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Hurricane Symbol Storm Special! View the latest observations near Atlantic Tropical Depression Eleven and East Pacific Tropical Depression Ten-E.

National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 131116
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
716 AM EDT Thu Aug 13 2020

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

ANZ200-140000-
716 AM EDT Thu Aug 13 2020

Synopsis for Massachusetts and Rhode Island coastal waters

A cold front will stall around or just south of the southern coastal
waters through Friday. High pressure over the Canadian Maritimes
dominates the weather this weekend into early next week. 

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.



ANZ250-140000-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
716 AM EDT Thu Aug 13 2020

TODAY
N winds around 5 kt. Seas around 2 ft. Patchy fog. Vsby
1 NM or less.

TONIGHT
SE winds around 5 kt, becoming NW after midnight. Seas
around 2 ft. Patchy fog. Vsby 1 NM or less.

FRI
NE winds 5 to 10 kt. Seas around 2 ft. Patchy dense fog.
Vsby 1 NM or less.

FRI NIGHT
NE winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft.

SAT AND SAT NIGHT
NE winds 15 to 20 kt with gusts up to 25 kt.
Seas 4 to 6 ft.

SUN AND SUN NIGHT
E winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 7 ft. A chance of showers.

MON AND MON NIGHT
SE winds around 10 kt, becoming SW. Gusts up
to 20 kt. Seas 5 to 8 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.



ANZ251-140000-
Massachusetts Bay and Ipswich Bay-
716 AM EDT Thu Aug 13 2020

TODAY
NE winds around 5 kt. Seas 1 foot or less.

TONIGHT
SE winds around 5 kt, becoming NW after midnight. Seas
1 foot or less.

FRI
NE winds 5 to 10 kt. Seas around 2 ft.

FRI NIGHT
NE winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft.

SAT
NE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.

SAT NIGHT
NE winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 ft.

SUN THROUGH MON NIGHT
SW winds 10 to 15 kt with gusts up to
20 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.



ANZ231-140000-
Cape Cod Bay-
716 AM EDT Thu Aug 13 2020

TODAY
N winds 5 to 10 kt. Seas 1 foot or less. A slight chance
of showers. Patchy fog this morning with vsby 1 NM or less.

TONIGHT
E winds around 5 kt, becoming N after midnight. Seas
1 foot or less.

FRI
NE winds around 5 kt. Seas 1 foot or less.

FRI NIGHT
NE winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft.

SAT
NE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of
showers.

SAT NIGHT
NE winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft.

SUN THROUGH MON 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.



ANZ254-140000-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
716 AM EDT Thu Aug 13 2020

TODAY
W winds around 5 kt. Seas 2 to 3 ft. Patchy fog. Vsby
1 NM or less.

TONIGHT
NE winds around 5 kt, becoming NW after midnight. Seas
around 2 ft. Patchy fog. Vsby 1 NM or less.

FRI
NE winds 5 to 10 kt. Seas around 2 ft. Patchy dense fog.
Vsby 1 NM or less.

FRI NIGHT
NE winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Seas 2 to 4 ft.

SAT
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
7 ft. A chance of showers.

SAT NIGHT
NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 4 to 7 ft.

SUN THROUGH MON NIGHT
SW winds 10 to 15 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.



ANZ255-140000-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
716 AM EDT Thu Aug 13 2020

TODAY
W winds around 5 kt. Seas around 2 ft. Patchy fog this
morning. A slight chance of showers this morning with vsby 1 NM
or less.

TONIGHT
E winds around 5 kt, becoming NW after midnight. Seas
around 2 ft. Patchy fog. Vsby 1 NM or less.

FRI
E winds 5 to 10 kt. Seas around 2 ft.

FRI NIGHT
NE winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 20 kt. Seas 3 to 5 ft.

SAT AND SAT NIGHT
NE winds 15 to 20 kt with gusts up to 30 kt.
Seas 4 to 7 ft.

SUN
E winds around 15 kt with gusts up to 25 kt. Seas 4 to
6 ft.

SUN NIGHT AND MON
SE winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 6 ft. A chance of showers.

MON NIGHT
W winds 5 to 10 kt with gusts up to 20 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.



ANZ256-140000-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
716 AM EDT Thu Aug 13 2020

TODAY
W winds around 5 kt. Seas around 2 ft. Patchy fog this
morning. A slight chance of showers this morning with vsby 1 NM
or less.

TONIGHT
SE winds around 5 kt, becoming N around 5 kt after
midnight. Seas around 2 ft.

FRI
E winds 5 to 10 kt. Seas around 2 ft.

FRI NIGHT
E winds 5 to 10 kt, becoming NE 10 to 15 kt after
midnight. Gusts up to 20 kt. Seas 3 to 5 ft.

SAT AND SAT NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt.
Seas 4 to 7 ft.

SUN
E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
7 ft.

SUN NIGHT AND MON
SE winds 10 to 15 kt, becoming S. Gusts up
to 25 kt. Seas 3 to 5 ft. A chance of showers.

MON NIGHT
W winds 5 to 10 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.



ANZ232-140000-
Nantucket Sound-
716 AM EDT Thu Aug 13 2020

TODAY
W winds around 5 kt. Seas 1 foot or less. A slight
chance of showers. Patchy fog this morning with vsby 1 NM or
less.

TONIGHT
NE winds around 5 kt, becoming N after midnight. Seas
1 foot or less. Patchy fog. Vsby 1 NM or less.

FRI
E winds 5 to 10 kt. Seas 1 foot or less.

FRI NIGHT
E winds 5 to 10 kt, becoming NE 10 to 15 kt after
midnight. Gusts up to 20 kt. Seas 2 to 3 ft.

SAT
NE winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft. A chance of showers.

SAT NIGHT
NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 2 to 4 ft.

SUN THROUGH MON NIGHT
W 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.



ANZ233-140000-
Vineyard Sound-
716 AM EDT Thu Aug 13 2020

TODAY
W winds around 5 kt. Seas 1 foot or less. A slight
chance of showers. Patchy fog this morning with vsby 1 NM or
less.

TONIGHT
E winds around 5 kt, becoming N around 5 kt after
midnight. Seas 1 foot or less.

FRI
E winds 5 to 10 kt. Seas 1 foot or less.

FRI NIGHT
NE winds 5 to 10 kt with gusts up to 20 kt. Seas
around 2 ft.

SAT
NE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 2 to 4 ft. A chance of
showers.

SAT NIGHT
NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 2 to 4 ft.

SUN THROUGH MON NIGHT
W 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.



ANZ234-140000-
Buzzards Bay-
716 AM EDT Thu Aug 13 2020

TODAY
N winds around 5 kt, becoming SW this afternoon. Seas
1 foot or less. A slight chance of showers this morning, then a
chance of showers this afternoon. Patchy fog this morning with
vsby 1 NM or less.

TONIGHT
E winds around 5 kt, becoming N after midnight. Seas
1 foot or less.

FRI
E winds 5 to 10 kt. Seas 1 foot or less.

FRI NIGHT
NE winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Seas 1 foot or less.

SAT
NE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 2 to 4 ft. A chance of
showers.

SAT NIGHT
NE winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft.

SUN THROUGH MON NIGHT
W 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.



ANZ235-140000-
Rhode Island Sound-
716 AM EDT Thu Aug 13 2020

TODAY
NW winds around 5 kt, becoming SW this afternoon. Seas
around 2 ft. A slight chance of showers. Patchy fog this morning
with vsby 1 NM or less.

TONIGHT
E winds around 5 kt, becoming N after midnight. Seas
around 2 ft.

FRI
E winds 5 to 10 kt. Seas around 2 ft.

FRI NIGHT
E winds 5 to 10 kt, becoming NE 10 to 15 kt after
midnight. Gusts up to 20 kt. Seas 2 to 4 ft.

SAT AND SAT NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt.
Seas 3 to 5 ft.

SUN THROUGH MON
S winds 10 to 15 kt with gusts up to 25 kt.
Seas 3 to 5 ft. A chance of showers.

MON NIGHT
W winds 5 to 10 kt. Seas 2 to 4 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.



ANZ237-140000-
Block Island Sound-
716 AM EDT Thu Aug 13 2020

TODAY
N winds around 5 kt, becoming S this afternoon. Seas
around 2 ft. A slight chance of showers. Patchy fog this morning
with vsby 1 NM or less.

TONIGHT
SE winds around 5 kt, becoming NE after midnight. Seas
1 foot or less.

FRI
E winds 5 to 10 kt. Seas around 2 ft.

FRI NIGHT
E winds 5 to 10 kt, becoming NE 10 to 15 kt after
midnight. Gusts up to 20 kt. Seas 2 to 4 ft.

SAT AND SAT NIGHT
NE winds 15 to 20 kt with gusts up to 30 kt.
Seas 3 to 5 ft.

SUN THROUGH MON
S winds 10 to 15 kt with gusts up to 25 kt.
Seas 3 to 5 ft. A chance of showers.

MON NIGHT
NW winds 5 to 10 kt. Seas 3 to 4 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.



ANZ230-140000-
Boston Harbor-
716 AM EDT Thu Aug 13 2020

TODAY
N winds around 5 kt, becoming E this afternoon. Waves
1 foot or less.

TONIGHT
E winds around 5 kt, becoming NW after midnight. Waves
1 foot or less.

FRI
NE winds 5 to 10 kt. Waves 1 foot or less.

FRI NIGHT
NE winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Waves around 2 ft.

SAT
NE winds 10 to 15 kt with gusts up to 25 kt. Waves around
2 ft. A chance of showers.

SAT NIGHT
NE winds 10 to 15 kt with gusts up to 25 kt. Waves
around 2 ft.

SUN THROUGH MON NIGHT
SW winds 5 to 10 kt with gusts up to
20 kt. Waves around 2 ft, except 3 to 5 ft at the outer harbor
entrance. 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.



ANZ236-140000-
Narragansett Bay-
716 AM EDT Thu Aug 13 2020

TODAY
N winds around 5 kt, becoming S this afternoon. Waves
around 2 ft. A slight chance of showers this morning, then a
chance of showers with isolated tstms this afternoon. Patchy fog
this morning with vsby 1 to 3 NM.

TONIGHT
SE winds around 5 kt, becoming N after midnight. Waves
1 foot or less.

FRI
E winds 5 to 10 kt. Waves 1 foot or less.

FRI NIGHT
NE winds 5 to 10 kt. Gusts up to 20 kt after
midnight. Waves around 2 ft.

SAT AND SAT NIGHT
NE winds 10 to 15 kt with gusts up to 30 kt.
Waves 2 to 3 ft.

SUN THROUGH MON NIGHT
NW winds 10 to 15 kt with gusts up to
25 kt. Waves 2 to 4 ft. A chance of showers. 

Winds and waves higher in and near tstms.

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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