Marine Forecast Map
Click on any of the red dots to view the marine forecast for that area.
Major US Cities
Marine Forecast Report


FZUS51 KBOX 130617
CWFBOX

Coastal Waters Forecast
National Weather Service Boston/Norton MA
116 AM EST Thu Dec 13 2018

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

ANZ200-131900-
116 AM EST Thu Dec 13 2018

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres builds S from Quebec tonight into Thu. Expect ocean
effect snow bands to develop under N/NW winds across the ern MA
waters tonight. This high pres will shift E of the waters on Fri. A
storm system will approach the waters from the SW Fri night and
Sat, lifting slowly across the waters Sat night and Sun. High
pressure builds back towards the waters from the west on Tuesday.

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.

$$

ANZ250-131900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
116 AM EST Thu Dec 13 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EST EARLY THIS
MORNING...

.REST OF TONIGHT...NE winds 5 to 10 kt. Seas 4 to 5 ft.
.THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas
2 to 4 ft.
.THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...S 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.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft. Rain likely.
.SAT...SW winds 10 to 15 kt, becoming NW in the afternoon. Gusts
up to 20 kt. Seas 2 to 4 ft. Rain likely.
.SAT NIGHT...N winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft.
.SUN...NE winds 15 to 20 kt. Seas 5 to 7 ft.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas
5 to 8 ft.
.MON...N winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to
9 ft.
.MON NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
7 to 9 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.

$$

ANZ251-131900-
Massachusetts Bay and Ipswich Bay-
116 AM EST Thu Dec 13 2018

.REST OF TONIGHT...NE winds 5 to 10 kt. Seas 2 to 4 ft.
.THU...E winds 5 to 10 kt, becoming SE in the afternoon. Seas
2 to 3 ft.
.THU NIGHT...S winds around 5 kt. Seas around 2 ft.
.FRI...S winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt after
midnight. Gusts up to 20 kt. Seas around 2 ft. Rain likely.
.SAT...SW winds 5 to 10 kt, becoming NW in the afternoon. Gusts
up to 20 kt. Seas around 2 ft. Rain likely.
.SAT NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 6 ft.
.MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
7 ft.
.MON NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
5 to 7 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.

$$

ANZ231-131900-
Cape Cod Bay-
116 AM EST Thu Dec 13 2018

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

$$

ANZ254-131900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
116 AM EST Thu Dec 13 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM EST THIS MORNING...

.REST OF TONIGHT...NE winds 5 to 10 kt. Seas 4 to 6 ft.
.THU...E winds 5 to 10 kt, diminishing to around 5 kt in the
afternoon. Seas 3 to 5 ft.
.THU NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...SE winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Seas around 3 ft.
.FRI NIGHT...S winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to
4 ft. Rain likely.
.SAT...SW winds around 10 kt, becoming NW in the afternoon. Gusts
up to 20 kt. Seas 3 to 5 ft. Rain likely.
.SAT NIGHT...N winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 7 ft.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to
9 ft.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 30 kt. Seas
6 to 9 ft. A chance of rain.
.MON...N winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to
9 ft. A chance of rain.
.MON NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
6 to 9 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.

$$

ANZ255-131900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
116 AM EST Thu Dec 13 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EST EARLY THIS
MORNING...

.REST OF TONIGHT...NE winds around 10 kt. Seas 3 to 5 ft.
.THU...E winds 5 to 10 kt. Seas 2 to 4 ft.
.THU NIGHT...E winds 10 to 15 kt, becoming SE 5 to 10 kt after
midnight. Seas 2 to 3 ft.
.FRI...SE winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft.
.FRI NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Rain likely.
.SAT...S winds around 10 kt, becoming E in the afternoon. Gusts
up to 25 kt. Seas 3 to 5 ft. Rain likely.
.SAT NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas
5 to 8 ft. A chance of rain.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 7 to
9 ft. A chance of rain.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas
6 to 9 ft. A chance of rain.
.MON...N winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to
8 ft. A chance of rain.
.MON NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
5 to 7 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.

$$

ANZ256-131900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
116 AM EST Thu Dec 13 2018

.REST OF TONIGHT...NE winds around 10 kt. Seas 2 to 3 ft.
.THU...E winds around 10 kt. Seas 2 to 3 ft.
.THU NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft.
.FRI...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft.
.FRI NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Rain likely.
.SAT...SE winds 10 to 15 kt, becoming NE in the afternoon. Gusts
up to 25 kt. Seas 3 to 5 ft. Rain likely.
.SAT NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas
5 to 8 ft. A chance of rain.
.SUN...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 8 to
10 ft. A chance of rain.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas
7 to 10 ft. A chance of rain.
.MON...N winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to
8 ft. A chance of rain.
.MON NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 6 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.

$$

ANZ232-131900-
Nantucket Sound-
116 AM EST Thu Dec 13 2018

.REST OF TONIGHT...NE winds 5 to 10 kt. Seas 2 to 4 ft.
.THU...E winds 5 to 10 kt. Seas around 2 ft.
.THU NIGHT...SE winds 5 to 10 kt. Seas around 2 ft.
.FRI...SE winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Rain likely.
.SAT...S winds 5 to 10 kt, becoming N with gusts up to 20 kt in
the afternoon. Seas 2 to 3 ft. Rain likely.
.SAT NIGHT...N winds 10 to 15 kt, becoming NE 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 3 to 5 ft. A chance of rain.
.SUN...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to
6 ft.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas
4 to 6 ft. A chance of rain.
.MON...N winds 10 to 15 kt with gusts up to 30 kt. Seas 3 to
5 ft. A chance of rain.
.MON NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
3 to 5 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.

$$

ANZ233-131900-
Vineyard Sound-
116 AM EST Thu Dec 13 2018

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

$$

ANZ234-131900-
Buzzards Bay-
116 AM EST Thu Dec 13 2018

.REST OF TONIGHT...NE winds 5 to 10 kt. Seas around 2 ft.
.THU...E winds 5 to 10 kt. Seas 1 foot or less.
.THU NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less.
.FRI...SE winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Rain likely.
.SAT...SE winds 5 to 10 kt, becoming N with gusts up to 20 kt in
the afternoon. Seas around 2 ft. Rain likely.
.SAT NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 ft.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 4 ft. A chance of rain.
.MON...N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. A chance of rain.
.MON NIGHT...NW winds 10 to 15 kt with gusts up to 25 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.

$$

ANZ235-131900-
Rhode Island Sound-
116 AM EST Thu Dec 13 2018

.REST OF TONIGHT...NE winds around 10 kt. Seas 2 to 3 ft.
.THU...E winds around 10 kt. Seas around 2 ft.
.THU NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...SE winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft.
.FRI NIGHT...S winds 5 to 10 kt. Seas around 3 ft. Rain likely.
.SAT...SE winds 5 to 10 kt, becoming NE 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Rain likely.
.SAT NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 7 ft.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
7 ft.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 7 ft. A chance of rain.
.MON...N winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft. A chance of rain.
.MON NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
3 to 5 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.

$$

ANZ237-131900-
Block Island Sound-
116 AM EST Thu Dec 13 2018

.REST OF TONIGHT...NE winds around 10 kt. Seas 2 to 3 ft.
.THU...E winds around 10 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft.
.THU NIGHT...E winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft.
.FRI...SE winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft.
.FRI NIGHT...S winds 5 to 10 kt. Seas around 3 ft. Rain likely.
.SAT...SE winds 5 to 10 kt, becoming NE in the afternoon. Gusts
up to 20 kt. Seas 3 to 4 ft. Rain.
.SAT NIGHT...N winds 10 to 15 kt, becoming NE 15 to 20 kt after
midnight. Gusts up to 30 kt. Seas 4 to 7 ft.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
8 ft.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas
4 to 7 ft. A chance of rain.
.MON...N winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to
6 ft. A chance of rain.
.MON NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
3 to 5 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.

$$

ANZ230-131900-
Boston Harbor-
116 AM EST Thu Dec 13 2018

.REST OF TONIGHT...NE winds 5 to 10 kt. Waves around 2 ft.
.THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Waves
around 2 ft.
.THU NIGHT...S winds around 5 kt. Waves 1 foot or less.
.FRI...S winds around 5 kt. Waves 1 foot or less.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. Rain
likely.
.SAT...SW winds 5 to 10 kt, becoming NW in the afternoon. Waves
1 foot or less. Rain likely.
.SAT NIGHT...N winds around 10 kt with gusts up to 20 kt. Waves
around 2 ft.
.SUN...NE winds 5 to 10 kt. Waves 2 to 3 ft.
.SUN NIGHT...NE winds 5 to 10 kt. Waves around 2 ft.
.MON...N winds around 10 kt with gusts up to 20 kt. Waves around
2 ft, except 3 to 5 ft at the outer harbor entrance.
.MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Waves
around 2 ft, except 3 to 5 ft at the outer harbor entrance.

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.

$$

ANZ236-131900-
Narragansett Bay-
116 AM EST Thu Dec 13 2018

.REST OF TONIGHT...NE winds 5 to 10 kt. Waves 1 foot or less.
.THU...E winds 5 to 10 kt. Waves 1 foot or less.
.THU NIGHT...E winds 5 to 10 kt. Waves around 2 ft.
.FRI...SE winds 5 to 10 kt. Waves 2 to 3 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 2 to 3 ft. Rain likely.
.SAT...SE winds 5 to 10 kt, becoming N with gusts up to 20 kt in
the afternoon. Waves 2 to 3 ft. Rain likely.
.SAT NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Waves
2 to 3 ft.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft, except 4 to 7 ft at the bay entrance.
.SUN NIGHT...NE winds around 10 kt with gusts up to 20 kt. Waves
2 to 3 ft. A chance of rain.
.MON...N winds around 10 kt with gusts up to 20 kt. Waves 2 to
3 ft. A chance of rain.
.MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Waves
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.

$$

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

More in Boat & Beach
Featured Tool:

View complete marine weather reports for various on and off-shore locations.
Boat & Beach Weather Maps
Advertisements