816
FZUS51 KBOX 020804
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Wed Jul 2 2025

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

ANZ200-022100-
404 AM EDT Wed Jul 2 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Cold front slowly moves offshore Wed night. Another cold front moves
through late Thu into early Fri, followed by high pres into this
weekend into next week.

$$

ANZ250-022100-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
404 AM EDT Wed Jul 2 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM EDT THIS MORNING...

.TODAY...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 4 seconds and SE 2 ft at 9 seconds. Patchy fog this
morning. A slight chance of showers this morning with vsby 1 NM
or less.
.TONIGHT...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 8 seconds.
Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after
midnight.
.THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 8 seconds and SW 1 foot at 3 seconds. A chance of showers in
the afternoon with vsby 1 to 3 NM.
.THU NIGHT...W winds around 10 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at
8 seconds. A chance of showers in the evening.
.FRI AND FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: NW 2 ft at 3 seconds and SE 2 ft at 9 seconds.
.SAT THROUGH SUN...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
8 seconds.
.SUN 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.

$$

ANZ251-022100-
Massachusetts Bay and Ipswich Bay-
404 AM EDT Wed Jul 2 2025

.TODAY...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and E 2 ft at 9 seconds. A slight chance of
showers this morning.
.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 3 seconds and E 2 ft at 8 seconds. Patchy fog. Vsby 1 to
3 NM, decreasing to 1 NM or less after midnight.
.THU...SW winds 5 to 10 kt, becoming S in the afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 8 seconds and SW 1 foot at
3 seconds. A chance of showers in the afternoon.
.THU NIGHT...W winds around 10 kt. Seas around 2 ft. Wave Detail:
W 2 ft at 3 seconds and E 1 foot at 8 seconds. A chance of
showers in the evening.
.FRI AND FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: NW 2 ft at 3 seconds and E 1 foot at 8 seconds.
.SAT THROUGH SUN NIGHT...SW winds 15 to 20 kt with gusts up to
25 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE
2 ft at 7 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.

$$

ANZ231-022100-
Cape Cod Bay-
404 AM EDT Wed Jul 2 2025

.TODAY...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 3 seconds and SE 1 foot at 8 seconds. A chance of
showers with a slight chance of tstms this morning, then a slight
chance of showers this afternoon. Patchy fog this morning with
vsby 1 NM or less.
.TONIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds
and SE 1 foot at 8 seconds. Patchy fog. Vsby 1 to 3 NM.
.THU...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: SW 1 foot at 2 seconds and SE
1 foot at 8 seconds.
.THU NIGHT...W winds around 10 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and SE
1 foot at 8 seconds. A chance of showers in the evening.
.FRI...NW winds around 10 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: NW 1 foot at 3 seconds and SE 1 foot at
8 seconds.
.FRI NIGHT...S winds 5 to 10 kt, becoming NW after midnight. Seas
1 foot or less. Wave Detail: W 1 foot at 4 seconds and E 1 foot
at 6 seconds.
.SAT AND SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.
.SUN AND SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 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.

$$

ANZ254-022100-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
404 AM EDT Wed Jul 2 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM EDT THIS MORNING...

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

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.

$$

ANZ255-022100-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
404 AM EDT Wed Jul 2 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.TODAY...SW winds 10 to 15 kt. Gusts up to 20 kt this morning.
Seas 3 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and E 1 foot at
9 seconds. Patchy fog. A chance of showers. A chance of tstms
this morning, then a slight chance of tstms this afternoon. Vsby
1 NM or less.
.TONIGHT...SW winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: S
5 ft at 7 seconds and E 1 foot at 8 seconds. Patchy fog. A chance
of showers after midnight. Vsby 1 NM or less.
.THU...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft
at 7 seconds and E 1 foot at 8 seconds. Patchy fog in the morning
with vsby 1 to 3 NM.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming W after midnight. Seas 3 to 4 ft. Wave Detail: S 4 ft at
7 seconds and SE 1 foot at 8 seconds.
.FRI...NW winds around 10 kt, becoming W in the afternoon. Seas
3 to 4 ft. Wave Detail: S 4 ft at 8 seconds and SE 2 ft at
8 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and SE 2 ft at
8 seconds.
.SAT THROUGH SUN...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft.
.SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 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.

$$

ANZ256-022100-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
404 AM EDT Wed Jul 2 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.TODAY...SW winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: S
5 ft at 7 seconds and E 1 foot at 9 seconds. Patchy fog. A chance
of showers with a slight chance of tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 3 to 5 ft. Wave Detail: S 4 ft at 7 seconds and E
1 foot at 8 seconds. Patchy fog. Vsby 1 NM or less, increasing to
1 to 3 NM after midnight.
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: S 3 ft
at 7 seconds and E 1 foot at 8 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Seas 3 to 4 ft. Wave Detail: SW 4 ft at
7 seconds and SE 3 ft at 8 seconds.
.FRI...NW winds around 10 kt, becoming W in the afternoon. Seas
3 to 4 ft. Wave Detail: W 4 ft at 7 seconds and SE 3 ft at
8 seconds.
.FRI NIGHT...W winds around 10 kt, becoming NW after midnight.
Seas around 3 ft. Wave Detail: SW 3 ft at 8 seconds and SE 1 foot
at 8 seconds.
.SAT THROUGH SUN...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft.
.SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 5 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.

$$

ANZ232-022100-
Nantucket Sound-
404 AM EDT Wed Jul 2 2025

.TODAY...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 4 seconds and SE 1 foot at 9 seconds. Patchy fog. A
chance of showers. A chance of tstms this morning. Vsby 1 NM or
less, increasing to 1 to 3 NM this afternoon.
.TONIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 4 seconds and SE 1 foot at 8 seconds. Patchy fog. Vsby
1 NM or less, increasing to 1 to 3 NM after midnight.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot
at 8 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.THU NIGHT...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
4 seconds and SE 1 foot at 8 seconds.
.FRI...NW winds around 10 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: NW 2 ft at 4 seconds and SE 1 foot at
8 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: SW 1 foot at 4 seconds and SE
1 foot at 8 seconds.
.SAT THROUGH SUN 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.

$$

ANZ233-022100-
Vineyard Sound-
404 AM EDT Wed Jul 2 2025

.TODAY...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW
3 ft at 7 seconds and SE 1 foot at 9 seconds. Patchy fog. A
slight chance of tstms. Showers likely this morning, then a
chance of showers this afternoon. Vsby 1 NM or less, increasing
to 1 to 3 NM this afternoon.
.TONIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds.
Patchy fog. Vsby 1 to 3 NM.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 7 seconds and SE 1 foot
at 8 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.THU NIGHT...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
5 seconds and SE 2 ft at 8 seconds.
.FRI...NW winds around 10 kt, becoming W in the afternoon. Seas
around 2 ft. Wave Detail: S 2 ft at 7 seconds.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft. Wave Detail: S 2 ft at 7 seconds.
.SAT AND SAT NIGHT...SW winds 10 to 15 kt. Seas around 2 ft.
.SUN AND SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 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.

$$

ANZ234-022100-
Buzzards Bay-
404 AM EDT Wed Jul 2 2025

.TODAY...SW winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and SE 1 foot
at 9 seconds. Patchy fog. A chance of showers with a slight
chance of tstms. Vsby 1 NM or less, increasing to 1 to 3 NM this
afternoon.
.TONIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and
SE 1 foot at 8 seconds. Patchy fog. Vsby 1 NM or less, increasing
to 1 to 3 NM after midnight.
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW
2 ft at 7 seconds and SE 1 foot at 8 seconds.
.THU NIGHT...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
5 seconds and SE 1 foot at 8 seconds.
.FRI...NW winds around 10 kt, becoming W in the afternoon. Seas
around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at
8 seconds.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at
7 seconds.
.SAT AND SAT NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt.
Seas around 2 ft.
.SUN AND SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 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.

$$

ANZ235-022100-
Rhode Island Sound-
404 AM EDT Wed Jul 2 2025

.TODAY...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S
4 ft at 7 seconds and SE 1 foot at 9 seconds. Patchy fog. A
slight chance of tstms. A chance of showers this morning, then a
slight chance of showers this afternoon. Vsby 1 NM or less.
.TONIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and SE
1 foot at 8 seconds. Patchy fog. Vsby 1 NM or less, increasing to
1 to 3 NM after midnight.
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 7 seconds and SE 1 foot at 8 seconds. Patchy fog in the
morning with vsby 1 to 3 NM.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at
7 seconds and SE 2 ft at 9 seconds.
.FRI...NW winds around 10 kt, becoming W in the afternoon. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 7 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 SE 2 ft at
8 seconds.
.SAT THROUGH SUN NIGHT...SW winds 15 to 20 kt with gusts up to
25 kt. Seas 2 to 4 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.

$$

ANZ237-022100-
Block Island Sound-
404 AM EDT Wed Jul 2 2025

.TODAY...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SW
4 ft at 7 seconds and SE 3 ft at 8 seconds. Patchy fog. A chance
of showers with a slight chance of tstms. Vsby 1 NM or less,
increasing to 1 to 3 NM this afternoon.
.TONIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SW
4 ft at 7 seconds and SE 2 ft at 8 seconds. Patchy fog. Vsby 1 to
3 NM, decreasing to 1 NM or less after midnight.
.THU...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at
7 seconds and SE 2 ft at 8 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at
6 seconds and SE 2 ft at 8 seconds.
.FRI...NW winds around 10 kt, becoming W in the afternoon. Seas
2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and W 2 ft at
5 seconds.
.FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas
2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and SE 2 ft at
8 seconds.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to
25 kt. Seas 2 to 4 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.

$$

ANZ230-022100-
Boston Harbor-
404 AM EDT Wed Jul 2 2025

.TODAY...SW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft this afternoon. A slight chance of showers this morning.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.THU...SW winds 5 to 10 kt. Waves 1 foot or less. A chance of
showers in the afternoon.
.THU NIGHT...W winds around 10 kt. Waves 1 foot or less. A chance
of showers in the evening.
.FRI AND FRI NIGHT...NW winds 5 to 10 kt. Waves around 2 ft.
.SAT THROUGH SUN NIGHT...SW winds 15 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.

$$

ANZ236-022100-
Narragansett Bay-
404 AM EDT Wed Jul 2 2025

.TODAY...SW winds 5 to 10 kt. Waves 2 to 3 ft. A slight chance of
tstms. A chance of showers this morning, then a slight chance of
showers this afternoon. Patchy fog this morning with vsby 1 to
3 NM.
.TONIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Patchy fog.
Vsby 1 to 3 NM.
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Waves around 2 ft.
.THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight.
Waves around 2 ft.
.FRI...NW winds 5 to 10 kt. Waves around 2 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves around 2 ft.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to
25 kt. Waves 2 to 3 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.

$$

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