943
FZUS51 KBOX 021703
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
103 PM EDT Sat Aug 2 2025

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

ANZ200-030600-
103 PM EDT Sat Aug 2 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
A sprawling high pres builds across New England this weekend and
lingers through most of next week. Rather tranquil marine
conditions with good visibility expected.

$$

ANZ250-030600-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
103 PM EDT Sat Aug 2 2025

.THIS AFTERNOON...NE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 7 seconds and N 1 foot at 3 seconds.
.TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
2 to 3 ft. Wave Detail: E 2 ft at 7 seconds and N 1 foot at
3 seconds.
.SUN...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
3 seconds and E 2 ft at 8 seconds.
.SUN NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and E 2 ft at
7 seconds.
.MON AND MON NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at
7 seconds.
.TUE THROUGH WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
Wave Detail: E 3 ft at 7 seconds and S 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.

$$

ANZ251-030600-
Massachusetts Bay and Ipswich Bay-
103 PM EDT Sat Aug 2 2025

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

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.

$$

ANZ231-030600-
Cape Cod Bay-
103 PM EDT Sat Aug 2 2025

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

$$

ANZ254-030600-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
103 PM EDT Sat Aug 2 2025

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

$$

ANZ255-030600-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
103 PM EDT Sat Aug 2 2025

.THIS AFTERNOON...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: NE 3 ft at 7 seconds and NW 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 N 1 foot at 3 seconds.
.SUN...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 7 seconds.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 7 seconds and S 1 foot at 3 seconds.
.MON AND MON NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 7 seconds.
.TUE THROUGH WED NIGHT...E 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 E
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.

$$

ANZ256-030600-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
103 PM EDT Sat Aug 2 2025

.THIS AFTERNOON...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 7 seconds and N 1 foot at 3 seconds.
.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds.
.SUN...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 8 seconds.
.MON...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds.
.MON NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas
around 3 ft. Wave Detail: SE 3 ft at 7 seconds.
.TUE THROUGH WED NIGHT...E winds 10 to 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.

$$

ANZ232-030600-
Nantucket Sound-
103 PM EDT Sat Aug 2 2025

.THIS AFTERNOON...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: NE 2 ft at 6 seconds and N 1 foot at 3 seconds.
.TONIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas
around 2 ft. Wave Detail: E 2 ft at 7 seconds and E 1 foot at
2 seconds.
.SUN...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 2 seconds and E 1 foot at 7 seconds.
.SUN NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
1 foot at 3 seconds and E 1 foot at 7 seconds.
.MON AND 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 3 seconds.
.TUE THROUGH WED NIGHT...E winds 10 to 15 kt. Seas around 2 ft.
Wave Detail: E 2 ft at 7 seconds and E 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.

$$

ANZ233-030600-
Vineyard Sound-
103 PM EDT Sat Aug 2 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 1 foot at 5 seconds.
.TONIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
S 1 foot at 2 seconds and SE 1 foot at 6 seconds.
.SUN...SW winds around 5 kt, becoming S in the afternoon. 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 7 seconds, becoming S
1 foot at 3 seconds and SE 1 foot at 8 seconds.
.SUN NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
1 foot at 3 seconds and SE 1 foot at 8 seconds.
.MON AND MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: S 1 foot at 3 seconds and SE 1 foot at 7 seconds.
.TUE THROUGH WED NIGHT...E winds 10 to 15 kt. Seas around 2 ft.
Wave Detail: E 2 ft at 7 seconds and E 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.

$$

ANZ234-030600-
Buzzards Bay-
103 PM EDT Sat Aug 2 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: E 1 foot at 4 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 SE 1 foot
at 7 seconds.
.SUN...SW winds around 5 kt, becoming S 10 to 15 kt in the
afternoon. 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
7 seconds, becoming S 1 foot at 3 seconds and SE 1 foot at
8 seconds.
.SUN NIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas around 2 ft in the evening, then 1 foot or less.
Wave Detail: S 1 foot at 3 seconds and SE 1 foot at 8 seconds,
becoming S 1 foot at 3 seconds and SE 1 foot at 7 seconds.
.MON...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: SW 1 foot at 3 seconds and SE
1 foot at 7 seconds, becoming S 1 foot at 2 seconds and SE 1 foot
at 7 seconds.
.MON NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
1 foot or less. Wave Detail: S 1 foot at 2 seconds and SE 1 foot
at 7 seconds.
.TUE THROUGH WED NIGHT...E winds 10 to 15 kt with gusts up to
20 kt. 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.

$$

ANZ235-030600-
Rhode Island Sound-
103 PM EDT Sat Aug 2 2025

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

$$

ANZ237-030600-
Block Island Sound-
103 PM EDT Sat Aug 2 2025

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

$$

ANZ230-030600-
Boston Harbor-
103 PM EDT Sat Aug 2 2025

.THIS AFTERNOON...E 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.
.SUN...SW winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less, then around 2 ft in the afternoon.
.SUN 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.
.MON...SW winds 5 to 10 kt, becoming SE in the afternoon. Waves
1 foot or less.
.MON NIGHT...S winds 5 to 10 kt. Waves 1 foot or less.
.TUE THROUGH WED NIGHT...SE 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.

$$

ANZ236-030600-
Narragansett Bay-
103 PM EDT Sat Aug 2 2025

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

$$

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