657
FZUS51 KBOX 031705
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
105 PM EDT Sun Aug 3 2025

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

ANZ200-040600-
105 PM EDT Sun Aug 3 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Rather tranquil marine conditions thanks to a vast area of high
pressure into the upcoming week, but will need to monitor an area of
low pressure off the Carolina coast. This feature may send swells
towards southern New England from Wednesday through early Friday.

$$

ANZ250-040600-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 2 ft at 2 seconds and E 2 ft at
7 seconds.
.TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: S 2 ft at 3 seconds and E 2 ft at 7 seconds.
.MON...SW winds 5 to 10 kt, becoming S in the afternoon. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at
7 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 7 seconds and S 1 foot at 3 seconds.
.TUE AND TUE NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 8 seconds and NE 2 ft at 4 seconds.
.WED THROUGH THU NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave
Detail: E 4 ft at 9 seconds and NE 1 foot at 4 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.

$$

ANZ251-040600-
Massachusetts Bay and Ipswich Bay-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...SE winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and E 2 ft at
7 seconds.
.TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and E 2 ft at
7 seconds.
.MON...SW winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 7 seconds and S 1 foot at
3 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 3 seconds and E 2 ft at 7 seconds.
.TUE AND TUE NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: NE 2 ft at 3 seconds and E 2 ft at 7 seconds.
.WED THROUGH THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 9 seconds and NE 1 foot at 4 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.

$$

ANZ231-040600-
Cape Cod Bay-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 1 foot at 3 seconds and E 1 foot at 7 seconds.
.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
1 foot at 3 seconds and E 1 foot at 7 seconds.
.MON...S winds 5 to 10 kt. Seas around 2 ft in the morning, then
1 foot or less. Wave Detail: SW 1 foot at 2 seconds and E 1 foot
at 7 seconds, becoming S 1 foot at 2 seconds and E 1 foot at
7 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 2 seconds and E 1 foot at 7 seconds.
.TUE AND TUE NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 7 seconds and NE 1 foot at 3 seconds.
.WED THROUGH THU NIGHT...SE winds 5 to 10 kt. Seas around 2 ft.
Wave Detail: E 2 ft at 8 seconds and NE 1 foot at 3 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.

$$

ANZ254-040600-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: E 2 ft at 7 seconds and N 1 foot at 3 seconds.
.TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 7 seconds and S 1 foot at 2 seconds.
.MON...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 7 seconds and SE 1 foot at 8 seconds.
.MON NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas
2 to 3 ft. Wave Detail: E 3 ft at 7 seconds.
.TUE AND TUE NIGHT...NE winds 5 to 10 kt. Seas 2 to 4 ft. Wave
Detail: E 4 ft at 8 seconds and S 1 foot at 9 seconds.
.WED THROUGH THU NIGHT...E winds 10 to 15 kt with gusts up to
20 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 8 seconds and NE
1 foot at 4 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.

$$

ANZ255-040600-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 7 seconds and SE 1 foot at 8 seconds.
.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 7 seconds and SE 1 foot at 8 seconds.
.MON...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
8 seconds.
.MON NIGHT...SE winds 5 to 10 kt, becoming NE after midnight.
Seas 2 to 3 ft. Wave Detail: E 3 ft at 7 seconds and S 2 ft at
10 seconds.
.TUE AND TUE NIGHT...NE winds 10 to 15 kt. Seas 2 to 4 ft. Wave
Detail: E 4 ft at 8 seconds and S 2 ft at 9 seconds.
.WED THROUGH THU NIGHT...E winds 10 to 15 kt with gusts up to
20 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 8 seconds and NE
1 foot at 3 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.

$$

ANZ256-040600-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 8 seconds and SE 1 foot at 8 seconds.
.TONIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas
around 2 ft. Wave Detail: E 2 ft at 8 seconds and SE 1 foot at
8 seconds.
.MON...NE winds around 5 kt, becoming SE in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds.
.MON NIGHT...S winds 5 to 10 kt, becoming E after midnight. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at
10 seconds.
.TUE AND TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: E 4 ft at 8 seconds and S 2 ft at 9 seconds.
.WED THROUGH THU NIGHT...E winds 10 to 15 kt with gusts up to
20 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft 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.

$$

ANZ232-040600-
Nantucket Sound-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 1 foot at 3 seconds and E 1 foot at 7 seconds.
.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
1 foot at 2 seconds and E 1 foot at 7 seconds.
.MON...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 2 seconds and SE 1 foot at 7 seconds.
.MON NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 7 seconds and S 1 foot at 2 seconds.
.TUE AND TUE NIGHT...NE winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 7 seconds and E 1 foot at 2 seconds.
.WED THROUGH THU NIGHT...E winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and NE
2 ft at 3 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.

$$

ANZ233-040600-
Vineyard Sound-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...S winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SE 1 foot at 2 seconds and E 1 foot at 7 seconds.
.TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
1 foot or less. Wave Detail: S 1 foot at 2 seconds and E 1 foot
at 7 seconds.
.MON...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: SE 1 foot at 7 seconds and E
1 foot at 8 seconds, becoming S 1 foot at 2 seconds and SE 1 foot
at 8 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
1 foot at 2 seconds and E 1 foot at 7 seconds.
.TUE AND TUE NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 7 seconds and E 1 foot at 2 seconds.
.WED THROUGH THU NIGHT...E winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and NE
1 foot at 3 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.

$$

ANZ234-040600-
Buzzards Bay-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...S winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SE 1 foot at 2 seconds and E 1 foot at 8 seconds.
.TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
1 foot or less. Wave Detail: S 1 foot at 2 seconds and E 1 foot
at 7 seconds.
.MON...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SE
1 foot at 7 seconds and E 1 foot at 8 seconds.
.MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 2 seconds and E 1 foot at 7 seconds.
.TUE AND TUE NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 7 seconds and E 1 foot at 2 seconds.
.WED THROUGH THU NIGHT...E winds 10 to 15 kt with gusts up to
20 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and NE
1 foot at 2 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.

$$

ANZ235-040600-
Rhode Island Sound-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 1 foot at 2 seconds and SE 1 foot at 8 seconds.
.TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at
3 seconds.
.MON...W winds around 5 kt, becoming S in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at
2 seconds.
.MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 9 seconds and S 1 foot at 2 seconds.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds and SE 2 ft at 9 seconds.
.TUE NIGHT...NE winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
SE 3 ft at 8 seconds and E 1 foot at 3 seconds.
.WED THROUGH THU NIGHT...E winds 10 to 15 kt with gusts up to
20 kt. Seas 2 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.

$$

ANZ237-040600-
Block Island Sound-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 1 foot at 2 seconds and SE 1 foot at 8 seconds.
.TONIGHT...S winds around 5 kt, becoming SW after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at
2 seconds.
.MON...W winds around 5 kt, becoming S in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at
2 seconds.
.MON NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at
9 seconds.
.TUE...NE winds 5 to 10 kt, becoming E in the afternoon. Seas
2 to 3 ft. Wave Detail: E 3 ft at 7 seconds and S 2 ft at
10 seconds.
.TUE NIGHT...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds and NE 1 foot at 3 seconds.
.WED THROUGH THU NIGHT...E winds 10 to 15 kt with gusts up to
20 kt. Seas 2 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.

$$

ANZ230-040600-
Boston Harbor-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Waves around 2 ft.
.TONIGHT...SW winds 5 to 10 kt. Waves around 2 ft in the evening,
then 1 foot or less.
.MON...SW winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less.
.MON NIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves
1 foot or less.
.TUE AND TUE NIGHT...NE winds 5 to 10 kt. Waves around 2 ft.
.WED THROUGH THU NIGHT...S winds 5 to 10 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.

$$

ANZ236-040600-
Narragansett Bay-
105 PM EDT Sun Aug 3 2025

.THIS AFTERNOON...S winds 5 to 10 kt. Waves 1 foot or less.
.TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Waves
1 foot or less.
.MON...SW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon.
.MON NIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves
around 2 ft.
.TUE...NE winds 5 to 10 kt, becoming E in the afternoon. Waves
around 2 ft.
.TUE NIGHT...NE winds 5 to 10 kt. Waves around 2 ft.
.WED THROUGH THU NIGHT...E winds 5 to 10 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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