610
FZUS51 KBOX 240205
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1005 PM EDT Wed Jul 23 2025

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

ANZ200-241500-
1005 PM EDT Wed Jul 23 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres moves offshore into Thu. A weak front will move into New
Eng on Fri, crossing the waters Fri night into Sat. Low pressure
crosses the waters Monday.

$$

ANZ250-241500-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1005 PM EDT Wed Jul 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY AFTERNOON THROUGH
FRIDAY MORNING...

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

$$

ANZ251-241500-
Massachusetts Bay and Ipswich Bay-
1005 PM EDT Wed Jul 23 2025

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

$$

ANZ231-241500-
Cape Cod Bay-
1005 PM EDT Wed Jul 23 2025

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

$$

ANZ254-241500-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1005 PM EDT Wed Jul 23 2025

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

$$

ANZ255-241500-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1005 PM EDT Wed Jul 23 2025

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

$$

ANZ256-241500-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1005 PM EDT Wed Jul 23 2025

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

$$

ANZ232-241500-
Nantucket Sound-
1005 PM EDT Wed Jul 23 2025

.OVERNIGHT...SW winds 10 to 15 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 3 seconds and SE 1 foot at 8 seconds.
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 4 seconds and SE 1 foot at 7 seconds.
.THU NIGHT...SW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail:
SW 3 ft at 4 seconds and SE 1 foot at 7 seconds.
.FRI...SW winds 15 to 20 kt with gusts up to 25 kt. Seas around
3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at
8 seconds. A chance of showers in the afternoon.
.FRI NIGHT...SW winds 15 to 20 kt, becoming NW 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft
at 4 seconds and SE 1 foot at 9 seconds. A chance of showers in
the evening.
.SAT AND SAT NIGHT...E winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and SW 1 foot at
6 seconds.
.SUN...SE winds 10 to 15 kt. Seas around 2 ft.
.SUN NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. A chance of
showers.
.MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
becoming SW. 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.

$$

ANZ233-241500-
Vineyard Sound-
1005 PM EDT Wed Jul 23 2025

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

$$

ANZ234-241500-
Buzzards Bay-
1005 PM EDT Wed Jul 23 2025

.OVERNIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 3 seconds and SE 1 foot at 8 seconds.
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas around 2 ft, building to 3 to
4 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and SE
1 foot at 7 seconds, becoming SW 2 ft at 4 seconds and SE 1 foot
at 7 seconds.
.THU 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
7 seconds.
.FRI...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at
8 seconds. A chance of showers in the afternoon.
.FRI NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt,
becoming NW 10 to 15 kt after midnight. Seas 2 to 4 ft. Wave
Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance
of showers in the evening.
.SAT AND SAT NIGHT...E winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and SW 2 ft at
6 seconds.
.SUN...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. A chance of showers.
.MON AND MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt,
becoming SW. 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.

$$

ANZ235-241500-
Rhode Island Sound-
1005 PM EDT Wed Jul 23 2025

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

$$

ANZ237-241500-
Block Island Sound-
1005 PM EDT Wed Jul 23 2025

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

$$

ANZ230-241500-
Boston Harbor-
1005 PM EDT Wed Jul 23 2025

.OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves
around 2 ft.
.THU...SW winds 10 to 15 kt. Gusts up to 25 kt in the afternoon.
Waves around 2 ft.
.THU NIGHT...SW winds around 15 kt with gusts up to 25 kt. Waves
around 2 ft.
.FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft. A chance of showers and tstms in the afternoon. Some tstms
may produce gusty winds and heavy rainfall in the afternoon.
.FRI NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Waves around 2 ft. A chance of showers and
tstms in the evening. Some tstms may produce gusty winds and
heavy rainfall in the evening.
.SAT AND SAT NIGHT...S winds 5 to 10 kt. Waves around 2 ft.
.SUN AND SUN NIGHT...S winds 10 to 15 kt, becoming SW. Gusts up
to 20 kt. Waves around 2 ft. A chance of showers.
.MON AND MON NIGHT...NE winds around 10 kt, becoming S. Waves
around 2 ft, then 1 foot or less.

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.

$$

ANZ236-241500-
Narragansett Bay-
1005 PM EDT Wed Jul 23 2025

.OVERNIGHT...SW winds 5 to 10 kt. Waves around 2 ft.
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 25 kt in the afternoon. Waves 2 to 3 ft.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves
2 to 3 ft.
.FRI...SW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to
3 ft. A chance of showers in the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming NW after midnight. Waves 2 to 3 ft. A chance of showers
in the evening.
.SAT AND SAT NIGHT...SE winds 10 to 15 kt. Waves around 2 ft.
.SUN...SE winds 5 to 10 kt. Waves around 2 ft.
.SUN NIGHT...SW winds around 10 kt. Waves around 2 ft. A chance
of showers.
.MON AND MON NIGHT...NW winds around 10 kt, becoming SW. 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.

$$

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