342
FZUS51 KBOX 260803
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
403 AM EDT Sat Jul 26 2025

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

ANZ200-262100-
403 AM EDT Sat Jul 26 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pressure moves offshore Friday morning, a cold front will move
into New England during the afternoon, crossing the waters overnight
into Saturday morning. Low pressure system crosses the waters Monday.

$$

ANZ250-262100-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
403 AM EDT Sat Jul 26 2025

.TODAY...N winds 10 to 15 kt with gusts up to 20 kt, becoming E
5 to 10 kt this afternoon. Seas 2 to 3 ft. Wave Detail: N 3 ft at
8 seconds and NW 2 ft at 3 seconds.
.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE
2 ft at 6 seconds and S 1 foot at 2 seconds.
.SUN...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and E 1 foot at
7 seconds. A chance of showers in the afternoon.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at
8 seconds. A chance of showers in the evening.
.MON...W winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at
9 seconds.
.MON NIGHT...S winds around 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 3 seconds and E 1 foot at 9 seconds.
.TUE THROUGH WED...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft.
.WED NIGHT...SW winds around 10 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.

$$

ANZ251-262100-
Massachusetts Bay and Ipswich Bay-
403 AM EDT Sat Jul 26 2025

.TODAY...N winds 5 to 10 kt, becoming E this afternoon. Seas
around 2 ft. Wave Detail: N 2 ft at 4 seconds.
.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE
2 ft at 5 seconds and S 1 foot at 2 seconds.
.SUN...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: S 1 foot at 2 seconds and E
1 foot at 6 seconds, becoming S 2 ft at 3 seconds and E 1 foot at
8 seconds. A chance of showers.
.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
2 ft at 3 seconds and E 1 foot at 8 seconds. A chance of showers
in the evening.
.MON...NW winds 5 to 10 kt, becoming E in the afternoon. Seas
around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at
8 seconds.
.MON NIGHT...S winds around 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 3 seconds and E 1 foot at 9 seconds.
.TUE THROUGH WED...NE winds 5 to 10 kt. Seas around 2 ft.
.WED NIGHT...SW winds around 10 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.

$$

ANZ231-262100-
Cape Cod Bay-
403 AM EDT Sat Jul 26 2025

.TODAY...NE winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt this afternoon. Seas around 2 ft. Wave Detail: N
1 foot at 4 seconds.
.TONIGHT...S winds around 5 kt. Seas 1 foot or less. Wave Detail:
E 1 foot at 4 seconds.
.SUN...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: S 1 foot at 2 seconds and NE
1 foot at 5 seconds. A chance of showers in the afternoon.
.SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft in the
evening, then 1 foot or less. Wave Detail: S 1 foot at 2 seconds
and E 1 foot at 6 seconds, becoming SW 1 foot at 2 seconds and E
1 foot at 7 seconds. A chance of showers.
.MON...W winds 5 to 10 kt, becoming E in the afternoon. Seas
1 foot or less. Wave Detail: W 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: SE 1 foot at 2 seconds and E 1 foot at 7 seconds.
.TUE THROUGH WED...N winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft.
.WED NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. 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.

$$

ANZ254-262100-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
403 AM EDT Sat Jul 26 2025

.TODAY...NE winds 10 to 15 kt. Gusts up to 20 kt this morning.
Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and S 3 ft at
6 seconds.
.TONIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and NE 2 ft at
6 seconds.
.SUN...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft
at 6 seconds and S 1 foot at 5 seconds. A chance of showers in
the afternoon.
.SUN NIGHT...S winds around 10 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 3 seconds and SE 1 foot at 7 seconds. A chance of
showers.
.MON...SW winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: SW 2 ft at 3 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 3 seconds and E 1 foot at 9 seconds.
.TUE THROUGH WED NIGHT...SW 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.

$$

ANZ255-262100-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
403 AM EDT Sat Jul 26 2025

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

$$

ANZ256-262100-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
403 AM EDT Sat Jul 26 2025

.TODAY...NE winds 10 to 15 kt. Gusts up to 20 kt this morning.
Seas 2 to 3 ft. Wave Detail: NE 3 ft at 5 seconds and SW 2 ft at
6 seconds.
.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 5 seconds and S 1 foot at 5 seconds.
.SUN...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 3 seconds and SE 2 ft at 8 seconds. A chance of showers in the
afternoon.
.SUN NIGHT...S winds 10 to 15 kt, becoming SW after midnight.
Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and SE 2 ft at
8 seconds. A chance of showers.
.MON AND MON NIGHT...SW winds around 10 kt. Seas around 2 ft.
Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 8 seconds.
.TUE THROUGH WED...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave
Detail: SW 2 ft at 3 seconds and SE 1 foot at 9 seconds.
.WED NIGHT...SW winds around 10 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.

$$

ANZ232-262100-
Nantucket Sound-
403 AM EDT Sat Jul 26 2025

.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 SW 1 foot at
5 seconds.
.TONIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
around 2 ft in the evening, then 1 foot or less. Wave Detail: SE
1 foot at 6 seconds, becoming S 1 foot at 4 seconds and E 1 foot
at 6 seconds.
.SUN...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: S 1 foot at 3 seconds and E 1 foot
at 6 seconds. A chance of showers in the afternoon.
.SUN NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 3 seconds and E 1 foot at 7 seconds. A chance of
showers.
.MON...W winds around 10 kt, becoming S in the afternoon. Seas
1 foot or less. Wave Detail: W 1 foot at 3 seconds and SE 1 foot
at 8 seconds.
.MON NIGHT...S winds around 10 kt. Seas 1 foot or less, then
around 2 ft after midnight. Wave Detail: S 1 foot at 3 seconds
and SE 1 foot at 8 seconds, becoming SW 1 foot at 3 seconds and
SE 1 foot at 8 seconds.
.TUE THROUGH WED NIGHT...SW 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.

$$

ANZ233-262100-
Vineyard Sound-
403 AM EDT Sat Jul 26 2025

.TODAY...NE winds 10 to 15 kt. Gusts up to 20 kt this morning.
Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and NE 1 foot
at 3 seconds.
.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft in the evening,
then 1 foot or less. Wave Detail: SE 1 foot at 5 seconds,
becoming S 1 foot at 4 seconds and SE 1 foot at 7 seconds.
.SUN...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: S 1 foot at 3 seconds and SE
1 foot at 7 seconds. A chance of showers in the afternoon.
.SUN NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: S 1 foot at 3 seconds and SE 1 foot at 7 seconds. A
chance of showers.
.MON AND MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: W 1 foot at 4 seconds and SE 1 foot at 8 seconds.
.TUE THROUGH WED...W 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 1 foot
at 8 seconds.
.WED NIGHT...SW winds around 10 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.

$$

ANZ234-262100-
Buzzards Bay-
403 AM EDT Sat Jul 26 2025

.TODAY...NE winds 10 to 15 kt with gusts up to 20 kt, becoming E
this afternoon. Seas around 2 ft. Wave Detail: NE 1 foot at
3 seconds and SW 1 foot at 5 seconds.
.TONIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
E 1 foot at 5 seconds.
.SUN...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: S 1 foot at 3 seconds and SE
1 foot at 7 seconds. A chance of showers in the afternoon.
.SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
S 1 foot at 3 seconds and SE 1 foot at 8 seconds. A chance of
showers.
.MON AND MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: W 1 foot at 4 seconds and SE 1 foot at 8 seconds.
.TUE THROUGH WED...NW 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 1 foot
at 8 seconds.
.WED NIGHT...SW winds around 10 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.

$$

ANZ235-262100-
Rhode Island Sound-
403 AM EDT Sat Jul 26 2025

.TODAY...NE winds 10 to 15 kt with gusts up to 20 kt, becoming E
this afternoon. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds
and S 2 ft at 6 seconds.
.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 6 seconds.
.SUN...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 3 seconds and SE 1 foot at 8 seconds. A chance of showers.
.SUN NIGHT...S winds around 10 kt, becoming SW after midnight.
Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and SE 1 foot
at 8 seconds. A chance of showers.
.MON AND MON NIGHT...SW winds around 10 kt. Seas around 2 ft.
Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds.
.TUE THROUGH WED...W winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot
at 9 seconds.
.WED NIGHT...SW winds around 10 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.

$$

ANZ237-262100-
Block Island Sound-
403 AM EDT Sat Jul 26 2025

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

$$

ANZ230-262100-
Boston Harbor-
403 AM EDT Sat Jul 26 2025

.TODAY...NE winds 5 to 10 kt, becoming E this afternoon. Waves
1 foot or less.
.TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Waves
1 foot or less.
.SUN...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Waves 1 foot or less, then around 2 ft in the
afternoon. A chance of showers.
.SUN NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Waves around 2 ft in the evening, then 1 foot or
less. A chance of showers in the evening.
.MON...NW winds around 5 kt, becoming E in the afternoon. Waves
1 foot or less.
.MON NIGHT...S winds around 10 kt, becoming SW after midnight.
Waves 1 foot or less.
.TUE THROUGH WED...NE winds 5 to 10 kt. Waves around 2 ft.
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 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.

$$

ANZ236-262100-
Narragansett Bay-
403 AM EDT Sat Jul 26 2025

.TODAY...NE winds 10 to 15 kt, becoming E 5 to 10 kt this
afternoon. Waves around 2 ft.
.TONIGHT...S winds 5 to 10 kt. Waves 1 foot or less.
.SUN...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon. A chance of showers.
.SUN NIGHT...S winds around 10 kt, becoming SW after midnight.
Waves 1 foot or less. A chance of showers in the evening.
.MON...N winds 5 to 10 kt, becoming S in the afternoon. Waves
1 foot or less.
.MON NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.TUE THROUGH WED...W winds 10 to 15 kt. Waves around 2 ft.
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. 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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