Coastal Waters Forecast
Issued by NWS Boston, MA

Home |  Current Version |  Previous Version |  Text Only |  Print | Product List |  Glossary On
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
155
FZUS51 KBOX 121104
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
704 AM EDT Wed Jun 12 2024

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

ANZ200-130000-
704 AM EDT Wed Jun 12 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
Weak high pressure will remain over the waters through Thu. Winds
become gusty out of the SW Thursday before A cold front over the
Great Lakes is expected to cross the region Fri. Thunderstorms could
accompany the cold front. High pressure will build back into New
England over the weekend.

$$

ANZ250-130000-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
704 AM EDT Wed Jun 12 2024

.TODAY...SW winds around 5 kt, becoming S around 5 kt this
afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds.
Patchy fog. Vsby 1 to 3 NM.
.TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 8 seconds and S 1 foot at 3 seconds. Patchy fog. Vsby
1 to 3 NM.
.THU...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: SE 3 ft
at 8 seconds and SW 2 ft at 3 seconds.
.THU NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: S 3 ft at 5 seconds.
.FRI...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft. Wave Detail: SW 3 ft at 4 seconds and SE 3 ft at 7 seconds.
A chance of showers in the afternoon with vsby 1 to 3 NM.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming W after midnight. Seas 3 to 5 ft. Wave Detail: SW 3 ft
at 4 seconds and SE 3 ft at 7 seconds. Showers likely in the
evening. A chance of showers after midnight. Vsby 1 to 3 NM in
the evening.
.SAT THROUGH SUN 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.

$$

ANZ251-130000-
Massachusetts Bay and Ipswich Bay-
704 AM EDT Wed Jun 12 2024

.TODAY...NW winds around 5 kt, becoming SE this afternoon. Seas
1 foot or less. Wave Detail: E 1 foot at 8 seconds. Isolated
showers this afternoon with vsby 1 to 3 NM.
.TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 6 seconds and S 1 foot at
3 seconds.
.THU...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: E 2 ft
at 8 seconds and SW 1 foot at 2 seconds.
.THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: S 3 ft at 4 seconds.
.FRI...SW winds around 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 6 seconds.
A chance of showers in the afternoon with vsby 1 to 3 NM.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 3 seconds and SE 2 ft at 6 seconds. Showers in the evening. A
chance of showers after midnight. Vsby 1 to 3 NM in the evening.
.SAT THROUGH SUN NIGHT...SW winds 5 to 10 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.

$$

ANZ231-130000-
Cape Cod Bay-
704 AM EDT Wed Jun 12 2024

.TODAY...S winds around 5 kt. Seas 1 foot or less. Wave Detail:
SW 1 foot at 3 seconds and SE 1 foot at 6 seconds.
.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 2 seconds and SE 1 foot at 7 seconds.
.THU...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: SW
1 foot at 2 seconds and SE 1 foot at 7 seconds.
.THU NIGHT...SW 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 SE 1 foot at
7 seconds.
.FRI...SW winds around 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 7 seconds.
A chance of showers in the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: SW 2 ft at 3 seconds and SE 2 ft at 7 seconds. Showers
likely.
.SAT THROUGH SUN NIGHT...SW winds 5 to 10 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.

$$

ANZ254-130000-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
704 AM EDT Wed Jun 12 2024

.TODAY...S winds around 5 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds. Patchy fog. Vsby 1 NM or less, increasing to
1 to 3 NM this afternoon.
.TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 8 seconds and SW 1 foot at 3 seconds. Patchy fog. Vsby
1 NM or less.
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 3 seconds and SE 2 ft at 7 seconds.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at
8 seconds.
.FRI...S winds around 15 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 3 ft at 8 seconds.
.FRI NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE
3 ft at 8 seconds. Showers likely.
.SAT THROUGH SUN NIGHT...SW 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.

$$

ANZ255-130000-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
704 AM EDT Wed Jun 12 2024

.TODAY...SW winds around 5 kt, increasing to 5 to 10 kt this
afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds.
Patchy fog. Vsby 1 to 3 NM.
.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 7 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM
or less after midnight.
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 3 seconds and SE 2 ft at 7 seconds.
.THU NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds
and S 3 ft at 8 seconds.
.FRI...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: S 4 ft at 6 seconds.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming W after midnight. Seas 2 to 4 ft. Wave Detail: SW 3 ft
at 5 seconds and SE 3 ft at 8 seconds. Showers likely.
.SAT THROUGH SUN NIGHT...SW 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.

$$

ANZ256-130000-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
704 AM EDT Wed Jun 12 2024

.TODAY...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds and SW 1 foot at 2 seconds.
.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and SE 2 ft at 7 seconds.
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 4 seconds and SE 2 ft at 7 seconds. Patchy fog. Vsby 1 NM
or less.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 3 ft at
8 seconds.
.FRI...S winds around 15 kt with gusts up to 20 kt. Seas around
4 ft. Wave Detail: S 3 ft at 6 seconds. A chance of showers in
the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming W after midnight. Seas 3 to 4 ft. Wave Detail: SW 3 ft
at 5 seconds and SE 2 ft at 8 seconds. Showers likely. Vsby 1 to
3 NM.
.SAT THROUGH SUN NIGHT...SW winds 5 to 10 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.

$$

ANZ232-130000-
Nantucket Sound-
704 AM EDT Wed Jun 12 2024

.TODAY...SW winds around 5 kt, increasing to 5 to 10 kt this
afternoon. Seas 1 foot or less. Wave Detail: SW 1 foot at
5 seconds and SE 1 foot at 8 seconds.
.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 3 seconds and SE 1 foot at 8 seconds.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot
at 7 seconds.
.THU NIGHT...SW 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.
.FRI...SW winds 15 to 20 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
7 seconds. A chance of showers in the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming W after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and SE 1 foot at 7 seconds. Showers likely.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 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.

$$

ANZ233-130000-
Vineyard Sound-
704 AM EDT Wed Jun 12 2024

.TODAY...SW winds around 5 kt, increasing to 5 to 10 kt this
afternoon. Seas 1 foot or less. Wave Detail: S 1 foot at
6 seconds. Patchy fog this morning with vsby 1 to 3 NM.
.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 3 seconds and S 1 foot at 7 seconds.
.THU...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 4 seconds and S 1 foot at 7 seconds.
.THU NIGHT...SW 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 S 1 foot at
8 seconds.
.FRI...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: S 3 ft at 6 seconds. A chance of showers in
the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: S 2 ft at 6 seconds. Showers likely.
.SAT THROUGH SUN NIGHT...SW winds 5 to 10 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.

$$

ANZ234-130000-
Buzzards Bay-
704 AM EDT Wed Jun 12 2024

.TODAY...SW winds around 5 kt, increasing to 5 to 10 kt this
afternoon. Seas 1 foot or less. Wave Detail: S 1 foot at
6 seconds.
.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 3 seconds and SE 1 foot at 7 seconds.
.THU...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 foot at 7 seconds.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and S 1 foot at
8 seconds.
.FRI...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and S 2 ft at 7 seconds.
A chance of showers in the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: S 2 ft at 6 seconds. Showers likely.
.SAT THROUGH SUN NIGHT...SW winds 5 to 10 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.

$$

ANZ235-130000-
Rhode Island Sound-
704 AM EDT Wed Jun 12 2024

.TODAY...W winds around 5 kt, becoming SW this afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at
3 seconds.
.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and SE 2 ft at 7 seconds.
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 4 seconds and SE 2 ft at 7 seconds. Patchy fog. Vsby 1 NM
or less.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and S 2 ft at
8 seconds.
.FRI...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: S 3 ft at 6 seconds. A chance of showers in
the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming W after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at
6 seconds. Showers likely.
.SAT THROUGH SUN NIGHT...SW winds 5 to 10 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.

$$

ANZ237-130000-
Block Island Sound-
704 AM EDT Wed Jun 12 2024

.TODAY...W winds around 5 kt, becoming SW this afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at
2 seconds.
.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds and SW 1 foot at 3 seconds.
.THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 3 seconds and S 2 ft at 7 seconds.
.THU NIGHT...SW 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 2 ft at
8 seconds.
.FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
3 ft. Wave Detail: S 3 ft at 6 seconds. A chance of showers in
the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: S 2 ft at 6 seconds. Showers likely in the evening. A
chance of showers after midnight. Vsby 1 to 3 NM.
.SAT THROUGH SUN NIGHT...SW winds 5 to 10 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.

$$

ANZ230-130000-
Boston Harbor-
704 AM EDT Wed Jun 12 2024

.TODAY...N winds around 5 kt, becoming SE around 5 kt this
afternoon. Waves 1 foot or less. Isolated showers this morning,
then scattered showers this afternoon.
.TONIGHT...SW winds around 5 kt. Waves 1 foot or less.
.THU...SW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves
around 2 ft.
.FRI...SW winds around 15 kt with gusts up to 20 kt. Waves around
2 ft. Showers likely in the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming NW after midnight. Waves around 2 ft in the evening,
then 1 foot or less. Showers with a chance of tstms in the
evening, then a chance of showers after midnight. Some tstms may
produce heavy rainfall in the evening.
.SAT THROUGH SUN NIGHT...S winds 5 to 10 kt. Waves 1 foot or
less.

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.

$$

ANZ236-130000-
Narragansett Bay-
704 AM EDT Wed Jun 12 2024

.TODAY...W winds around 5 kt, becoming S this afternoon. Waves
1 foot or less. Isolated showers this afternoon.
.TONIGHT...SW winds 5 to 10 kt. Waves around 2 ft.
.THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Waves around 2 ft.
.THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Waves 2 to 3 ft.
.FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft. A chance of showers in the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after
midnight. Waves 2 to 3 ft. Showers likely in the evening. A
chance of showers after midnight.
.SAT THROUGH SUN NIGHT...SW 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.

$$

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