Fri Jul 4 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pressure builds over the region today and Sat, then settles
south of the region Sun into next week. Low pressure approaches
middle of next week.

$$

ANZ250-041800-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 2 ft at 7 seconds and W 1 foot at 3 seconds.
.FRI...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 SE 2 ft at 7 seconds.
.FRI NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 8 seconds and NW 1 foot at 3 seconds.
.SAT...W winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and
NW 1 foot at 3 seconds.
.SAT NIGHT AND SUN...S winds 15 to 20 kt with gusts up to 30 kt.
Seas 2 to 4 ft. Wave Detail: S 4 ft at 4 seconds and NW 1 foot at
3 seconds.
.SUN NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas
3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at
8 seconds.
.MON AND MON NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft.
.TUE AND TUE NIGHT...SW 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.

$$

ANZ251-041800-
Massachusetts Bay and Ipswich Bay-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: W 1 foot at 2 seconds and S 1 foot at 3 seconds.
.FRI...NW winds around 10 kt. Seas around 2 ft. Wave Detail: NW
1 foot at 2 seconds and SE 1 foot at 7 seconds.
.FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
NW 1 foot at 3 seconds and S 1 foot at 4 seconds.
.SAT...W winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 6 seconds
and NW 1 foot at 3 seconds.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 15 to 20 kt with gusts up
to 25 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and NW
1 foot at 3 seconds.
.MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at
8 seconds.
.MON NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 3 ft. A chance of showers.
.TUE AND TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt,
becoming W. Seas around 2 ft. A chance of showers and tstms. Vsby
1 to 3 NM.

Winds and seas higher in and near tstms.

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.

$$

ANZ231-041800-
Cape Cod Bay-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 7 seconds and W 1 foot at 2 seconds.
.FRI...NW winds 5 to 10 kt with gusts up to 20 kt, becoming NE in
the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 8 seconds
and NW 1 foot at 3 seconds.
.FRI NIGHT...S winds 5 to 10 kt, becoming NW after midnight. Seas
1 foot or less. Wave Detail: NW 1 foot at 3 seconds and SE 1 foot
at 4 seconds.
.SAT...W winds around 5 kt, becoming S in the afternoon. Seas
1 foot or less, then around 2 ft in the afternoon. Wave Detail:
NW 1 foot at 3 seconds and S 1 foot at 7 seconds, becoming NW
1 foot at 3 seconds and SE 1 foot at 7 seconds.
.SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: SW 1 foot at 3 seconds and NW 1 foot at
3 seconds.
.SUN AND SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot
at 8 seconds.
.MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 4 ft.
.TUE AND TUE NIGHT...SW 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.

$$

ANZ254-041800-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas 2 to 4 ft. Wave
Detail: S 3 ft at 8 seconds and W 1 foot at 3 seconds. Areas of
fog. Vsby 1 NM or less.
.FRI...NW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft
at 8 seconds and NW 1 foot at 3 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and S 2 ft at
8 seconds.
.SAT...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and SE 2 ft at
8 seconds.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 15 to 20 kt with gusts up
to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 5 seconds and NW
1 foot at 3 seconds.
.MON AND MON NIGHT...SW winds around 15 kt with gusts up to
25 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE
1 foot at 8 seconds.
.TUE AND TUE NIGHT...SW winds 10 to 15 kt with 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.

$$

ANZ255-041800-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft. Wave
Detail: S 4 ft at 8 seconds and W 1 foot at 3 seconds. Areas of
fog. Vsby 1 NM or less.
.FRI...NW winds around 10 kt, becoming W in the afternoon. Seas
3 to 4 ft. Wave Detail: S 3 ft at 8 seconds and SE 2 ft at
8 seconds.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and SE 2 ft at
8 seconds.
.SAT...NW winds around 5 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and SE 1 foot at
8 seconds.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 15 to 20 kt with gusts up
to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and
SE 1 foot at 8 seconds.
.MON AND MON NIGHT...SW winds around 15 kt with gusts up to
20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE
1 foot at 8 seconds.
.TUE AND TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt.
Seas 3 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.

$$

ANZ256-041800-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...W winds around 10 kt. Seas 3 to 4 ft. Wave
Detail: S 4 ft at 8 seconds and W 1 foot at 3 seconds.
.FRI...NW winds around 10 kt, becoming W in the afternoon. Seas
3 to 4 ft. Wave Detail: S 3 ft at 8 seconds and NW 1 foot at
2 seconds.
.FRI NIGHT...W winds 10 to 15 kt, becoming N 5 to 10 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and W
1 foot at 3 seconds.
.SAT...NW winds around 5 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and NW 1 foot at
3 seconds.
.SAT NIGHT THROUGH SUN 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
SE 1 foot at 8 seconds.
.MON...SW winds around 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at
8 seconds.
.MON NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. A chance of showers.
.TUE AND TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 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.

$$

ANZ232-041800-
Nantucket Sound-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 7 seconds and W 1 foot at 3 seconds.
.FRI...NW winds around 10 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: NW 1 foot at 3 seconds and S 1 foot at
7 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and S 1 foot
at 7 seconds.
.SAT...W winds around 5 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: NW 1 foot at 2 seconds and S 1 foot at
7 seconds.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 15 to 20 kt with gusts up
to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and
SE 1 foot at 8 seconds.
.MON AND MON NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot
at 8 seconds.
.TUE AND TUE NIGHT...SW winds 10 to 15 kt with 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.

$$

ANZ233-041800-
Vineyard Sound-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: S 2 ft at 7 seconds and W 1 foot at 3 seconds.
.FRI...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.
.FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas
around 2 ft. Wave Detail: S 2 ft at 7 seconds and W 1 foot at
3 seconds.
.SAT...NW winds around 5 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.
.SAT NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and
SE 1 foot at 8 seconds.
.SUN AND SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot
at 8 seconds.
.MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 3 ft.
.TUE AND TUE NIGHT...SW 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.

$$

ANZ234-041800-
Buzzards Bay-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 2 ft at 7 seconds and W 1 foot at 3 seconds.
.FRI...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: SW 2 ft at 7 seconds and NW 1 foot at
3 seconds.
.FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 6 seconds and W 1 foot at 3 seconds.
.SAT...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft
at 5 seconds and NW 1 foot at 3 seconds.
.SAT NIGHT...SW winds 10 to 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
8 seconds.
.SUN AND SUN NIGHT...SW 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 SE 1 foot
at 8 seconds.
.MON AND MON NIGHT...SW winds 15 to 20 kt, diminishing to 10 to
15 kt. Gusts up to 25 kt. Seas 2 to 4 ft.
.TUE AND TUE NIGHT...SW 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.

$$

ANZ235-041800-
Rhode Island Sound-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: S 3 ft at 8 seconds and W 1 foot at 3 seconds.
.FRI...NW winds around 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and NW 1 foot at
2 seconds.
.FRI NIGHT...W winds around 10 kt, becoming N after midnight.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at
3 seconds.
.SAT...NW winds around 5 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.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 15 to 20 kt with gusts up
to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and
SE 1 foot at 8 seconds.
.MON...SW winds around 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at
8 seconds.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of showers.
.TUE AND TUE NIGHT...SW 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.

$$

ANZ237-041800-
Block Island Sound-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: S 3 ft at 8 seconds and W 1 foot at 3 seconds.
.FRI...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and W 1 foot at
3 seconds.
.FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas
2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and W 1 foot at
3 seconds.
.SAT...NW winds around 5 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: S 2 ft at 7 seconds and NW 1 foot at
2 seconds.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up
to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and
SE 1 foot at 8 seconds.
.MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at
8 seconds.
.MON NIGHT THROUGH TUE NIGHT...SW winds 10 to 15 kt with 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.

$$

ANZ230-041800-
Boston Harbor-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...W winds 5 to 10 kt. Waves 1 foot or less.
.FRI...NW winds 5 to 10 kt. Waves around 2 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves around 2 ft in the
evening, then 1 foot or less.
.SAT...W winds around 5 kt, becoming S in the afternoon. Waves
1 foot or less, then around 2 ft in the afternoon.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 15 to 20 kt with gusts up
to 25 kt. Waves around 2 ft.
.MON...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves
around 2 ft. A chance of showers.
.TUE AND TUE NIGHT...SW winds around 10 kt, becoming W. Waves
around 2 ft, then 1 foot or less. A chance of showers and tstms.

Winds and waves higher in and near tstms.

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.

$$

ANZ236-041800-
Narragansett Bay-
107 AM EDT Fri Jul 4 2025

.REST OF TONIGHT...NW winds 5 to 10 kt. Waves around 2 ft.
.FRI...NW winds 5 to 10 kt, becoming W in the afternoon. Waves
around 2 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves around 2 ft.
.SAT...NW winds around 5 kt, becoming SW 10 to 15 kt in the
afternoon. Waves around 2 ft.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up
to 25 kt. Waves 2 to 3 ft.
.MON...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves
2 to 3 ft. A chance of showers.
.TUE AND TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt.
Waves around 2 ft. A chance of showers and tstms.

Winds and waves higher in and near tstms.

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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