Coastal Waters Forecast
Issued by NWS Boston, MA

Current Version |  Previous Version |  Graphics & Text |  Print | Product List |  Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
428
FZUS51 KBOX 270206
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EDT Fri Apr 26 2024

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

ANZ200-271500-
1006 PM EDT Fri Apr 26 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pressure builds into New England through Saturday. The high
eventually shifts offshore later this weekend. This will allow a
warm front to lift in and bring showers late Saturday night into
early Sunday. The trailing cold front may slide through on Monday as
low pressure drops from the north, followed by another low late
Tuesday.

$$

ANZ250-271500-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 8 seconds and NE 1 ft at 3 seconds.
.SAT...SW winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: NE 1 ft at 2 seconds and SW 1 ft at
3 seconds.
.SAT NIGHT...S winds around 10 kt, becoming SW after midnight.
Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and E 2 ft at
9 seconds.
.SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 3 seconds and E 2 ft at 10 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W after midnight.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at
10 seconds.
.MON AND MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: NW 2 ft at 3 seconds and E 2 ft at 9 seconds.
.TUE AND TUE NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. A chance of rain.
.WED AND WED NIGHT...E winds around 10 kt, becoming SE. 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.

$$

ANZ251-271500-
Massachusetts Bay and Ipswich Bay-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 3 seconds and NE 1 ft at 3 seconds.
.SAT...SW winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: SW 1 ft at 3 seconds and E 1 ft at
3 seconds.
.SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
around 2 ft. Wave Detail: E 2 ft at 9 seconds and W 1 ft at
2 seconds.
.SUN...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and
E 2 ft at 9 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W after midnight.
Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at
10 seconds.
.MON...N winds around 10 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: N 2 ft at 3 seconds and E 2 ft at
9 seconds.
.MON NIGHT...SE winds 5 to 10 kt. Seas around 2 ft.
.TUE AND TUE NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. A chance of rain.
.WED AND WED NIGHT...E winds around 10 kt, becoming SE. 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.

$$

ANZ231-271500-
Cape Cod Bay-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: S 1 ft at 2 seconds and N 1 ft at 3 seconds.
.SAT...SW winds 5 to 10 kt, becoming SE in the afternoon. Seas
1 foot or less. Wave Detail: W 1 ft at 2 seconds and N 1 ft at
3 seconds.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SW 1 ft at 3 seconds and E 1 ft at 3 seconds.
.SUN...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: E 1 ft at 2 seconds and SW 1 ft at
3 seconds.
.SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 10 seconds and SE 1 ft at 2 seconds.
.MON AND MON NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: NW 1 ft at 3 seconds and SE 1 ft at 4 seconds.
.TUE AND TUE NIGHT...SE winds around 10 kt. Seas around 2 ft. A
chance of rain.
.WED AND WED NIGHT...E winds around 10 kt, becoming SE. 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.

$$

ANZ254-271500-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...S winds around 5 kt, becoming W. Seas around 2 ft.
Wave Detail: E 2 ft at 8 seconds and N 1 ft at 3 seconds.
.SAT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 ft
at 3 seconds and S 1 ft at 5 seconds.
.SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
N 1 ft at 3 seconds and SW 1 ft at 4 seconds.
.SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 10 seconds and SW 2 ft at 3 seconds.
.SUN NIGHT...SW winds 5 to 10 kt. Seas around 3 ft. Wave Detail:
E 3 ft at 10 seconds and SW 2 ft at 3 seconds.
.MON AND MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 10 seconds and NW 1 ft at 3 seconds.
.TUE...E winds around 10 kt. Seas 2 to 3 ft.
.TUE NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. A chance of rain.
.WED AND WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt,
becoming SE. 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.

$$

ANZ255-271500-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...SE winds around 5 kt, becoming W. Seas around 2 ft.
Wave Detail: E 2 ft at 8 seconds and W 1 ft at 3 seconds.
.SAT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 7 seconds and W 1 ft at 2 seconds.
.SAT NIGHT...W winds around 10 kt. Seas around 2 ft. Wave Detail:
W 2 ft at 4 seconds and E 2 ft at 8 seconds.
.SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft
at 5 seconds and E 2 ft at 9 seconds.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SW 3 ft at 4 seconds and E 3 ft at 10 seconds.
.MON AND MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 10 seconds and N 2 ft at 3 seconds.
.TUE THROUGH WED NIGHT...SE winds 10 to 15 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.

$$

ANZ256-271500-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...S winds around 5 kt, becoming SW. Seas around 2 ft.
Wave Detail: SE 2 ft at 8 seconds and SW 1 ft at 2 seconds.
.SAT...W winds 5 to 10 kt, becoming SW 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds
and SE 2 ft at 8 seconds.
.SAT NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and
SE 2 ft at 8 seconds.
.SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and E 2 ft at 8 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E
2 ft at 9 seconds.
.MON AND MON NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 10 seconds and SW 2 ft at 4 seconds.
.TUE THROUGH WED NIGHT...SE 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.

$$

ANZ232-271500-
Nantucket Sound-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...S winds around 5 kt, becoming W. Seas 1 foot or
less. Wave Detail: W 1 ft at 2 seconds and E 1 ft at 3 seconds.
.SAT...W winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: W 1 ft at 2 seconds and NE 1 ft at
4 seconds, becoming SW 1 ft at 3 seconds and N 1 ft at 3 seconds.
.SAT NIGHT...SW winds around 10 kt. Seas around 2 ft in the
evening, then 1 foot or less. Wave Detail: SW 1 ft at 4 seconds
and E 1 ft at 8 seconds.
.SUN...SW winds 10 to 15 kt. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: SW 1 ft at 4 seconds and E
1 ft at 9 seconds, becoming SW 2 ft at 4 seconds and E 1 ft at
10 seconds. A chance of showers in the morning.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after
midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and
E 1 ft at 10 seconds.
.MON AND MON NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: NW 1 ft at 3 seconds and SW 1 ft at 4 seconds.
.TUE...SE winds around 10 kt. Seas around 2 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Seas around 2 ft. A chance of
rain.
.WED AND WED NIGHT...E winds 10 to 15 kt, becoming SE. 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.

$$

ANZ233-271500-
Vineyard Sound-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...S winds around 5 kt, becoming SW. Seas 1 foot or
less. Wave Detail: SW 1 ft at 3 seconds and E 1 ft at 3 seconds.
Patchy frost.
.SAT...W winds 5 to 10 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 1 foot or less, then around 2 ft in the
afternoon. Wave Detail: W 1 ft at 3 seconds and S 1 ft at
7 seconds, becoming SW 1 ft at 3 seconds and SE 1 ft at
7 seconds.
.SAT NIGHT...SW winds 10 to 15 kt. Seas around 2 ft in the
evening, then 1 foot or less. Wave Detail: SW 2 ft at 5 seconds
and SE 1 ft at 8 seconds, becoming SW 1 ft at 5 seconds and SE
1 ft at 8 seconds.
.SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 1 foot
or less. Wave Detail: SW 1 ft at 5 seconds and SE 1 ft at
9 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after
midnight. Seas 1 foot or less. Wave Detail: SW 1 ft at 4 seconds
and SE 1 ft at 9 seconds.
.MON AND MON NIGHT...E winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: NE 1 ft at 2 seconds and W 1 ft at 4 seconds.
.TUE...SE winds 5 to 10 kt. Seas 1 foot or less.
.TUE NIGHT...SE winds around 10 kt. Seas around 2 ft. A chance of
rain.
.WED AND WED NIGHT...E winds around 10 kt, becoming SE. 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.

$$

ANZ234-271500-
Buzzards Bay-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...S winds around 5 kt, becoming SW. Seas 1 foot or
less. Wave Detail: NE 1 ft at 3 seconds and SW 1 ft at 4 seconds.
Patchy frost.
.SAT...SW 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. Wave Detail:
SW 1 ft at 3 seconds and NE 1 ft at 3 seconds.
.SAT NIGHT...SW 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: SW 2 ft at 4 seconds and SE 1 ft at 8 seconds,
becoming SW 1 ft at 4 seconds and SE 1 ft at 8 seconds.
.SUN...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Seas 1 foot or less. Wave Detail: SW 1 ft at 4 seconds
and SE 1 ft at 9 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after
midnight. Seas 1 foot or less. Wave Detail: SW 1 ft at 4 seconds
and SE 1 ft at 9 seconds.
.MON AND MON NIGHT...E winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: N 1 ft at 3 seconds and SW 1 ft at 4 seconds.
.TUE AND TUE NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less,
then around 2 ft. A chance of rain.
.WED AND WED NIGHT...NE winds around 10 kt, becoming SE. 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.

$$

ANZ235-271500-
Rhode Island Sound-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...S winds around 5 kt, becoming SW. Seas around 2 ft.
Wave Detail: SW 1 ft at 4 seconds and SE 1 ft at 8 seconds.
.SAT...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and S 1 ft at 7 seconds.
.SAT NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and
SE 2 ft at 8 seconds.
.SUN...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft
at 8 seconds.
.SUN NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 4 seconds and SE 1 ft at 9 seconds.
.MON AND MON NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SW 2 ft at 4 seconds and NE 1 ft at 2 seconds.
.TUE AND TUE NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. A
chance of rain.
.WED AND WED NIGHT...NE winds around 10 kt, becoming SE. 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.

$$

ANZ237-271500-
Block Island Sound-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...S winds 5 to 10 kt, becoming SW. Seas around 2 ft.
Wave Detail: SE 2 ft at 8 seconds and SW 1 ft at 4 seconds.
.SAT...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds
and SE 1 ft at 8 seconds.
.SAT NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and
SE 1 ft at 7 seconds.
.SUN...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 4 seconds and SE 2 ft at 8 seconds.
.SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 4 seconds and SE 2 ft at 9 seconds.
.MON AND MON NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 10 seconds and NE 1 ft at 2 seconds.
.TUE AND TUE NIGHT...E winds 5 to 10 kt. Seas around 2 ft. A
chance of rain.
.WED AND WED NIGHT...E winds around 10 kt, becoming SE. 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.

$$

ANZ230-271500-
Boston Harbor-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...S winds 5 to 10 kt. Waves 1 foot or less.
.SAT...SW winds 5 to 10 kt, becoming SE in the afternoon. Waves
1 foot or less.
.SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight.
Waves 1 foot or less.
.SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Waves 1 foot or less, then around 2 ft in the
afternoon.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W after midnight.
Waves around 2 ft in the evening, then 1 foot or less.
.MON...N winds around 10 kt, becoming E in the afternoon. Waves
1 foot or less.
.MON NIGHT...SE winds 5 to 10 kt. Waves 1 foot or less. A chance
of rain after midnight.
.TUE AND TUE NIGHT...SE winds 5 to 10 kt. Gusts up to 20 kt.
Waves 2 to 3 ft. A chance of rain.
.WED AND WED NIGHT...E winds around 10 kt, becoming SE. Waves
1 foot or less.

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.

$$

ANZ236-271500-
Narragansett Bay-
1006 PM EDT Fri Apr 26 2024

.OVERNIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.SAT...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Waves 1 foot or less, then around
2 ft in the afternoon.
.SAT 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.
.SUN...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves around 2 ft.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after
midnight. Waves around 2 ft.
.MON AND MON NIGHT...SE winds 5 to 10 kt. Waves around 2 ft.
.TUE AND TUE NIGHT...SE winds 5 to 10 kt. Waves around 2 ft. A
chance of rain.
.WED AND WED NIGHT...NE winds around 10 kt, becoming SE. 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.

$$

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
www.facebook.com/NWSBoston

You can follow us on Twitter at
@NWSBoston