215
FZUS51 KBOX 240804
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
403 AM EDT Tue Jun 24 2025

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

ANZ200-242100-
403 AM EDT Tue Jun 24 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Surface high pressure remains in control through mid week. A cold
front drops south out of Canada on Wednesday with pop-up showers and
thunderstorms. Cold front remains south of the southern waters late
this week and will be a source for shower activity. An area of high
pressure exits eastern Canada late this week and brings gusty
northeasterly flow into early this weekend.

$$

ANZ250-242100-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
403 AM EDT Tue Jun 24 2025

.TODAY...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 3 seconds and E 2 ft at 9 seconds.
.TONIGHT...W winds around 10 kt. Seas around 2 ft. Wave Detail: W
2 ft at 3 seconds and E 1 foot at 9 seconds.
.WED...NW winds around 10 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: NW 2 ft at 3 seconds and E 2 ft at
9 seconds.
.WED NIGHT...S winds 5 to 10 kt, becoming NE 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: NE
3 ft at 8 seconds and W 1 foot at 3 seconds.
.THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: NE 3 ft at 5 seconds. A chance of showers.
.THU NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 6 seconds.
.FRI...E winds around 10 kt. Seas 2 to 3 ft.
.FRI NIGHT AND SAT...SE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. A chance of showers. Vsby 1 to 3 NM.
.SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ251-242100-
Massachusetts Bay and Ipswich Bay-
403 AM EDT Tue Jun 24 2025

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

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.

$$

ANZ231-242100-
Cape Cod Bay-
403 AM EDT Tue Jun 24 2025

.TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt this afternoon.
Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and E
1 foot at 8 seconds.
.TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Seas around 2 ft in the evening, then 1 foot or less. Wave
Detail: SW 1 foot at 3 seconds and E 1 foot at 9 seconds,
becoming W 1 foot at 3 seconds and E 1 foot at 9 seconds.
.WED...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas
1 foot or less. Wave Detail: NW 1 foot at 3 seconds and E 1 foot
at 9 seconds.
.WED NIGHT...SE winds around 5 kt, becoming NE 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 1 foot or less, then
around 2 ft after midnight. Wave Detail: NW 1 foot at 3 seconds
and E 1 foot at 7 seconds, becoming N 1 foot at 3 seconds and NE
1 foot at 7 seconds.
.THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: NE 2 ft at 4 seconds. A chance of showers.
.THU NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
NE 2 ft at 5 seconds.
.FRI...E winds around 10 kt. Seas around 2 ft.
.FRI NIGHT AND SAT...SE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. A chance of showers.
.SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ254-242100-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
403 AM EDT Tue Jun 24 2025

.TODAY...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 E 2 ft at 9 seconds.
Patchy fog. Vsby 1 NM or less this morning.
.TONIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
9 seconds.
.WED...NW winds 5 to 10 kt, becoming N in the afternoon. Seas
around 2 ft. Wave Detail: NW 2 ft at 4 seconds and E 1 foot at
9 seconds.
.WED NIGHT...SE winds around 5 kt, becoming NE 10 to 15 kt with
gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail:
SW 2 ft at 4 seconds and NE 2 ft at 8 seconds.
.THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: NE 3 ft at 5 seconds and SW 1 foot at
4 seconds. A chance of showers.
.THU NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NE
3 ft at 6 seconds.
.FRI...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft.
.FRI NIGHT AND SAT...SE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. A chance of showers.
.SAT NIGHT...S 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.

$$

ANZ255-242100-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
403 AM EDT Tue Jun 24 2025

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

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.

$$

ANZ256-242100-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
403 AM EDT Tue Jun 24 2025

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

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.

$$

ANZ232-242100-
Nantucket Sound-
403 AM EDT Tue Jun 24 2025

.TODAY...SW winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at
9 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
W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and SE 1 foot at 9 seconds.
.WED...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: W 1 foot at 3 seconds and SE 1 foot at
8 seconds. Scattered showers and tstms in the afternoon.
.WED NIGHT...SE winds around 5 kt, becoming NE 10 to 15 kt after
midnight. Seas 1 foot or less, then around 2 ft after midnight.
Wave Detail: SW 1 foot at 4 seconds and E 1 foot at 6 seconds,
becoming E 2 ft at 6 seconds and SW 1 foot at 4 seconds.
Scattered showers after midnight.
.THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: NE 2 ft at 4 seconds and SW 1 foot at
4 seconds. A chance of showers.
.THU NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds.
.FRI...E winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.FRI NIGHT AND SAT...SE winds 15 to 20 kt. Seas 2 to 3 ft. A
chance of showers.
.SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of showers.

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.

$$

ANZ233-242100-
Vineyard Sound-
403 AM EDT Tue Jun 24 2025

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

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.

$$

ANZ234-242100-
Buzzards Bay-
403 AM EDT Tue Jun 24 2025

.TODAY...SW winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot
at 9 seconds. Patchy fog this morning.
.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming
W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and SE 1 foot at 9 seconds.
.WED...NW winds 5 to 10 kt, becoming SE in the afternoon. Seas
1 foot or less, then around 2 ft in the afternoon. Wave Detail: W
1 foot at 4 seconds and SE 1 foot at 9 seconds, becoming SW
1 foot at 4 seconds and E 1 foot at 9 seconds. Scattered showers
and tstms.
.WED NIGHT...S winds around 5 kt, becoming NE 10 to 15 kt after
midnight. Seas 1 foot or less, then around 2 ft after midnight.
Wave Detail: S 1 foot at 5 seconds, becoming SW 1 foot at
4 seconds and E 1 foot at 6 seconds. Scattered showers after
midnight.
.THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: NE 2 ft at 3 seconds and SW 1 foot at
4 seconds. A chance of showers.
.THU NIGHT...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
NE 1 foot at 3 seconds.
.FRI...E winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.FRI NIGHT AND SAT...SE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. A chance of showers.
.SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. A chance of showers.

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.

$$

ANZ235-242100-
Rhode Island Sound-
403 AM EDT Tue Jun 24 2025

.TODAY...SW winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot
at 9 seconds. Patchy fog this morning with vsby 1 to 3 NM.
.TONIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot
at 9 seconds.
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at
9 seconds. Scattered showers and tstms.
.WED NIGHT...SE winds around 5 kt, becoming E 10 to 15 kt after
midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and
S 1 foot at 4 seconds. Scattered showers. Scattered tstms in the
evening.
.THU AND THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: E 2 ft at 5 seconds and S 1 foot
at 4 seconds. A chance of showers.
.FRI...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: E 3 ft at 6 seconds.
.FRI NIGHT AND SAT...SE winds around 15 kt with gusts up to
20 kt. Seas 2 to 4 ft. A chance of showers.
.SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft. A chance of showers.

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.

$$

ANZ237-242100-
Block Island Sound-
403 AM EDT Tue Jun 24 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 4 seconds and SE 1 foot at 9 seconds. Patchy fog this
morning with vsby 1 to 3 NM.
.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming
W 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: W
2 ft at 4 seconds and SE 1 foot at 9 seconds.
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
around 2 ft. Wave Detail: W 1 foot at 4 seconds and SE 1 foot at
10 seconds. Scattered showers and tstms in the afternoon.
.WED NIGHT...S winds around 5 kt, becoming E 10 to 15 kt after
midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and
S 1 foot at 4 seconds. Scattered showers. Scattered tstms in the
evening.
.THU AND THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: E 3 ft at 5 seconds and S 1 foot at
4 seconds. A chance of showers.
.FRI THROUGH SAT...SE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. Wave Detail: E 4 ft at 7 seconds and S 1 foot at
4 seconds. A chance of showers.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. A chance of
showers.

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.

$$

ANZ230-242100-
Boston Harbor-
403 AM EDT Tue Jun 24 2025

.TODAY...W winds around 10 kt. Gusts up to 20 kt this afternoon.
Waves 1 foot or less, then around 2 ft this afternoon.
.TONIGHT...W winds 5 to 10 kt. Waves around 2 ft in the evening,
then 1 foot or less.
.WED...NW winds 5 to 10 kt, becoming E in the afternoon. Waves
1 foot or less.
.WED NIGHT...E winds around 5 kt, becoming NE 10 to 15 kt after
midnight. Waves 1 foot or less, then around 2 ft after midnight.
.THU...NE winds 10 to 15 kt. Waves around 2 ft. A chance of
showers.
.THU NIGHT...NE winds 5 to 10 kt. Waves 1 foot or less.
.FRI...E winds 10 to 15 kt. Waves around 2 ft.
.FRI NIGHT...SE winds 10 to 15 kt. Waves around 2 ft. A chance of
showers.
.SAT AND SAT NIGHT...SE winds 10 to 15 kt, becoming SW. Gusts up
to 20 kt. Waves 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.

$$

ANZ236-242100-
Narragansett Bay-
403 AM EDT Tue Jun 24 2025

.TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt this afternoon.
Waves 1 foot or less, then around 2 ft this afternoon.
.TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Waves around 2 ft.
.WED...NW winds around 5 kt, becoming SW in the afternoon. Waves
1 foot or less. Scattered showers and tstms.
.WED NIGHT...S winds around 5 kt, becoming NE after midnight.
Waves 1 foot or less, then around 2 ft after midnight. Scattered
showers. Scattered tstms in the evening.
.THU AND THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft. A chance of showers.
.FRI...E winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft.
.FRI NIGHT AND SAT...SE winds 10 to 15 kt. Gusts up to 20 kt.
Waves around 2 ft. A chance of showers.
.SAT NIGHT...SW winds around 10 kt. Waves around 2 ft. A chance
of showers.

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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