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National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 241127
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
727 AM EDT Thu Jun 24 2021

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

ANZ200-250000-
727 AM EDT Thu Jun 24 2021

Synopsis for Massachusetts and Rhode Island coastal waters

High pressure builds south of Nova Scotia today. Weak low pressure
off the Mid Atlantic coast drifts north tonight and then across
southeast New England early Fri, before lifting northeast into the
Gulf of Maine and dissipating later Fri. Thereafter, high pressure
south of Newfoundland and low pressure tracking across the Great
Lakes, yields a persistent SSW flow across the MA and RI waters this
weekend. This weather pattern likely lingers into early next week.

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



ANZ250-250000-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
727 AM EDT Thu Jun 24 2021

TODAY
S winds around 5 kt, becoming SE with gusts up to 20 kt
this afternoon. Seas 2 to 3 ft.

TONIGHT
SE winds around 10 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of showers.

FRI
SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less.

FRI NIGHT
S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft.

SAT
S winds 10 to 15 kt, increasing to 15 to 20 kt with gusts
up to 25 kt in the afternoon. Seas 2 to 4 ft.

SAT NIGHT
S winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft.

SUN AND SUN NIGHT
SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 5 ft.

MON AND MON NIGHT
SW winds 15 to 20 kt. Seas 3 to 5 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.



ANZ251-250000-
Massachusetts Bay and Ipswich Bay-
727 AM EDT Thu Jun 24 2021

TODAY
SE winds around 5 kt, increasing to 5 to 10 kt with
gusts up to 20 kt this afternoon. Seas 2 to 3 ft.

TONIGHT
E winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. A chance of showers.

FRI
E winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. A chance
of showers. Vsby 1 NM or less.

FRI NIGHT
S winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft.

SAT AND SAT NIGHT
S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.

SUN AND SUN NIGHT
SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft.

MON
SW winds around 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of showers.

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



ANZ231-250000-
Cape Cod Bay-
727 AM EDT Thu Jun 24 2021

TODAY
SE winds 5 to 10 kt. Gusts up to 20 kt this afternoon.
Seas around 2 ft.

TONIGHT
SE winds 5 to 10 kt with gusts up to 20 kt. Seas
around 2 ft. Patchy fog. A chance of showers.

FRI
SE winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Gusts up to 20 kt. Seas around 2 ft. Patchy fog. A
chance of showers. Vsby 1 to 3 NM.

FRI NIGHT
S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft.

SAT AND SAT NIGHT
S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.

SUN THROUGH MON
SW winds 15 to 20 kt. Seas 2 to 3 ft.

MON NIGHT
SW winds 15 to 20 kt. Seas 2 to 3 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.



ANZ254-250000-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
727 AM EDT Thu Jun 24 2021

TODAY
SE winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to
4 ft.

TONIGHT
SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less.

FRI
S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less.

FRI NIGHT
S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 4 ft. Patchy fog. Vsby 1 NM or less.

SAT AND SAT NIGHT
S winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 4 ft.

SUN THROUGH MON
SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 5 ft.

MON NIGHT
SW winds 15 to 20 kt. Seas 4 to 5 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.



ANZ255-250000-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
727 AM EDT Thu Jun 24 2021

TODAY
E winds 5 to 10 kt, increasing to 10 to 15 kt this
afternoon. Gusts up to 20 kt. Seas 3 to 4 ft. A slight chance of
showers this afternoon.

TONIGHT
E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less.

FRI
S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less.

FRI NIGHT
S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 4 ft. Patchy fog. Vsby 1 NM or less.

SAT AND SAT NIGHT
S winds 10 to 15 kt. Seas 2 to 4 ft.

SUN THROUGH MON NIGHT
SW winds around 15 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.



ANZ256-250000-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
727 AM EDT Thu Jun 24 2021

TODAY
E winds 5 to 10 kt, increasing to 10 to 15 kt this
afternoon. Gusts up to 20 kt. Seas 3 to 4 ft. A slight chance of
showers this afternoon.

TONIGHT
E winds 10 to 15 kt with gusts up to 20 kt. Seas
around 4 ft. A chance of showers.

FRI
S winds 10 to 15 kt with gusts up to 20 kt. Seas around
4 ft. Patchy fog. Vsby 1 NM or less.

FRI NIGHT
S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 4 ft.

SAT AND SAT NIGHT
S winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 4 ft.

SUN THROUGH MON NIGHT
SW winds around 15 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.



ANZ232-250000-
Nantucket Sound-
727 AM EDT Thu Jun 24 2021

TODAY
SE winds 5 to 10 kt. Gusts up to 20 kt this afternoon.
Seas around 2 ft.

TONIGHT
E winds around 10 kt with gusts up to 20 kt. Seas
around 2 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.

FRI
S winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Patchy fog. A chance of showers. Vsby 1 NM or less.

FRI NIGHT
S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft.

SAT AND SAT NIGHT
S winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft.

SUN THROUGH MON
SW winds around 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.

MON NIGHT
SW winds around 15 kt with gusts up to 20 kt. Seas
2 to 3 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.



ANZ233-250000-
Vineyard Sound-
727 AM EDT Thu Jun 24 2021

TODAY
SE winds 5 to 10 kt. Gusts up to 20 kt this afternoon.
Seas around 2 ft.

TONIGHT
E winds 5 to 10 kt with gusts up to 20 kt. Seas around
2 ft. Patchy fog. A chance of showers.

FRI
SE winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Gusts up to 20 kt. Seas 2 to 3 ft. Patchy fog. A
chance of showers. Vsby 1 to 3 NM.

FRI NIGHT
S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft.

SAT AND SAT NIGHT
SW winds 10 to 15 kt. Seas around 2 ft.

SUN THROUGH MON
SW winds around 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.

MON NIGHT
SW winds around 15 kt with gusts up to 20 kt. Seas
2 to 3 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.



ANZ234-250000-
Buzzards Bay-
727 AM EDT Thu Jun 24 2021

TODAY
SE winds 5 to 10 kt. Gusts up to 20 kt this afternoon.
Seas around 2 ft.

TONIGHT
E winds 5 to 10 kt with gusts up to 20 kt. Seas around
2 ft. Patchy fog. A chance of showers.

FRI
SE winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Gusts up to 20 kt. Seas around 2 ft. Patchy fog. A
chance of showers. Vsby 1 to 3 NM.

FRI NIGHT
SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft.

SAT AND SAT NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.

SUN THROUGH MON
SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft.

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



ANZ235-250000-
Rhode Island Sound-
727 AM EDT Thu Jun 24 2021

TODAY
SE winds 5 to 10 kt, becoming E 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 2 to 4 ft.

TONIGHT
E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. A chance of showers.

FRI
SE winds around 10 kt, becoming S in the afternoon. Gusts
up to 20 kt. Seas 3 to 4 ft. Patchy fog. A chance of showers.
Vsby 1 to 3 NM.

FRI NIGHT
S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft.

SAT AND SAT NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft.

SUN THROUGH MON
SW winds around 15 kt with gusts up to 20 kt.
Seas 3 to 4 ft.

MON NIGHT
SW winds around 15 kt with gusts up to 20 kt. Seas
3 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.



ANZ237-250000-
Block Island Sound-
727 AM EDT Thu Jun 24 2021

TODAY
E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 2 to 4 ft.

TONIGHT
E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. A chance of showers.

FRI
SE winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. A
chance of showers. Vsby 1 to 3 NM.

FRI NIGHT
S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft.

SAT
S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. A chance of showers.

SAT NIGHT
S winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft.

SUN THROUGH MON
SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 4 ft.

MON NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 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.



ANZ230-250000-
Boston Harbor-
727 AM EDT Thu Jun 24 2021

TODAY
SE winds around 5 kt, increasing to around 10 kt with
gusts up to 20 kt this afternoon. Waves around 2 ft.

TONIGHT
SE winds 5 to 10 kt with gusts up to 20 kt, becoming E
after midnight. Waves around 2 ft. A chance of showers.

FRI
E winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. A
chance of showers. Vsby 1 to 3 NM.

FRI NIGHT
S winds 5 to 10 kt. Waves around 2 ft.

SAT AND SAT NIGHT
S winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.

SUN AND SUN NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.

MON
SW winds 10 to 15 kt. Waves 1 foot or less. A chance of
showers.

MON NIGHT
SW winds 10 to 15 kt. Waves around 2 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.



ANZ236-250000-
Narragansett Bay-
727 AM EDT Thu Jun 24 2021

TODAY
SE winds 5 to 10 kt. Gusts up to 20 kt this afternoon.
Waves 2 to 3 ft.

TONIGHT
E winds 5 to 10 kt with gusts up to 20 kt. Waves 2 to
3 ft. A chance of showers.

FRI
E winds 5 to 10 kt, becoming S in the afternoon. Gusts up
to 20 kt. Waves 2 to 3 ft. Patchy fog. A chance of showers. Vsby
1 to 3 NM.

FRI NIGHT
S winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Waves 2 to 3 ft.

SAT AND SAT NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt.
Waves 1 foot or less, except 2 to 4 ft at the bay entrance.

SUN THROUGH MON
SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.

MON NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt. Waves
around 2 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.



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