Coastal Waters Forecast
Issued by NWS Boston, MA

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FZUS51 KBOX 180516
CWFBOX

Coastal Waters Forecast
National Weather Service Boston/Norton MA
116 AM EDT Wed Apr 18 2018

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

ANZ200-181800-
116 AM EDT Wed Apr 18 2018

.Synopsis for Massachusetts and Rhode Island coastal waters...
Low pressure departs through the Maritimes tonight and Wednesday.
Brief weak high pres will move over the waters Wed, followed by
another low pressure area approaching from the southwest on Thu.
This low may linger near the Maritimes for Fri. High pres to build
over the waters this weekend.

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.

$$

ANZ250-181800-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
116 AM EDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

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

$$

ANZ251-181800-
Massachusetts Bay and Ipswich Bay-
116 AM EDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

.REST OF TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 5 ft.
.WED...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft.
.WED NIGHT...W winds 10 to 15 kt, becoming SW 5 to 10 kt after
midnight. Gusts up to 20 kt. Seas 2 to 4 ft. A chance of rain.
.THU...E winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft. Rain likely. Vsby 1 NM
or less.
.THU NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Rain likely. Vsby 1 NM or less.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. A chance of rain.
.FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT...NW winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.SUN...N winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...W winds 5 to 10 kt. Seas 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.

$$

ANZ231-181800-
Cape Cod Bay-
116 AM EDT Wed Apr 18 2018

.REST OF TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.
.WED...W winds 15 to 20 kt, becoming SW 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 3 ft.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
SW 5 to 10 kt after midnight. Seas around 2 ft. A chance of rain.
.THU...E winds 5 to 10 kt, becoming NE in the afternoon. Seas
around 2 ft. A chance of rain. Vsby 1 NM or less.
.THU NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Rain likely. Vsby 1 NM or less.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. A chance of rain.
.FRI NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft.
.SAT...NW winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less.
.SUN...N winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...W winds 5 to 10 kt. Seas 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.

$$

ANZ254-181800-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
116 AM EDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF TONIGHT...W winds 10 to 15 kt with gusts up to 25 kt.
Seas 5 to 7 ft. A slight chance of rain and snow showers.
.WED...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to
8 ft.
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt,
diminishing to 5 to 10 kt with gusts up to 20 kt after midnight.
Seas 4 to 7 ft. A chance of rain.
.THU...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of rain. Vsby 1 NM or less.
.THU NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 7 ft. A chance of rain. Vsby 1 NM or less.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft. A chance of rain.
.FRI NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 3 to 5 ft.
.SAT...NW winds 5 to 10 kt. Seas 2 to 4 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.SUN...NW winds 5 to 10 kt. Seas around 2 ft.
.SUN NIGHT...W winds 5 to 10 kt. Seas 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.

$$

ANZ255-181800-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
116 AM EDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF TONIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 7 to 9 ft. A slight chance of rain and snow showers.
.WED...W winds 15 to 20 kt, becoming SW 20 to 25 kt in the
afternoon. Gusts up to 30 kt. Seas 6 to 9 ft.
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt,
diminishing to 5 to 10 kt with gusts up to 20 kt after midnight.
Seas 4 to 7 ft. A chance of rain.
.THU...SE winds 10 to 15 kt, becoming SW in the afternoon. Gusts
up to 20 kt. Seas 4 to 6 ft. A chance of rain. Vsby 1 NM or less.
.THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
5 to 8 ft. A chance of rain. Vsby 1 NM or less.
.FRI...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Seas 4 to 7 ft.
.FRI NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 3 to 5 ft.
.SAT...NW winds 10 to 15 kt. Seas 2 to 4 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.SUN...W winds 5 to 10 kt. Seas around 2 ft.
.SUN NIGHT...W winds 5 to 10 kt. Seas 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.

$$

ANZ256-181800-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
116 AM EDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF TONIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 6 to 9 ft.
.WED...W winds 15 to 20 kt, becoming SW 20 to 25 kt in the
afternoon. Gusts up to 30 kt. Seas 6 to 8 ft.
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt,
becoming S 5 to 10 kt after midnight. Seas 4 to 7 ft. Rain
likely.
.THU...SE winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 4 to 7 ft. A chance of rain. Vsby
1 NM or less.
.THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
6 to 9 ft. A chance of rain. Vsby 1 to 3 NM.
.FRI...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 4 to 7 ft. A chance of rain.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft.
.SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.SUN...W winds around 10 kt. Seas around 2 ft.
.SUN NIGHT...W 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.

$$

ANZ232-181800-
Nantucket Sound-
116 AM EDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. A slight chance of rain and snow showers.
.WED...W winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft.
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain
likely.
.THU...E winds 5 to 10 kt, becoming NW in the afternoon. Seas
2 to 3 ft. A chance of rain. Vsby 1 NM or less.
.THU NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 2 to 3 ft. A chance of
rain. Vsby 1 NM or less.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of rain.
.FRI NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft.
.SAT...NW winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...W winds 5 to 10 kt. Seas 1 foot or less.
.SUN...NW winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...W winds around 5 kt. Seas 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.

$$

ANZ233-181800-
Vineyard Sound-
116 AM EDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. A slight chance of rain and snow showers.
.WED...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft.
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain
likely.
.THU...E winds 5 to 10 kt, becoming NW in the afternoon. Seas
2 to 3 ft. A chance of rain. Vsby 1 NM or less.
.THU NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 2 to 4 ft. Rain likely.
Vsby 1 to 3 NM.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. A chance of rain.
.FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT...NW winds around 10 kt. Seas around 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less.
.SUN...W winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...W winds 5 to 10 kt. Seas 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.

$$

ANZ234-181800-
Buzzards Bay-
116 AM EDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.
.WED...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft.
.WED NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain
likely.
.THU...E winds 5 to 10 kt, becoming NW in the afternoon. Seas
2 to 3 ft. A chance of rain. Vsby 1 to 3 NM.
.THU NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft. Rain likely. Vsby 1 to 3 NM.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. A chance of rain.
.FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.SAT...NW winds 5 to 10 kt. Seas 1 foot or less.
.SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less.
.SUN...W winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...W winds 5 to 10 kt. Seas 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.

$$

ANZ235-181800-
Rhode Island Sound-
116 AM EDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...W winds 15 to 20 kt. Seas 5 to 7 ft.
.WED...W winds 15 to 20 kt, becoming SW 20 to 25 kt in the
afternoon. Gusts up to 30 kt. Seas 5 to 7 ft.
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt,
becoming S 5 to 10 kt after midnight. Seas 4 to 6 ft. Rain
likely.
.THU...E winds 5 to 10 kt, becoming NW in the afternoon. Seas
3 to 5 ft. A chance of rain. Vsby 1 NM or less.
.THU NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 4 to 7 ft. Rain likely.
Vsby 1 to 3 NM.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. Seas 3 to 5 ft. A chance of rain.
.FRI NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 20 kt. Seas 2 to 3 ft.
.SAT...NW winds around 10 kt with gusts up to 20 kt. Seas around
2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less.
.SUN...W winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...W winds 5 to 10 kt. Seas 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.

$$

ANZ237-181800-
Block Island Sound-
116 AM EDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 6 ft.
.WED...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft.
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt,
becoming S 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain
likely.
.THU...SE winds 5 to 10 kt, becoming NW in the afternoon. Seas
2 to 4 ft. A chance of rain. Vsby 1 NM or less.
.THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
4 to 6 ft. A chance of rain. Vsby 1 to 3 NM.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. A chance of rain.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft.
.SAT...NW winds around 10 kt. Seas around 2 ft.
.SAT NIGHT...NW winds around 10 kt. Seas 1 foot or less.
.SUN...W winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...W winds 5 to 10 kt. Seas 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.

$$

ANZ230-181800-
Boston Harbor-
116 AM EDT Wed Apr 18 2018

.REST OF TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt.
Waves around 2 ft.
.WED...W winds 10 to 15 kt with gusts up to 25 kt. Waves around
2 ft.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
SW around 5 kt after midnight. Waves around 2 ft. A chance of
rain.
.THU...E winds 5 to 10 kt. Waves 1 foot or less. Rain likely.
Vsby 1 NM or less.
.THU NIGHT...N winds around 10 kt. Waves 1 foot or less. Rain
likely. Vsby 1 to 3 NM.
.FRI...NW winds 5 to 10 kt. Waves 1 foot or less. A chance of
rain.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less.
.SAT...NW winds 5 to 10 kt. Waves 1 foot or less.
.SAT NIGHT...NW winds around 5 kt. Waves 1 foot or less.
.SUN...N winds around 5 kt. Waves 1 foot or less.
.SUN NIGHT...W winds around 5 kt. 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.

$$

ANZ236-181800-
Narragansett Bay-
116 AM EDT Wed Apr 18 2018

.REST OF TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 4 ft.
.WED...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Waves 2 to 4 ft.
.WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming S around 5 kt after midnight. Waves 2 to 4 ft. Rain
likely.
.THU...E winds 5 to 10 kt, becoming N in the afternoon. Waves
2 to 3 ft. Rain likely. Vsby 1 to 3 NM.
.THU NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Waves 2 to 3 ft. Rain likely. Vsby 1 to 3 NM.
.FRI...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Waves 2 to 3 ft. A chance of rain.
.FRI NIGHT...NW winds 5 to 10 kt. Waves around 2 ft.
.SAT...NW winds 5 to 10 kt. Waves 1 foot or less.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less.
.SUN...W winds around 5 kt. Waves 1 foot or less.
.SUN NIGHT...W winds around 5 kt. 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.

$$

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