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Hurricane Symbol Storm Special! View the latest observations near Atlantic Hurricane Sam.

National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 282242
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
642 PM EDT Tue Sep 28 2021

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

ANZ200-291100-
642 PM EDT Tue Sep 28 2021

Synopsis for Massachusetts and Rhode Island coastal waters

A cold front will produce gusty winds for the waters off of southern
New England through this afternoon. Unsettled weather with a chance
of showers will persist for much of the week. High pressure arrives
with dry weather for the coming weekend.

For additional information on possible hazardous weather for the
week ahead, please visit www.weather.gov/boston/ehwo



ANZ250-291100-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
642 PM EDT Tue Sep 28 2021

SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING


TONIGHT
N winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers,
mainly this evening. Patchy fog this evening with vsby 1 to 3 NM.

WED
N winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 3 to 5 ft.

WED NIGHT
N winds around 10 kt with gusts up to 20 kt. Seas
3 to 4 ft. A chance of showers.

THU
N winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 3 to 4 ft. A chance of showers.

THU NIGHT THROUGH FRI NIGHT
NW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 4 ft.

SAT
NW winds 5 to 10 kt. Seas 3 to 5 ft.

SAT NIGHT THROUGH SUN NIGHT
NE winds 5 to 10 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.



ANZ251-291100-
Massachusetts Bay and Ipswich Bay-
642 PM EDT Tue Sep 28 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH WEDNESDAY MORNING...

TONIGHT
N winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog this
evening. A chance of showers this evening with vsby 1 to 3 NM.

WED
N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.

WED NIGHT
N winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers.

THU
N winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. A chance of showers.

THU NIGHT THROUGH FRI NIGHT
NW winds around 10 kt. Seas 2 to
3 ft.

SAT
NW winds 5 to 10 kt. Seas 2 to 3 ft.

SAT NIGHT
N winds 5 to 10 kt. Seas 2 to 4 ft. A chance of
showers.

SUN
NE winds 5 to 10 kt. Seas 3 to 5 ft. A chance of showers.

SUN NIGHT
NE winds 5 to 10 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.



ANZ231-291100-
Cape Cod Bay-
642 PM EDT Tue Sep 28 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH WEDNESDAY MORNING...

TONIGHT
N winds 10 to 15 kt with gusts up to 25 kt. Seas
around 2 ft. Showers likely with a slight chance of tstms this
evening, then a slight chance of showers after midnight.

WED
N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft.

WED NIGHT
N winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers.

THU
N winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft. A chance of showers.

THU NIGHT THROUGH FRI NIGHT
NW winds 10 to 15 kt. Seas 2 to
3 ft.

SAT
NW winds 5 to 10 kt. Seas 2 to 3 ft.

SAT NIGHT THROUGH SUN NIGHT
NE winds 5 to 10 kt. Seas 2 to
4 ft. A chance of showers. 

Winds and seas 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.



ANZ254-291100-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
642 PM EDT Tue Sep 28 2021

SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING


TONIGHT
NW winds 10 to 15 kt, becoming N after midnight. Gusts
up to 25 kt. Seas 3 to 5 ft. Showers likely with a slight chance
of tstms this evening, then a chance of showers after midnight.
Vsby 1 to 3 NM this evening.

WED
N winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
5 ft.

WED NIGHT
N winds 10 to 15 kt, becoming NW 5 to 10 kt after
midnight. Gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers.

THU
N winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 3 to 4 ft. A chance of showers.

THU NIGHT
NW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of
showers.

FRI AND FRI NIGHT
NW winds 10 to 15 kt. Seas 3 to 5 ft.

SAT
NW winds around 10 kt. Seas 4 to 5 ft.

SAT NIGHT THROUGH SUN NIGHT
NE winds around 10 kt. Seas 4 to
7 ft. A chance of showers. 

Winds and seas 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.



ANZ255-291100-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
642 PM EDT Tue Sep 28 2021

SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING


TONIGHT
W winds 10 to 15 kt, becoming N 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 3 to 5 ft. A slight chance of
tstms. Showers likely this evening, then a chance of showers
after midnight.

WED
N winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 3 to 5 ft.

WED NIGHT
N winds 10 to 15 kt, becoming NW 5 to 10 kt after
midnight. Gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers.

THU
NW winds 10 to 15 kt. Gusts up to 25 kt in the morning.
Seas 2 to 4 ft. A chance of showers.

THU NIGHT THROUGH FRI NIGHT
NW winds 10 to 15 kt. Seas 2 to
4 ft.

SAT
NW winds around 10 kt. Seas 3 to 5 ft.

SAT NIGHT THROUGH SUN NIGHT
NE winds around 10 kt. Seas 4 to
6 ft. A chance of showers. 

Winds and seas 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.



ANZ256-291100-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
642 PM EDT Tue Sep 28 2021

SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING


TONIGHT
NW winds 10 to 15 kt, becoming N 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Showers likely with
a slight chance of tstms this evening, then a chance of showers
after midnight.

WED
N winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 3 to 5 ft.

WED NIGHT
N winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 20 kt. Seas 2 to 3 ft.

THU
N winds 10 to 15 kt. Gusts up to 25 kt in the morning.
Seas 3 to 4 ft.

THU NIGHT
N winds 10 to 15 kt. Seas 3 to 4 ft.

FRI AND FRI NIGHT
NW winds 10 to 15 kt. Seas 3 to 4 ft.

SAT
NW winds around 10 kt. Seas 3 to 5 ft.

SAT NIGHT THROUGH SUN NIGHT
NE winds around 10 kt. Seas 4 to
6 ft. A chance of showers. 

Winds and seas 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.



ANZ232-291100-
Nantucket Sound-
642 PM EDT Tue Sep 28 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH WEDNESDAY MORNING...

TONIGHT
NW winds 10 to 15 kt, becoming N after midnight. Gusts
up to 25 kt. Seas 2 to 3 ft. Showers likely with a slight chance
of tstms this evening, then a chance of showers after midnight.

WED
N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft.

WED NIGHT
N winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers.

THU
N winds around 10 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft. A chance of showers.

THU NIGHT THROUGH FRI NIGHT
NW winds around 10 kt. Seas around
2 ft.

SAT
NW winds around 10 kt. Seas 2 to 3 ft.

SAT NIGHT THROUGH SUN NIGHT
NE winds around 10 kt. Seas 2 to
4 ft. A chance of showers. 

Winds and seas 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.



ANZ233-291100-
Vineyard Sound-
642 PM EDT Tue Sep 28 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH WEDNESDAY MORNING...

TONIGHT
NW winds 10 to 15 kt, becoming N after midnight. Gusts
up to 25 kt. Seas 2 to 3 ft. Showers likely with a slight chance
of tstms this evening, then a chance of showers after midnight.

WED
N winds around 15 kt, diminishing to around 10 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 3 ft.

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

THU
N winds around 10 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft.

THU NIGHT THROUGH FRI NIGHT
NW winds around 10 kt. Seas around
2 ft.

SAT
NW winds around 10 kt. Seas 2 to 3 ft.

SAT NIGHT THROUGH SUN NIGHT
NE winds 5 to 10 kt. Seas 2 to
4 ft. A chance of showers. 

Winds and seas 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.



ANZ234-291100-
Buzzards Bay-
642 PM EDT Tue Sep 28 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH WEDNESDAY MORNING...

TONIGHT
NW winds 10 to 15 kt, becoming N after midnight. Gusts
up to 25 kt. Seas 2 to 3 ft. Showers likely with a slight chance
of tstms this evening, then a slight chance of showers after
midnight.

WED
N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft.

WED NIGHT
N winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to
3 ft.

THU
NW winds around 10 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft.

THU NIGHT THROUGH FRI NIGHT
NW winds around 10 kt. Seas around
2 ft.

SAT
W winds around 10 kt. Seas 2 to 3 ft.

SAT NIGHT THROUGH SUN NIGHT
NE winds 5 to 10 kt. Seas 2 to
4 ft. A chance of showers. 

Winds and seas 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.



ANZ235-291100-
Rhode Island Sound-
642 PM EDT Tue Sep 28 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH WEDNESDAY MORNING...

TONIGHT
NW winds 10 to 15 kt, becoming N 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Showers likely with
a slight chance of tstms this evening, then a slight chance of
showers after midnight.

WED
N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft.

WED NIGHT
N winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to
3 ft.

THU
N winds around 10 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft.

THU NIGHT
NW winds 10 to 15 kt. Seas 2 to 3 ft.

FRI AND FRI NIGHT
NW winds around 10 kt. Seas 2 to 3 ft.

SAT
W winds around 10 kt. Seas 2 to 4 ft.

SAT NIGHT THROUGH SUN NIGHT
NE winds around 10 kt. Seas 3 to
5 ft. A chance of showers. 

Winds and seas 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.



ANZ237-291100-
Block Island Sound-
642 PM EDT Tue Sep 28 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH WEDNESDAY MORNING...

TONIGHT
NW winds 10 to 15 kt, becoming N after midnight. Gusts
up to 25 kt. Seas 2 to 4 ft. Showers likely with a slight chance
of tstms this evening, then a slight chance of showers after
midnight.

WED
N winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.

WED NIGHT
N winds 5 to 10 kt with gusts up to 20 kt. Seas
around 2 ft.

THU
NW winds around 10 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft.

THU NIGHT
N winds 10 to 15 kt. Seas 2 to 3 ft.

FRI AND FRI NIGHT
NW winds around 10 kt. Seas 2 to 3 ft.

SAT
NW winds around 10 kt. Seas 2 to 4 ft.

SAT NIGHT THROUGH SUN NIGHT
NE winds 5 to 10 kt. Seas 3 to
5 ft. A chance of showers. 

Winds and seas 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.



ANZ230-291100-
Boston Harbor-
642 PM EDT Tue Sep 28 2021

TONIGHT
N winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Waves around 2 ft. Showers likely
this evening.

WED
N winds 10 to 15 kt with gusts up to 20 kt, diminishing to
5 to 10 kt in the afternoon. Waves around 2 ft.

WED NIGHT
NW winds 5 to 10 kt with gusts up to 20 kt. Waves
around 2 ft.

THU
NW winds around 10 kt. Gusts up to 20 kt in the morning.
Waves around 2 ft.

THU NIGHT THROUGH FRI NIGHT
W winds 5 to 10 kt. Waves around
2 ft.

SAT
NW winds 5 to 10 kt. Waves 1 foot or less.

SAT NIGHT THROUGH SUN NIGHT
NE winds 5 to 10 kt. Waves 1 foot
or less. 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.



ANZ236-291100-
Narragansett Bay-
642 PM EDT Tue Sep 28 2021

TONIGHT
NW winds 5 to 10 kt, becoming N 10 to 15 kt after
midnight. Gusts up to 25 kt. Waves around 2 ft. Showers likely
with a slight chance of tstms this evening, then a slight chance
of showers after midnight.

WED
N winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Gusts up to 25 kt. Waves around 2 ft.

WED NIGHT
N winds 5 to 10 kt with gusts up to 20 kt. Waves
around 2 ft.

THU
N winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Waves around 2 ft.

THU NIGHT THROUGH FRI NIGHT
NW winds 5 to 10 kt. Waves 1 foot
or less.

SAT
W winds 5 to 10 kt. Waves 1 foot or less.

SAT NIGHT THROUGH SUN NIGHT
NE winds 5 to 10 kt. Waves 1 foot
or less, except 2 to 4 ft at the bay entrance. 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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