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

983
FZUS51 KBOX 220402
CWFBOX

Coastal Waters Forecast
National Weather Service Boston/Norton MA
1202 AM EDT Mon Oct 22 2018

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

ANZ200-221715-
1202 AM EDT Mon Oct 22 2018

.Synopsis for Massachusetts and Rhode Island coastal waters...

A high pres ridge will build south of the waters today. Low pres
will then track across northern New England Tue, dragging a cold
front across the waters Tue night. High pres will build E from the
Great Lakes Wed and Thu.

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.

$$

ANZ250-221715-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1202 AM EDT Mon Oct 22 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING...

.REST OF TONIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Seas around 8 ft.
.MON...W winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas around 6 ft, subsiding to 4 ft
in the afternoon.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas around 3 ft.
.TUE...S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. A chance of showers.
.TUE NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 3 to 4 ft. A chance of showers
in the evening.
.WED...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to
5 ft.
.WED NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. Gusts up to 30 kt. Seas 4 to 5 ft.
.THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
6 ft.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
5 to 6 ft.
.FRI...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Seas 3 to 4 ft.
.FRI NIGHT...NW 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.

$$

ANZ251-221715-
Massachusetts Bay and Ipswich Bay-
1202 AM EDT Mon Oct 22 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING...

.REST OF TONIGHT...NW winds 15 to 20 kt with gusts up to 30 kt.
Seas around 5 ft.
.MON...W winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Gusts up to 20 kt. Seas around 4 ft, subsiding to 2 ft
in the afternoon.
.MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.
.TUE...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. A chance of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. A chance of showers in the evening.
.WED...NW winds 10 to 15 kt with gusts up to 30 kt. Seas around
3 ft.
.WED NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 30 kt. Seas around 3 ft.
.THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around
3 ft.
.THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas around 3 ft.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.FRI NIGHT...NW 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.

$$

ANZ231-221715-
Cape Cod Bay-
1202 AM EDT Mon Oct 22 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...NW winds 10 to 15 kt with gusts up to 30 kt.
Seas around 6 ft.
.MON...W winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Gusts up to 20 kt. Seas around 4 ft, subsiding to 2 ft
in the afternoon.
.MON NIGHT...SW winds 5 to 10 kt, diminishing to around 5 kt
after midnight. Seas around 2 ft in the evening, then 1 foot or
less. A chance of showers after midnight.
.TUE...S winds 5 to 10 kt. Gusts up to 25 kt in the afternoon.
Seas 1 foot or less, then around 2 ft in the afternoon. A chance
of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
around 2 ft. A chance of showers in the evening.
.WED...NW winds 10 to 15 kt with gusts up to 30 kt. Seas 3 to
4 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
3 to 4 ft.
.THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
around 4 ft.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft in the
evening, then 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.

$$

ANZ254-221715-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1202 AM EDT Mon Oct 22 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING...

.REST OF TONIGHT...NW winds 10 to 15 kt with gusts up to 30 kt.
Seas around 9 ft.
.MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas around
7 ft, subsiding to 5 ft in the afternoon.
.MON NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of
showers after midnight.
.TUE...S winds 5 to 10 kt. Gusts up to 25 kt in the afternoon.
Seas 3 to 4 ft. A chance of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
around 5 ft. A chance of showers in the evening.
.WED...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around
5 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
5 to 6 ft.
.THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around
6 ft.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
around 6 ft.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
5 ft.
.FRI NIGHT...NW 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.

$$

ANZ255-221715-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1202 AM EDT Mon Oct 22 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING...

.REST OF TONIGHT...NW winds 10 to 15 kt with gusts up to 30 kt.
Seas around 8 ft.
.MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to
6 ft.
.MON NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Gusts up to 20 kt. Seas around 4 ft.
.TUE...SW winds 10 to 15 kt. Gusts up to 30 kt. Seas around 4 ft,
building to 6 ft in the afternoon. A chance of showers.
.TUE NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas
6 to 7 ft.
.WED...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to
6 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
around 5 ft.
.THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to
5 ft.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
around 5 ft.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
4 ft.
.FRI NIGHT...N 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.

$$

ANZ256-221715-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1202 AM EDT Mon Oct 22 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING...

.REST OF TONIGHT...NW winds 15 to 20 kt with gusts up to 30 kt.
Seas around 7 ft.
.MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas around
4 ft.
.MON NIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after
midnight. Gusts up to 20 kt. Seas around 4 ft.
.TUE...SW winds 10 to 15 kt. Gusts up to 30 kt. Seas around 4 ft,
building to 6 ft in the afternoon.
.TUE NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas
6 to 7 ft.
.WED...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around
5 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 5 ft.
.THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around
4 ft.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft.
.FRI NIGHT...N winds around 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.

$$

ANZ232-221715-
Nantucket Sound-
1202 AM EDT Mon Oct 22 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...NW winds 5 to 10 kt with gusts up to 25 kt.
Seas around 4 ft.
.MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas around
3 ft.
.MON NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. A chance of showers after midnight.
.TUE...S winds 5 to 10 kt, becoming SW 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. A chance of
showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
around 3 ft. A chance of showers in the evening.
.WED...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around
3 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
around 3 ft.
.THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around
3 ft.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
around 3 ft.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.FRI NIGHT...NW 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.

$$

ANZ233-221715-
Vineyard Sound-
1202 AM EDT Mon Oct 22 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt.
Seas around 3 ft.
.MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
becoming W 5 to 10 kt after midnight. Seas around 2 ft. A chance
of showers after midnight.
.TUE...S winds 5 to 10 kt, becoming SW 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas around 2 ft, building to 4 ft
in the afternoon. A chance of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 30 kt. Seas
3 to 4 ft.
.WED...NW winds around 15 kt with gusts up to 30 kt. Seas around
3 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
around 3 ft.
.THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around
3 ft.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 3 ft.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft in the morning, then 1 foot or less.
.FRI NIGHT...N 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.

$$

ANZ234-221715-
Buzzards Bay-
1202 AM EDT Mon Oct 22 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt.
Seas around 2 ft.
.MON...W winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Gusts up to 20 kt. Seas around 2 ft.
.MON NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. A chance of showers after midnight.
.TUE...SW winds 5 to 10 kt. Gusts up to 25 kt in the afternoon.
Seas around 2 ft, building to 4 ft in the afternoon. A chance of
showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
around 4 ft, subsiding to 2 ft after midnight.
.WED...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around
3 ft.
.WED NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 30 kt. Seas around 3 ft.
.THU...NW winds 10 to 15 kt with gusts up to 30 kt. Seas around
3 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft.
.FRI...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. Seas around 2 ft in the morning,
then 1 foot or less.
.FRI NIGHT...NW 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.

$$

ANZ235-221715-
Rhode Island Sound-
1202 AM EDT Mon Oct 22 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...NW winds 15 to 20 kt with gusts up to 25 kt.
Seas around 5 ft.
.MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas around
3 ft.
.MON 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.
.TUE...SW winds 10 to 15 kt. Gusts up to 30 kt. Seas around 3 ft,
building to 5 ft in the afternoon. A chance of showers.
.TUE NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 5 ft.
.WED...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to
4 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
around 3 ft.
.THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around
3 ft.
.THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 30 kt. Seas around 3 ft.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around
2 ft.
.FRI NIGHT...N 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.

$$

ANZ237-221715-
Block Island Sound-
1202 AM EDT Mon Oct 22 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt.
Seas around 4 ft.
.MON...W winds 5 to 10 kt with gusts up to 20 kt. Seas around
3 ft.
.MON NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas around 3 ft.
.TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 3 to 4 ft. A chance of
showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
around 4 ft.
.WED...NW winds 10 to 15 kt with gusts up to 30 kt. Seas around
3 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
around 3 ft.
.THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around
3 ft.
.THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 2 to 3 ft.
.FRI...NW winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas around 2 ft in the morning, then 1 foot or less.
.FRI NIGHT...N 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.

$$

ANZ230-221715-
Boston Harbor-
1202 AM EDT Mon Oct 22 2018

.REST OF TONIGHT...NW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.MON...W winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Waves around 2 ft in the morning, then 1 foot or less.
.MON NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.TUE...S winds around 5 kt. Waves 1 foot or less. A chance of
showers.
.TUE NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Waves 1 foot or less. A chance of showers in the
evening.
.WED...NW winds around 10 kt with gusts up to 25 kt. Waves around
2 ft.
.WED NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves
around 2 ft.
.THU...NW winds 10 to 15 kt with gusts up to 25 kt. Waves around
2 ft.
.THU NIGHT...NW winds around 10 kt with gusts up to 25 kt. Waves
around 2 ft.
.FRI...NW winds 5 to 10 kt. Waves around 2 ft in the morning,
then 1 foot or less.
.FRI 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.

$$

ANZ236-221715-
Narragansett Bay-
1202 AM EDT Mon Oct 22 2018

.REST OF TONIGHT...NW winds 5 to 10 kt with gusts up to 20 kt.
Waves around 2 ft.
.MON...W winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Waves around 2 ft.
.MON NIGHT...SW winds 5 to 10 kt, diminishing to around 5 kt
after midnight. Waves around 2 ft.
.TUE...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Waves 2 to 3 ft. A chance of showers.
.TUE NIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt after
midnight. Gusts up to 20 kt. Waves 2 to 3 ft.
.WED...NW winds 10 to 15 kt with gusts up to 25 kt. Waves around
3 ft.
.WED NIGHT...NW winds 10 to 15 kt with gusts up to 30 kt. Waves
around 3 ft.
.THU...NW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to
3 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves
around 2 ft.
.FRI...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Waves 1 foot or less.
.FRI NIGHT...N winds 5 to 10 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.

$$

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.