821
FZUS51 KBOX 251103
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
703 AM EDT Fri Jul 25 2025

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

ANZ200-260000-
703 AM EDT Fri Jul 25 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.

$$

ANZ250-260000-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at
8 seconds. Scattered showers and tstms this afternoon. Some tstms
may be severe with gusty winds, small hail, frequent lightning,
and heavy rainfall. Vsby 1 to 3 NM this afternoon.
.TONIGHT...W winds around 10 kt, becoming N after midnight. Gusts
up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and
SE 1 foot at 9 seconds. Scattered showers and tstms in the
evening. Some tstms may be severe with gusty winds, small hail,
frequent lightning, and heavy rainfall. Vsby 1 to 3 NM in the
evening.
.SAT...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE
5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NE 3 ft
at 8 seconds and N 2 ft at 4 seconds.
.SAT NIGHT...SE winds 5 to 10 kt, becoming SW after midnight.
Seas around 2 ft. Wave Detail: NE 2 ft at 6 seconds and S 1 foot
at 2 seconds.
.SUN AND 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 3 seconds and E 1 foot at
7 seconds.
.MON THROUGH TUE NIGHT...W 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 SE
1 foot at 9 seconds.

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.

$$

ANZ251-260000-
Massachusetts Bay and Ipswich Bay-
703 AM EDT Fri Jul 25 2025

.TODAY...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 1 foot at
8 seconds. Scattered showers and tstms this afternoon. Some tstms
may be severe with gusty winds, small hail, frequent lightning,
and heavy rainfall. Vsby 1 to 3 NM this afternoon.
.TONIGHT...W winds 5 to 10 kt, becoming N with gusts up to 20 kt
after midnight. Seas around 2 ft. Wave Detail: W 2 ft at
3 seconds and SE 1 foot at 9 seconds. Scattered showers and tstms
in the evening. Some tstms may be severe with gusty winds, small
hail, frequent lightning, and heavy rainfall. Vsby 1 to 3 NM in
the evening.
.SAT...N winds around 10 kt with gusts up to 20 kt, becoming E in
the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at
4 seconds.
.SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
NE 2 ft at 5 seconds.
.SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E 1 foot
at 6 seconds.
.MON THROUGH TUE NIGHT...W winds 10 to 15 kt with gusts up to
20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E
1 foot at 8 seconds.

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.

$$

ANZ231-260000-
Cape Cod Bay-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at
8 seconds. Scattered showers and tstms this afternoon. Some tstms
may be severe with gusty winds, small hail, frequent lightning,
and heavy rainfall. Vsby 1 to 3 NM this afternoon.
.TONIGHT...W winds around 10 kt, becoming N after midnight. Gusts
up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and
SE 1 foot at 9 seconds. Scattered showers and tstms in the
evening. Some tstms may be severe with gusty winds, small hail,
frequent lightning, and heavy rainfall. Vsby 1 to 3 NM in the
evening.
.SAT...NE winds around 10 kt. Gusts up to 20 kt in the morning.
Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds.
.SAT NIGHT...SE winds around 5 kt, becoming S after midnight.
Seas around 2 ft in the evening, then 1 foot or less. Wave
Detail: N 2 ft at 5 seconds, becoming NE 1 foot at 5 seconds.
.SUN AND SUN NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: S 1 foot at 2 seconds and NE 1 foot at 5 seconds.
.MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft. Wave Detail: S 1 foot at 2 seconds and E
1 foot at 7 seconds.

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.

$$

ANZ254-260000-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds around 15 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at
8 seconds. Scattered showers and tstms this afternoon. Some tstms
may be severe with gusty winds, small hail, frequent lightning,
and heavy rainfall. Vsby 1 to 3 NM this afternoon.
.TONIGHT...W winds 10 to 15 kt, becoming N after midnight. Gusts
up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds
and SE 1 foot at 9 seconds. Patchy fog in the evening. Scattered
showers and tstms in the evening. Some tstms may be severe with
gusty winds, small hail, frequent lightning, and heavy rainfall.
Vsby 1 to 3 NM in the evening.
.SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: S 3 ft at 6 seconds and NE 3 ft at 8 seconds.
.SAT NIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas
2 to 3 ft. Wave Detail: NW 2 ft at 5 seconds and NE 2 ft at
6 seconds.
.SUN AND SUN NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: NE 2 ft at 6 seconds and SW 1 foot at 5 seconds.
.MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 3 seconds and SE
1 foot at 8 seconds.

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.

$$

ANZ255-260000-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at
8 seconds. Isolated tstms this afternoon. Some tstms may be
severe with gusty winds, small hail, frequent lightning, and
heavy rainfall.
.TONIGHT...SW winds 10 to 15 kt, becoming N after midnight. Gusts
up to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 6 seconds
and SE 1 foot at 9 seconds. Patchy fog in the evening. Scattered
showers and tstms in the evening. Some tstms may be severe with
gusty winds, small hail, frequent lightning, and heavy rainfall.
Vsby 1 to 3 NM in the evening.
.SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 5 seconds and NE 3 ft at 6 seconds.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE
2 ft at 6 seconds and S 1 foot at 5 seconds.
.SUN AND SUN NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 2 ft at 6 seconds.
.MON THROUGH TUE NIGHT...SW 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
2 ft at 8 seconds.

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.

$$

ANZ256-260000-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at
8 seconds. Isolated showers and tstms this afternoon. Some tstms
may be severe with gusty winds, small hail, frequent lightning,
and heavy rainfall.
.TONIGHT...W winds 10 to 15 kt, becoming N after midnight. Gusts
up to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds
and SE 1 foot at 9 seconds. Scattered showers and tstms in the
evening. Some tstms may be severe with gusty winds, small hail,
frequent lightning, and heavy rainfall. Vsby 1 to 3 NM in the
evening.
.SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: SW 3 ft at 5 seconds and NE 3 ft at 5 seconds.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 5 seconds and S 1 foot at 5 seconds.
.SUN AND SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: S 2 ft at 3 seconds and SE 2 ft at 8 seconds.
.MON THROUGH TUE 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
2 ft at 8 seconds.

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.

$$

ANZ232-260000-
Nantucket Sound-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds 15 to 20 kt with gusts up to 25 kt. Seas around
3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at
8 seconds. Scattered showers and tstms this afternoon. Some tstms
may be severe with gusty winds, small hail, frequent lightning,
and heavy rainfall.
.TONIGHT...W winds 10 to 15 kt, becoming N after midnight. Gusts
up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds
and SE 1 foot at 9 seconds. Patchy fog in the evening. Scattered
showers and tstms in the evening. Some tstms may be severe with
gusty winds, small hail, frequent lightning, and heavy rainfall.
Vsby 1 to 3 NM in the evening.
.SAT...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.
.SAT NIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas
around 2 ft. Wave Detail: E 2 ft at 5 seconds.
.SUN AND 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 6 seconds.
.MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and SE
1 foot at 8 seconds.

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.

$$

ANZ233-260000-
Vineyard Sound-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at
8 seconds. Scattered showers and tstms this afternoon. Some tstms
may be severe with gusty winds, small hail, frequent lightning,
and heavy rainfall.
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N
after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds
and SE 1 foot at 9 seconds. Scattered showers and tstms in the
evening. Some tstms may be severe with gusty winds, small hail,
frequent lightning, and heavy rainfall.
.SAT...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
5 seconds.
.SAT NIGHT...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 5 seconds.
.SUN AND SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: S 1 foot at 4 seconds and SE 1 foot at 7 seconds.
.MON THROUGH TUE NIGHT...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 8 seconds.

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.

$$

ANZ234-260000-
Buzzards Bay-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds around 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at
8 seconds. Scattered showers and tstms this afternoon. Some tstms
may be severe with gusty winds, small hail, frequent lightning,
and heavy rainfall.
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N
after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds
and SE 1 foot at 9 seconds. Scattered showers and tstms in the
evening. Some tstms may be severe with gusty winds, small hail,
frequent lightning, and heavy rainfall.
.SAT...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and SW 1 foot
at 5 seconds.
.SAT NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
1 foot or less. Wave Detail: E 1 foot at 5 seconds.
.SUN AND 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 7 seconds.
.MON THROUGH TUE NIGHT...W 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 SE
1 foot at 8 seconds.

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.

$$

ANZ235-260000-
Rhode Island Sound-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at
8 seconds. Scattered showers and tstms this afternoon. Some tstms
may be severe with gusty winds, small hail, frequent lightning,
and heavy rainfall.
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N
after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 6 seconds
and SE 1 foot at 9 seconds. Scattered showers and tstms in the
evening. Some tstms may be severe with gusty winds, small hail,
frequent lightning, and heavy rainfall.
.SAT...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and S 2 ft at
6 seconds.
.SAT NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 6 seconds.
.SUN AND SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 3 seconds and SE 1 foot at 8 seconds.
.MON THROUGH TUE NIGHT...W winds 10 to 15 kt with gusts up to
20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and SE
1 foot at 8 seconds.

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.

$$

ANZ237-260000-
Block Island Sound-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at
8 seconds. Scattered showers and tstms this afternoon. Some tstms
may be severe with gusty winds, small hail, frequent lightning,
and heavy rainfall.
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N
after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds
and SE 1 foot at 9 seconds. Scattered showers and tstms in the
evening. Some tstms may be severe with gusty winds, small hail,
frequent lightning, and heavy rainfall.
.SAT...NE winds 10 to 15 kt with gusts up to 20 kt, becoming E in
the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds
and NE 2 ft at 5 seconds.
.SAT NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 5 seconds.
.SUN AND SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 8 seconds and SE 1 foot at 5 seconds.
.MON THROUGH TUE NIGHT...W winds 10 to 15 kt with gusts up to
20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and SE
1 foot at 8 seconds.

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.

$$

ANZ230-260000-
Boston Harbor-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds around 10 kt. Gusts up to 20 kt this afternoon.
Waves around 2 ft. Scattered showers and tstms this afternoon.
Some tstms may be severe with gusty winds, small hail, frequent
lightning, and heavy rainfall. Vsby 1 to 3 NM this afternoon.
.TONIGHT...NW winds 5 to 10 kt, becoming N after midnight. Waves
around 2 ft in the evening, then 1 foot or less. Scattered
showers and tstms in the evening. Some tstms may be severe with
gusty winds, small hail, frequent lightning, and heavy rainfall.
.SAT...NE winds around 10 kt, becoming E in the afternoon. Waves
around 2 ft in the morning, then 1 foot or less.
.SAT NIGHT...SE winds 5 to 10 kt, becoming SW after midnight.
Waves 1 foot or less.
.SUN AND SUN NIGHT...SW winds 10 to 15 kt. Waves around 2 ft.
.MON AND MON NIGHT...S winds 5 to 10 kt, increasing to 10 to
15 kt. Waves around 2 ft.
.TUE AND TUE NIGHT...SW winds around 10 kt, becoming W. 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.

$$

ANZ236-260000-
Narragansett Bay-
703 AM EDT Fri Jul 25 2025

.TODAY...SW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to
3 ft. Scattered showers and tstms this afternoon. Some tstms may
be severe with gusty winds, small hail, frequent lightning, and
heavy rainfall. Vsby 1 to 3 NM this afternoon.
.TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt, becoming N
after midnight. Waves around 2 ft. Scattered showers and tstms in
the evening. Some tstms may be severe with gusty winds, small
hail, frequent lightning, and heavy rainfall.
.SAT...NE winds around 10 kt, becoming E in the afternoon. Waves
around 2 ft.
.SAT NIGHT...S winds 5 to 10 kt. Waves around 2 ft in the
evening, then 1 foot or less.
.SUN AND SUN NIGHT...SW winds 5 to 10 kt. Waves around 2 ft.
.MON THROUGH TUE NIGHT...W winds 10 to 15 kt with gusts up to
20 kt. Waves around 2 ft.

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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