274
FZUS51 KBOX 011104
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
703 AM EDT Mon Sep 1 2025

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

ANZ200-020000-
703 AM EDT Mon Sep 1 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pressure will continue to dominate through the middle of next
week. Expect dry conditions and winds less than 25 kts through
Thursday, although seas may start to build tonight into Tuesday.
Next chance for precipitation comes Friday.

$$

ANZ250-020000-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
703 AM EDT Mon Sep 1 2025

.TODAY...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and N 1 foot at 3 seconds.
.TONIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 9 seconds and NE 1 foot at 3 seconds. Patchy fog after
midnight with vsby 1 NM or less.
.TUE...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds and NE 1 foot at 3 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.TUE NIGHT...SE winds 5 to 10 kt, becoming SW after midnight.
Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds.
.WED AND WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and S 2 ft at
4 seconds.
.THU AND THU NIGHT...S winds 10 to 15 kt, increasing to 15 to
20 kt. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at
4 seconds and E 3 ft at 8 seconds.
.FRI AND FRI NIGHT...S winds 15 to 20 kt with gusts up to 25 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.

$$

ANZ251-020000-
Massachusetts Bay and Ipswich Bay-
703 AM EDT Mon Sep 1 2025

.TODAY...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and N 1 foot at 3 seconds.
.TONIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE
1 foot at 3 seconds and E 1 foot at 7 seconds. Patchy fog after
midnight with vsby 1 NM or less.
.TUE...NE winds around 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and NE 1 foot at 3 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.TUE NIGHT...SE winds 5 to 10 kt, becoming SW after midnight.
Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and NE 1 foot at
3 seconds.
.WED...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: E 3 ft at
8 seconds and SW 1 foot at 2 seconds.
.WED NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and S
2 ft at 4 seconds.
.THU AND THU NIGHT...S winds 10 to 15 kt, increasing to 15 to
20 kt. Gusts up to 25 kt. Seas 2 to 3 ft.
.FRI AND FRI NIGHT...S winds 10 to 15 kt with gusts up to 25 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.

$$

ANZ231-020000-
Cape Cod Bay-
703 AM EDT Mon Sep 1 2025

.TODAY...NE winds 5 to 10 kt. Seas 1 foot or less, then around
2 ft this afternoon. Wave Detail: N 1 foot at 3 seconds and E
1 foot at 7 seconds, becoming NE 1 foot at 3 seconds and E 1 foot
at 8 seconds.
.TONIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE
1 foot at 3 seconds and E 1 foot at 8 seconds.
.TUE...NE winds around 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and N 1 foot at 3 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.TUE NIGHT...E winds 5 to 10 kt, becoming SW after midnight. Seas
around 2 ft. Wave Detail: E 2 ft at 8 seconds and SW 1 foot at
2 seconds.
.WED AND WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and W 1 foot
at 2 seconds.
.THU AND THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: E 2 ft at 8 seconds and S 1 foot at
3 seconds.
.FRI AND FRI NIGHT...S winds 10 to 15 kt with gusts up to 25 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.

$$

ANZ254-020000-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
703 AM EDT Mon Sep 1 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
WEDNESDAY MORNING...

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

$$

ANZ255-020000-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
703 AM EDT Mon Sep 1 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
WEDNESDAY MORNING...

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

$$

ANZ256-020000-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
703 AM EDT Mon Sep 1 2025

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

$$

ANZ232-020000-
Nantucket Sound-
703 AM EDT Mon Sep 1 2025

.TODAY...NE winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas around 2 ft. Wave Detail: NE 2 ft at 4 seconds and E 1 foot
at 7 seconds.
.TONIGHT...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: E
2 ft at 3 seconds and E 1 foot at 7 seconds.
.TUE...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 SE 2 ft at 8 seconds.
.TUE NIGHT...NE winds around 10 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and E 2 ft at
8 seconds.
.WED AND WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave
Detail: SW 2 ft at 3 seconds and E 2 ft at 8 seconds.
.THU AND THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 foot
at 8 seconds.
.FRI AND FRI NIGHT...S winds 15 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.

$$

ANZ233-020000-
Vineyard Sound-
703 AM EDT Mon Sep 1 2025

.TODAY...NE winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas around 2 ft. Wave Detail: NE 1 foot at 2 seconds and SE
1 foot at 7 seconds.
.TONIGHT...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
NE 1 foot at 3 seconds and SE 1 foot at 8 seconds.
.TUE...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and NE 1 foot at 3 seconds.
.TUE NIGHT...E winds 5 to 10 kt, becoming W after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot at
2 seconds.
.WED AND WED NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 8 seconds and W 1 foot at 2 seconds.
.THU AND THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and SE 1 foot
at 8 seconds.
.FRI AND FRI NIGHT...S 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.

$$

ANZ234-020000-
Buzzards Bay-
703 AM EDT Mon Sep 1 2025

.TODAY...NE winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas around 2 ft. Wave Detail: NE 1 foot at 2 seconds and SE
1 foot at 7 seconds.
.TONIGHT...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
NE 1 foot at 3 seconds and SE 1 foot at 8 seconds.
.TUE...NE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and NE 1 foot
at 2 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.TUE NIGHT...E winds 5 to 10 kt, becoming W after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot at
2 seconds.
.WED AND WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft
at 8 seconds.
.THU AND THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 1 foot
at 8 seconds.
.FRI AND FRI NIGHT...S winds 15 to 20 kt, becoming SW 10 to
15 kt. Gusts up to 25 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.

$$

ANZ235-020000-
Rhode Island Sound-
703 AM EDT Mon Sep 1 2025

.TODAY...NE winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and SE 2 ft at
7 seconds.
.TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and E
2 ft at 4 seconds.
.TUE...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and NE 2 ft at 3 seconds.
.TUE NIGHT...SE winds 5 to 10 kt, becoming W after midnight. Seas
2 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and W 1 foot at
2 seconds.
.WED AND WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and SW 2 ft at
3 seconds.
.THU AND THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SE 3 ft at 5 seconds and SE 2 ft at
8 seconds.
.FRI AND FRI NIGHT...S winds around 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.

$$

ANZ237-020000-
Block Island Sound-
703 AM EDT Mon Sep 1 2025

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

$$

ANZ230-020000-
Boston Harbor-
703 AM EDT Mon Sep 1 2025

.TODAY...NE winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft this afternoon.
.TONIGHT...NE winds 5 to 10 kt. Waves 1 foot or less. Patchy fog
after midnight with vsby 1 NM or less.
.TUE...NE winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon.
.TUE NIGHT...SE winds 5 to 10 kt, becoming SW after midnight.
Waves 1 foot or less.
.WED...SW winds 5 to 10 kt, becoming S in the afternoon. Waves
1 foot or less, then around 2 ft in the afternoon.
.WED NIGHT...S winds 10 to 15 kt, becoming SW 5 to 10 kt after
midnight. Waves around 2 ft in the evening, then 1 foot or less.
.THU AND THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.FRI AND FRI NIGHT...S winds 10 to 15 kt with gusts up to 25 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.

$$

ANZ236-020000-
Narragansett Bay-
703 AM EDT Mon Sep 1 2025

.TODAY...NE winds 5 to 10 kt, becoming E 10 to 15 kt this
afternoon. Waves around 2 ft.
.TONIGHT...NE winds 5 to 10 kt. Waves around 2 ft.
.TUE...NE winds 5 to 10 kt, becoming E in the afternoon. Waves
around 2 ft.
.TUE NIGHT...SE winds 5 to 10 kt, becoming W after midnight.
Waves around 2 ft.
.WED AND WED NIGHT...SW winds 10 to 15 kt. Waves around 2 ft.
.THU...S winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft.
.THU NIGHT THROUGH FRI NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Waves 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.

$$

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