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

000
FZUS51 KBOX 130829
CWFBOX

Coastal Waters Forecast
National Weather Service Taunton MA
329 AM EST Wed Dec 13 2017

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

ANZ200-132115-
329 AM EST Wed Dec 13 2017

.Synopsis for Massachusetts and Rhode Island coastal waters...
A Gale center will move into the Maritimes today. Low pres will
track south of New Eng late tonight and early Thu. High pres
builds into the region Fri, then another low pres will track to
the north late Fri night and Sat. High pressure builds over the
waters on Sunday.

For information on possible hazardous weather beyond the 24-36
hour forecast period, please visit www.weather.gov/boston and
follow the Current Hazards link above the map on the left.

$$

ANZ250-132115-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT FROM 10 AM EST THIS MORNING THROUGH
LATE TONIGHT...

.TODAY...W winds 20 to 25 kt with gusts up to 30 kt, increasing
to 25 to 30 kt with gusts up to 40 kt this afternoon. Seas 7 to
10 ft.
.TONIGHT...W winds 25 to 30 kt, diminishing to 20 to 25 kt after
midnight. Gusts up to 40 kt. Seas 6 to 9 ft.
.THU...W winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to
6 ft.
.THU NIGHT...W winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. Gusts up to 30 kt. Seas 3 to 5 ft.
.FRI...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft.
.FRI NIGHT...W winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Seas 2 to 3 ft.
.SAT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft.
.SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 6 ft.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 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.

$$

ANZ251-132115-
Massachusetts Bay and Ipswich Bay-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT FROM 10 AM EST THIS MORNING THROUGH
LATE TONIGHT...

.TODAY...W winds 20 to 25 kt with gusts up to 30 kt, increasing
to 25 to 30 kt with gusts up to 40 kt this afternoon. Seas 4 to
6 ft.
.TONIGHT...W winds 25 to 30 kt with gusts up to 40 kt,
diminishing to 15 to 20 kt with gusts up to 30 kt after midnight.
Seas 3 to 5 ft.
.THU...W winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.
.THU NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 30 kt. Seas 2 to 4 ft.
.FRI...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW
5 to 10 kt in the afternoon. Seas around 2 ft.
.FRI NIGHT...W winds 5 to 10 kt. Seas 1 foot or less.
.SAT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft.
.SAT NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft.
.SUN...W winds 5 to 10 kt with gusts up to 20 kt. Seas around
2 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. A chance of rain and snow 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.

$$

ANZ231-132115-
Cape Cod Bay-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT FROM 10 AM EST THIS MORNING THROUGH
LATE TONIGHT...

.TODAY...W winds 20 to 25 kt with gusts up to 30 kt, increasing
to 25 to 30 kt with gusts up to 40 kt this afternoon. Seas 4 to
7 ft.
.TONIGHT...W winds 25 to 30 kt with gusts up to 40 kt,
diminishing to 15 to 20 kt with gusts up to 30 kt after midnight.
Seas 4 to 6 ft. A chance of snow.
.THU...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. A chance of snow.
.THU NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 2 to 4 ft.
.FRI...W winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...W winds 5 to 10 kt. Seas 1 foot or less.
.SAT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft.
.SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
2 to 4 ft.
.SUN...W winds 5 to 10 kt with gusts up to 20 kt. Seas around
2 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. A chance of rain and snow 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.

$$

ANZ254-132115-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT FROM 10 AM EST THIS MORNING THROUGH
LATE TONIGHT...

.TODAY...W winds 25 to 30 kt with gusts up to 45 kt. Seas 7 to
10 ft, except 9 to 14 ft S and E of Nantucket.
.TONIGHT...W winds 25 to 30 kt, diminishing to 20 to 25 kt after
midnight. Gusts up to 40 kt. Seas 6 to 9 ft, except 8 to 13 ft S
and E of Nantucket. A chance of snow. Vsby 1 to 3 NM.
.THU...W winds 10 to 15 kt, becoming NW 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 4 to 7 ft. A chance of snow.
Vsby 1 NM or less.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 7 ft.
.FRI...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW
5 to 10 kt in the afternoon. Seas 2 to 4 ft.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 2 to 4 ft. A chance of
snow and rain showers. Vsby 1 to 3 NM.
.SAT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to
7 ft. A chance of snow showers. Vsby 1 to 3 NM.
.SAT NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
4 to 7 ft.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 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.

$$

ANZ255-132115-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TODAY...W winds 25 to 35 kt with gusts up to 45 kt. Seas 9 to
14 ft. A chance of snow showers this morning. A slight chance of
snow showers this afternoon.
.TONIGHT...W winds 25 to 30 kt with gusts up to 40 kt,
diminishing to 20 to 25 kt with gusts up to 30 kt after midnight.
Seas 8 to 13 ft. A chance of snow. Vsby 1 to 3 NM.
.THU...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to
8 ft. Snow likely. Vsby 1 NM or less.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
5 to 8 ft.
.FRI...W winds 5 to 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 3 to 5 ft. A chance of
rain and snow showers. Vsby 1 to 3 NM.
.SAT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to
8 ft. A chance of snow showers. Vsby 1 to 3 NM.
.SAT NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
5 to 8 ft.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of showers.
.SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 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.

$$

ANZ256-132115-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TODAY...W winds 25 to 35 kt with gusts up to 45 kt. Seas 8 to
13 ft. A slight chance of snow showers.
.TONIGHT...W winds 25 to 30 kt with gusts up to 40 kt,
diminishing to 20 to 25 kt with gusts up to 30 kt after midnight.
Seas 8 to 11 ft. Snow likely. Vsby 1 to 3 NM.
.THU...NW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 5 to 8 ft. Snow likely. Vsby
1 to 3 NM.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
5 to 8 ft.
.FRI...W winds 5 to 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...W winds around 10 kt, becoming NW 15 to 20 kt with
gusts up to 25 kt after midnight. Seas 3 to 5 ft. A chance of
rain and snow showers. Vsby 1 to 3 NM.
.SAT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
7 ft. A chance of snow showers. Vsby 1 to 3 NM.
.SAT NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
4 to 7 ft.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 7 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.

$$

ANZ232-132115-
Nantucket Sound-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TODAY...W winds 20 to 25 kt, increasing to 25 to 30 kt this
afternoon. Gusts up to 40 kt. Seas 3 to 5 ft.
.TONIGHT...W winds 25 to 30 kt with gusts up to 40 kt,
diminishing to 15 to 20 kt with gusts up to 30 kt after midnight.
Seas 3 to 5 ft. A chance of snow. Vsby 1 to 3 NM.
.THU...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. A chance of snow. Vsby 1 to 3 NM.
.THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 2 to 4 ft.
.FRI...W winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 2 to 3 ft.
.SAT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft.
.SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
2 to 4 ft.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 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.

$$

ANZ233-132115-
Vineyard Sound-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT FROM 8 AM EST THIS MORNING THROUGH LATE
TONIGHT...

.TODAY...W winds 20 to 25 kt, increasing to 25 to 30 kt this
afternoon. Gusts up to 40 kt. Seas 4 to 6 ft.
.TONIGHT...W winds 25 to 30 kt, diminishing to 15 to 20 kt after
midnight. Seas 4 to 6 ft. Snow likely.
.THU...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. A chance of snow.
.THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft.
.FRI...W winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt with
gusts up to 20 kt after midnight. Seas around 2 ft. A chance of
snow showers. Vsby 1 to 3 NM.
.SAT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
3 ft.
.SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
2 to 3 ft.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.SUN NIGHT...SW winds around 15 kt with gusts up to 25 kt. Seas
2 to 4 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.

$$

ANZ234-132115-
Buzzards Bay-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT FROM 8 AM EST THIS MORNING THROUGH LATE
TONIGHT...

.TODAY...W winds 20 to 25 kt with gusts up to 40 kt. Seas 3 to
5 ft.
.TONIGHT...W winds 20 to 25 kt, diminishing to 15 to 20 kt after
midnight. Gusts up to 35 kt. Seas 2 to 4 ft. A chance of snow.
.THU...NW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. A chance of snow.
.THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft.
.FRI...W winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.SAT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
3 ft.
.SAT NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 3 ft.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of rain and snow 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.

$$

ANZ235-132115-
Rhode Island Sound-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TODAY...W winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to
9 ft.
.TONIGHT...W winds 25 to 30 kt, diminishing to 20 to 25 kt after
midnight. Seas 6 to 9 ft. Snow likely. Vsby 1 to 3 NM.
.THU...NW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 4 to 6 ft. A chance of snow.
.THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 4 to 6 ft.
.FRI...W winds 5 to 10 kt. Seas 2 to 4 ft.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 2 to 3 ft. A chance of
snow showers. Vsby 1 to 3 NM.
.SAT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to
5 ft.
.SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
2 to 4 ft.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft.
.SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 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.

$$

ANZ237-132115-
Block Island Sound-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TODAY...W winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to
8 ft.
.TONIGHT...W winds 25 to 30 kt, diminishing to 15 to 20 kt after
midnight. Seas 4 to 7 ft. A chance of snow. Vsby 1 to 3 NM.
.THU...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft. A chance of snow.
.THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 ft.
.FRI...W winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 2 to 3 ft. A chance of
snow showers. Vsby 1 to 3 NM.
.SAT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft.
.SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
2 to 4 ft.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 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.

$$

ANZ230-132115-
Boston Harbor-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT FROM 10 AM EST THIS MORNING THROUGH
LATE TONIGHT...

.TODAY...W winds 20 to 25 kt. Gusts up to 30 kt, increasing to
40 kt this afternoon. Waves around 2 ft.
.TONIGHT...W winds 20 to 25 kt, diminishing to 10 to 15 kt after
midnight. Gusts up to 35 kt. Waves around 2 ft.
.THU...W winds 10 to 15 kt with gusts up to 25 kt. Waves around
2 ft.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Waves
around 2 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 foot or less.
.FRI NIGHT...W winds 5 to 10 kt. Waves 1 foot or less.
.SAT...NW winds 5 to 10 kt with gusts up to 20 kt. Waves 1 foot
or less.
.SAT NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Waves
1 foot or less.
.SUN...W winds 5 to 10 kt. Waves 1 foot or less. A chance of snow
showers.
.SUN NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. A chance
of snow 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.

$$

ANZ236-132115-
Narragansett Bay-
329 AM EST Wed Dec 13 2017

...GALE WARNING IN EFFECT FROM 10 AM EST THIS MORNING THROUGH
THIS EVENING...

.TODAY...W winds 15 to 20 kt with gusts up to 30 kt, increasing
to 20 to 25 kt with gusts up to 40 kt this afternoon. Waves
around 3 ft, except 4 to 7 ft at the bay entrance.
.TONIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Gusts up to 35 kt. Waves 2 to 4 ft. A chance of snow.
.THU...NW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Waves 2 to 3 ft. A chance of snow.
.THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt,
diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft.
.FRI...W winds around 5 kt. Waves around 2 ft.
.FRI NIGHT...W winds 5 to 10 kt. Waves around 2 ft.
.SAT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to
3 ft.
.SAT NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves
2 to 3 ft.
.SUN...W winds 5 to 10 kt. Waves 1 foot or less.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves
2 to 3 ft. A chance of rain and snow 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.

$$

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


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.