Coastal Waters Forecast
Issued by NWS Boston, MA

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169
FZUS51 KBOX 221921
CWFBOX

Coastal Waters Forecast
National Weather Service Boston/Norton MA
321 PM EDT Sun Apr 22 2018

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

ANZ200-230815-
321 PM EDT Sun Apr 22 2018

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pressure remains over the waters through Monday, then shifts
the the east on Tuesday. Low pressure will move north along the
eastern seaboard Tuesday night and Wednesday, lifting over the
waters early Thursday. Another storm will be moving up along the
coast late Friday.

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.

$$

ANZ250-230815-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
321 PM EDT Sun Apr 22 2018

.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft.
.MON...N winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft.
.MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft.
.TUE...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 4 ft.
.TUE NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft. A chance of rain.
.WED...SE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 4 to 6 ft. Rain.
.WED NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 5 to 8 ft. Rain likely.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
7 ft.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 7 ft.
.FRI...S winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ251-230815-
Massachusetts Bay and Ipswich Bay-
321 PM EDT Sun Apr 22 2018

.TONIGHT...S winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft.
.MON...N winds around 5 kt, becoming SE with gusts up to 20 kt in
the afternoon. Seas around 2 ft.
.MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft.
.TUE...S winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 to 3 ft.
.TUE NIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 2 to 3 ft. A chance of rain.
.WED...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Rain.
.WED NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt,
becoming S 5 to 10 kt after midnight. Seas 3 to 5 ft. Rain
likely.
.THU...SW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft.
.FRI...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ231-230815-
Cape Cod Bay-
321 PM EDT Sun Apr 22 2018

.TONIGHT...S winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft.
.MON...N winds around 5 kt, becoming E with gusts up to 20 kt in
the afternoon. Seas 2 to 3 ft.
.MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft.
.TUE...S winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of
rain.
.WED...SE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Rain. Vsby 1 to
3 NM.
.WED NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Rain likely.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft.
.FRI...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 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.

$$

ANZ254-230815-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
321 PM EDT Sun Apr 22 2018

.TONIGHT...W winds 5 to 10 kt. Seas around 2 ft.
.MON...N winds around 5 kt, becoming E around 5 kt in the
afternoon. Seas around 2 ft.
.MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft.
.TUE...S winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Seas 2 to 4 ft. A chance of
rain.
.WED...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to
8 ft. Rain. Vsby 1 NM or less.
.WED NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 7 to 10 ft. Rain likely.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to
9 ft.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas
4 to 7 ft.
.FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ255-230815-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
321 PM EDT Sun Apr 22 2018

.TONIGHT...W winds 5 to 10 kt. Seas around 2 ft.
.MON...N winds around 5 kt, becoming E with gusts up to 20 kt in
the afternoon. Seas around 2 ft.
.MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft.
.TUE...S winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 3 to 5 ft. A chance of rain.
.WED...SE winds 15 to 20 kt, increasing to 20 to 25 kt in the
afternoon. Gusts up to 30 kt. Seas 6 to 9 ft. Rain. Vsby 1 NM or
less.
.WED NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 8 to 11 ft. Rain likely.
.THU...SW winds 15 to 20 kt. Seas 6 to 9 ft.
.THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 7 ft.
.FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ256-230815-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
321 PM EDT Sun Apr 22 2018

.TONIGHT...SW winds around 10 kt, becoming NW after midnight.
Seas around 2 ft.
.MON...N winds around 5 kt, becoming SE in the afternoon. Seas
around 2 ft.
.MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft.
.TUE...S winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 3 to 5 ft. A chance of rain.
.WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 7 to
10 ft. Rain. Vsby 1 NM or less.
.WED NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after
midnight. Seas 9 to 12 ft. Rain likely.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to
9 ft.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 7 ft.
.FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft. A chance of showers.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
5 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.

$$

ANZ232-230815-
Nantucket Sound-
321 PM EDT Sun Apr 22 2018

.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft.
.MON...N winds around 5 kt, becoming E with gusts up to 20 kt in
the afternoon. Seas 2 to 3 ft.
.MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft.
.TUE...S winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
rain.
.WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft. Rain. Vsby 1 to 3 NM.
.WED NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Rain likely.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft.
.FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of showers.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ233-230815-
Vineyard Sound-
321 PM EDT Sun Apr 22 2018

.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming
NW 5 to 10 kt after midnight. Seas around 2 ft.
.MON...N winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft.
.MON NIGHT...S winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.
.TUE...S winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
rain.
.WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft. Rain. Vsby 1 NM or less.
.WED NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after
midnight. Seas 2 to 4 ft. Rain likely.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft.
.FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ234-230815-
Buzzards Bay-
321 PM EDT Sun Apr 22 2018

.TONIGHT...SW winds 10 to 15 kt, becoming NW around 5 kt after
midnight. Seas around 2 ft.
.MON...N winds around 5 kt, becoming SE 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft.
.MON NIGHT...S winds 10 to 15 kt with gusts up to 20 kt,
diminishing to around 5 kt after midnight. Seas 2 to 3 ft.
.TUE...S winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...S winds 5 to 10 kt, becoming SE 10 to 15 kt after
midnight. Seas around 2 ft. A chance of rain.
.WED...SE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Rain. Vsby 1 to
3 NM.
.WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming
SW 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain likely.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft.
.FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 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.

$$

ANZ235-230815-
Rhode Island Sound-
321 PM EDT Sun Apr 22 2018

.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming
NW 5 to 10 kt after midnight. Seas around 2 ft.
.MON...NE winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft.
.MON NIGHT...S winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.
.TUE...S winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 3 to 5 ft. A chance of rain.
.WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
8 ft. Rain. Vsby 1 NM or less.
.WED NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after
midnight. Seas 7 to 10 ft. Rain likely.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to
8 ft.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 7 ft.
.FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of showers.
.FRI NIGHT...S 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.

$$

ANZ237-230815-
Block Island Sound-
321 PM EDT Sun Apr 22 2018

.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft.
.MON...NE winds around 5 kt, becoming SE 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft.
.MON NIGHT...S winds 5 to 10 kt with gusts up to 20 kt,
diminishing to around 5 kt after midnight. Seas 2 to 3 ft.
.TUE...S winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 4 ft. A chance of rain.
.WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
8 ft. Rain. Vsby 1 NM or less.
.WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming
SW after midnight. Seas 5 to 8 ft. Rain likely.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
7 ft.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 6 ft.
.FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of showers.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ230-230815-
Boston Harbor-
321 PM EDT Sun Apr 22 2018

.TONIGHT...S winds around 5 kt, becoming NW after midnight. Waves
1 foot or less.
.MON...N winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less.
.MON NIGHT...S winds 5 to 10 kt. Waves 1 foot or less.
.TUE...S winds 5 to 10 kt. Waves 1 foot or less.
.TUE NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. A chance
of rain.
.WED...SE winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Waves 2 to 3 ft. Rain.
.WED NIGHT...SE winds 5 to 10 kt, becoming SW after midnight.
Waves 2 to 3 ft. Rain likely.
.THU...W winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.
.THU NIGHT...W winds 5 to 10 kt. Waves around 2 ft.
.FRI...S winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.
.FRI NIGHT...S winds 5 to 10 kt with gusts up to 20 kt. Waves
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.

$$

ANZ236-230815-
Narragansett Bay-
321 PM EDT Sun Apr 22 2018

.TONIGHT...SW winds 5 to 10 kt, becoming N after midnight. Waves
around 2 ft.
.MON...N winds around 5 kt, becoming SE 10 to 15 kt with gusts up
to 20 kt in the afternoon. Waves 2 to 3 ft.
.MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Waves 2 to 3 ft.
.TUE...S winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. Waves around 2 ft.
.TUE NIGHT...SE winds 5 to 10 kt. Waves 2 to 4 ft. A chance of
rain.
.WED...SE winds 10 to 15 kt with gusts up to 20 kt. Waves 3 to
5 ft. Rain. Vsby 1 NM or less.
.WED NIGHT...SE winds 10 to 15 kt, becoming SW 5 to 10 kt after
midnight. Waves 4 to 6 ft. Rain likely.
.THU...W winds 10 to 15 kt with gusts up to 20 kt. Waves 3 to
5 ft.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves
2 to 4 ft.
.FRI...S winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers.
.FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Waves
2 to 3 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.

$$

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