261
FZUS51 KBOX 030804
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
403 AM EDT Thu Jul 3 2025

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

ANZ200-032100-
403 AM EDT Thu Jul 3 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Another cold front moves through late today into early Fri with
potential for a few showers and storms over the waters. High pres
into this weekend into next week.

$$

ANZ250-032100-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
403 AM EDT Thu Jul 3 2025

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

$$

ANZ251-032100-
Massachusetts Bay and Ipswich Bay-
403 AM EDT Thu Jul 3 2025

.TODAY...W winds around 5 kt, becoming S this afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 8 seconds and SW 1 foot at
3 seconds. A chance of showers with isolated tstms this
afternoon. Some tstms may produce gusty winds this afternoon.
.TONIGHT...NW winds around 10 kt. Seas around 2 ft. Wave Detail:
W 1 foot at 2 seconds and S 1 foot at 4 seconds. A chance of
showers in the evening.
.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...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
NW 1 foot at 2 seconds and SE 1 foot at 6 seconds.
.SAT...W winds 5 to 10 kt, becoming S in the afternoon. Seas
around 2 ft. Wave Detail: NW 1 foot at 2 seconds and S 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: S 2 ft at 3 seconds and NW 1 foot at
3 seconds.
.SUN THROUGH MON NIGHT...SW winds 15 to 20 kt with gusts up to
25 kt. Seas 2 to 3 ft.

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.

$$

ANZ231-032100-
Cape Cod Bay-
403 AM EDT Thu Jul 3 2025

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

$$

ANZ254-032100-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
403 AM EDT Thu Jul 3 2025

.TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt this afternoon. Seas 2 to 4 ft. Wave Detail: S
3 ft at 7 seconds and W 1 foot at 3 seconds. Patchy fog this
morning with vsby 1 NM or less.
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Seas 2 to 4 ft. Wave Detail: S 3 ft at
7 seconds and W 1 foot at 3 seconds.
.FRI...NW winds 5 to 10 kt. Seas 2 to 3 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 W after midnight. Seas
2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and NW 1 foot at
3 seconds.
.SAT AND SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and NW 1 foot at
3 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 4 seconds and SE
2 ft at 14 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.

$$

ANZ255-032100-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
403 AM EDT Thu Jul 3 2025

.TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt this afternoon. Seas 3 to 4 ft. Wave Detail: S
4 ft at 7 seconds and E 1 foot at 8 seconds. Patchy fog this
morning with vsby 1 NM or less.
.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 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.
.FRI...N winds around 10 kt, becoming W 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...SW winds around 10 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and E 1 foot at
8 seconds.
.SAT AND SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and NW 1 foot at
3 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 4 ft at 5 seconds and SE
1 foot at 8 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.

$$

ANZ256-032100-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
403 AM EDT Thu Jul 3 2025

.TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 3 to 4 ft. Wave Detail: S 4 ft
at 7 seconds and E 1 foot at 8 seconds. Patchy fog this morning
with vsby 1 NM or less.
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Seas 3 to 4 ft. Wave Detail: S 4 ft at
7 seconds and E 1 foot at 9 seconds.
.FRI...N winds around 10 kt, becoming W in the afternoon. Seas
around 3 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 NW 5 to 10 kt after
midnight. Seas around 3 ft. Wave Detail: S 3 ft at 8 seconds and
E 2 ft at 8 seconds.
.SAT AND SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and NW 1 foot at
3 seconds.
.SUN THROUGH MON NIGHT...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.

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.

$$

ANZ232-032100-
Nantucket Sound-
403 AM EDT Thu Jul 3 2025

.TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt this afternoon. Seas around 2 ft. Wave Detail:
S 2 ft at 7 seconds and W 1 foot at 3 seconds. Patchy fog this
morning with vsby 1 NM or less.
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Seas around 2 ft. Wave Detail: S 2 ft at
7 seconds and W 1 foot at 3 seconds.
.FRI...N winds around 10 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: NW 1 foot at 2 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: NW 1 foot at 3 seconds and S
1 foot at 6 seconds.
.SAT AND SAT NIGHT...SW 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 8 seconds.
.SUN THROUGH 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.

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.

$$

ANZ233-032100-
Vineyard Sound-
403 AM EDT Thu Jul 3 2025

.TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 7 seconds and W 1 foot at 3 seconds. Patchy fog this
morning with vsby 1 NM or less.
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at
6 seconds and W 1 foot at 3 seconds. A chance of showers in the
evening.
.FRI...NW winds around 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...SW winds 5 to 10 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and W 1 foot
at 3 seconds.
.SAT AND SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and NW 1 foot
at 3 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 4 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.

$$

ANZ234-032100-
Buzzards Bay-
403 AM EDT Thu Jul 3 2025

.TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 7 seconds and W 1 foot at 3 seconds. Patchy fog this
morning with vsby 1 NM or less.
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at
4 seconds and E 1 foot at 8 seconds. A chance of showers in the
evening.
.FRI...NW winds around 10 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: SW 2 ft at 7 seconds and NW 1 foot at
2 seconds.
.FRI NIGHT...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.
.SAT AND SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and NW 1 foot
at 3 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 4 seconds and SE
1 foot at 8 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.

$$

ANZ235-032100-
Rhode Island Sound-
403 AM EDT Thu Jul 3 2025

.TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: S
3 ft at 7 seconds and SW 1 foot at 2 seconds. Patchy fog this
morning with vsby 1 NM or less.
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 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.
.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 10 to 15 kt, becoming NW 5 to 10 kt after
midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and SE
2 ft at 8 seconds.
.SAT AND SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and NW 1 foot at
3 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 4 ft at 4 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.

$$

ANZ237-032100-
Block Island Sound-
403 AM EDT Thu Jul 3 2025

.TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 7 seconds and W 1 foot at 2 seconds. Patchy fog this morning
with vsby 1 NM or less.
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 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. A chance of showers in the
evening.
.FRI...N winds around 10 kt, becoming W in the afternoon. Seas
2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and W 1 foot at
2 seconds.
.FRI NIGHT...W 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.
.SAT AND SAT NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 7 seconds and NW 1 foot at 2 seconds.
.SUN THROUGH MON 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.

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.

$$

ANZ230-032100-
Boston Harbor-
403 AM EDT Thu Jul 3 2025

.TODAY...SW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft this afternoon. A chance of showers with isolated tstms this
afternoon. Some tstms may produce gusty winds this afternoon.
.TONIGHT...NW winds around 10 kt. Waves around 2 ft in the
evening, then 1 foot or less. A chance of showers in the evening.
.FRI...NW winds around 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less.
.SAT...W winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less.
.SAT NIGHT...SW winds around 10 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.

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.

$$

ANZ236-032100-
Narragansett Bay-
403 AM EDT Thu Jul 3 2025

.TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt this afternoon. Waves around 2 ft.
.TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. 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 AND SAT NIGHT...SW winds 5 to 10 kt. Waves around 2 ft.
.SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to
25 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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