National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 170806
CWFBOX

Coastal Waters Forecast
National Weather Service Boston/Norton MA
406 AM EDT Wed Jul 17 2019

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

ANZ200-172030-
406 AM EDT Wed Jul 17 2019

Synopsis for Massachusetts and Rhode Island coastal waters

High pres will shift E of the waters today, while the remnants of
Barry spread across the waters late today through midday Thu.
High pres builds across northern New England on Thu producing
E-NE winds across the waters. The high will move E across Nova
Scotia Thu night. South to southwest winds will bring a build up
of heat and humidity Fri and Sat. A cold front approaches on
Sunday, bringing a chance for showers and thunderstorms.

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.

ANZ250-172030-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 10 to 15 kt, diminishing to 5 to 10 kt this
afternoon. Gusts up to 20 kt. Seas 2 to 4 ft. A slight chance of
tstms. A slight chance of showers this morning, then a chance of
showers this afternoon. Some tstms may produce gusty winds and
heavy rainfall. Vsby 1 to 3 NM this afternoon.

TONIGHT
W winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely
with a chance of tstms. Some tstms may produce gusty winds and
heavy rainfall. Vsby 1 to 3 NM.

THU
E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Showers likely with a chance of tstms. Some tstms may
produce heavy rainfall. Vsby 1 to 3 NM.

THU NIGHT
NE winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft. A chance of showers. Vsby 1 to 3 NM.

FRI
N winds around 5 kt, becoming S in the afternoon. Seas
around 2 ft.

FRI NIGHT
SW winds 10 to 15 kt. Seas 2 to 3 ft.

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

SAT NIGHT
W winds 5 to 10 kt. Seas 2 to 3 ft.

SUN
SW winds 5 to 10 kt. Seas 2 to 3 ft.

SUN NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft. 

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.

ANZ251-172030-
Massachusetts Bay and Ipswich Bay-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt this afternoon. Seas around 2 ft. A chance of
showers with a slight chance of tstms. Some tstms may produce
gusty winds and heavy rainfall. Vsby 1 to 3 NM this afternoon.

TONIGHT
SW winds 5 to 10 kt, becoming W after midnight. Seas
1 foot or less. Showers likely with a chance of tstms. Some tstms
may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM.

THU
NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Showers likely with a chance of tstms. Some tstms may
produce heavy rainfall.

THU NIGHT
NE winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. A
chance of showers. Vsby 1 to 3 NM.

FRI
N winds around 5 kt, becoming S in the afternoon. Seas
1 foot or less.

FRI NIGHT
SW winds 5 to 10 kt. Seas around 2 ft.

SAT
SW winds 5 to 10 kt. Seas 1 foot or less.

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

SUN
SW winds 5 to 10 kt. Seas 1 foot or less.

SUN NIGHT
S winds 5 to 10 kt. Seas 1 foot or less. Patchy fog.
A chance of showers. Vsby 1 to 3 NM. 

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.

ANZ231-172030-
Cape Cod Bay-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt this afternoon. Seas around 2 ft. A chance of
showers with a slight chance of tstms this afternoon. Some tstms
may produce gusty winds and heavy rainfall this afternoon.

TONIGHT
SW winds 5 to 10 kt. Seas 1 foot or less. Showers
likely with a chance of tstms. Some tstms may produce gusty winds
and heavy rainfall. Vsby 1 to 3 NM.

THU
E winds 5 to 10 kt. Seas 1 foot or less. Showers with a
chance of tstms. Some tstms may produce heavy rainfall. Vsby 1 to
3 NM.

THU NIGHT
NE winds 5 to 10 kt. Seas 1 foot or less. Patchy
fog. Showers likely with a chance of tstms. Some tstms may
produce heavy rainfall. Vsby 1 to 3 NM.

FRI
N winds around 5 kt, becoming SW in the afternoon. Seas
1 foot or less.

FRI NIGHT
SW winds 5 to 10 kt. Seas around 2 ft.

SAT
SW winds 5 to 10 kt. Seas 1 foot or less.

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

SUN
SW winds 5 to 10 kt. Seas around 2 ft.

SUN NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. 

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.

ANZ254-172030-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A slight chance of showers with isolated tstms this
afternoon. Some tstms may produce gusty winds and heavy rainfall
this afternoon.

TONIGHT
SW winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Seas 2 to 4 ft. Patchy fog. Showers likely with a chance of
tstms. Some tstms may produce gusty winds and heavy rainfall.
Vsby 1 NM or less.

THU
SE winds 5 to 10 kt. Seas 2 to 4 ft. Showers with a chance
of tstms. Some tstms may produce heavy rainfall. Vsby 1 NM or
less.

THU NIGHT
SE winds 5 to 10 kt, becoming N after midnight. Seas
2 to 4 ft. Patchy fog. Showers likely with a chance of tstms.
Some tstms may produce heavy rainfall. Vsby 1 to 3 NM.

FRI
N winds around 5 kt, becoming SW in the afternoon. Seas
2 to 4 ft. Patchy fog. Vsby 1 to 3 NM.

FRI NIGHT
SW winds 5 to 10 kt. Seas 2 to 4 ft.

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

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

SUN
W winds 5 to 10 kt. Seas 2 to 4 ft.

SUN NIGHT
SW winds 5 to 10 kt. Seas 2 to 4 ft. 

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.

ANZ255-172030-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.

TONIGHT
SW winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Patchy
fog. Showers likely with a chance of tstms. Some tstms may
produce gusty winds and heavy rainfall. Vsby 1 NM or less.

THU
S winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. Seas 2 to 4 ft. Showers with a chance of tstms. Some
tstms may produce heavy rainfall. Vsby 1 NM or less.

THU NIGHT
S winds 5 to 10 kt, becoming NW after midnight. Seas
2 to 4 ft. Patchy fog. Showers likely with a chance of tstms.
Some tstms may produce heavy rainfall. Vsby 1 to 3 NM.

FRI
NW winds around 5 kt, becoming SW in the afternoon. Seas
2 to 4 ft. Patchy fog. Vsby 1 to 3 NM.

FRI NIGHT
SW winds 5 to 10 kt. Seas 2 to 4 ft.

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

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

SUN
W winds 5 to 10 kt. Seas 2 to 4 ft.

SUN NIGHT
SW winds 5 to 10 kt. Seas 3 to 5 ft. 

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.

ANZ256-172030-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
3 ft. A slight chance of showers with isolated tstms this
afternoon. Some tstms may produce gusty winds and heavy rainfall
this afternoon.

TONIGHT
SW winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 3 to 4 ft. Showers
with a chance of tstms. Some tstms may produce gusty winds and
heavy rainfall. Vsby 1 to 3 NM.

THU
S winds around 5 kt, becoming SE in the afternoon. Seas
3 to 4 ft. Showers likely with a chance of tstms. Some tstms may
produce heavy rainfall. Vsby 1 to 3 NM.

THU NIGHT
NE winds 5 to 10 kt. Seas 2 to 4 ft. Showers likely
with a chance of tstms. Some tstms may produce heavy rainfall.
Vsby 1 to 3 NM.

FRI
NW winds around 5 kt, becoming SW in the afternoon. Seas
2 to 4 ft.

FRI NIGHT
SW winds around 10 kt. Seas 3 to 4 ft.

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

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

SUN
W winds 5 to 10 kt. Seas 3 to 4 ft.

SUN NIGHT
SW winds 5 to 10 kt. Seas 3 to 5 ft. 

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.

ANZ232-172030-
Nantucket Sound-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A slight chance of showers with isolated tstms this
afternoon. Some tstms may produce gusty winds and heavy rainfall
this afternoon.

TONIGHT
SW winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. Showers with a chance of tstms. Some tstms may
produce gusty winds and heavy rainfall. Vsby 1 to 3 NM.

THU
SE winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Showers with a chance of tstms. Some
tstms may produce heavy rainfall. Vsby 1 to 3 NM.

THU NIGHT
E winds 5 to 10 kt, becoming N after midnight. Seas
around 2 ft. Patchy fog. Showers likely with a chance of tstms.
Some tstms may produce heavy rainfall. Vsby 1 to 3 NM.

FRI
N winds around 5 kt, becoming SW in the afternoon. Seas
around 2 ft. Patchy fog. Vsby 1 to 3 NM.

FRI NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft.

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

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

SUN
SW winds 5 to 10 kt. Seas 2 to 3 ft.

SUN NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. 

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.

ANZ233-172030-
Vineyard Sound-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A slight chance of showers with isolated tstms this
afternoon. Some tstms may produce gusty winds and heavy rainfall
this afternoon.

TONIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. Showers with a
chance of tstms. Some tstms may produce gusty winds and heavy
rainfall. Vsby 1 NM or less.

THU
SE winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. Seas around 2 ft. Showers with a chance of tstms. Some
tstms may produce heavy rainfall. Vsby 1 to 3 NM.

THU NIGHT
N winds 5 to 10 kt. Seas around 2 ft. Patchy fog.
Showers likely with a chance of tstms. Some tstms may produce
heavy rainfall. Vsby 1 to 3 NM.

FRI
NW winds around 5 kt, becoming SW in the afternoon. Seas
around 2 ft. Patchy fog. Vsby 1 to 3 NM.

FRI NIGHT
SW winds 5 to 10 kt. Seas around 2 ft.

SAT
SW winds 10 to 15 kt. Seas 2 to 3 ft.

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

SUN
W winds 5 to 10 kt. Seas 2 to 3 ft.

SUN NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. 

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.

ANZ234-172030-
Buzzards Bay-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A slight chance of showers with isolated tstms this
afternoon. Some tstms may produce gusty winds and heavy rainfall
this afternoon.

TONIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. Showers with a
chance of tstms. Some tstms may produce gusty winds and heavy
rainfall. Vsby 1 to 3 NM.

THU
SE winds around 5 kt, becoming E in the afternoon. Seas
around 2 ft. Showers with a chance of tstms. Some tstms may
produce heavy rainfall. Vsby 1 to 3 NM.

THU NIGHT
NE winds 5 to 10 kt, becoming N after midnight. Seas
around 2 ft. Patchy fog. Showers likely with a chance of tstms.
Some tstms may produce heavy rainfall. Vsby 1 to 3 NM.

FRI
NW winds around 5 kt, becoming SW in the afternoon. Seas
around 2 ft. Patchy fog. Vsby 1 to 3 NM.

FRI NIGHT
SW winds 5 to 10 kt. Seas around 2 ft.

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

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

SUN
W winds 5 to 10 kt. Seas around 2 ft.

SUN NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. 

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.

ANZ235-172030-
Rhode Island Sound-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A slight chance of showers with isolated tstms this
afternoon. Some tstms may produce gusty winds and heavy rainfall
this afternoon.

TONIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. Showers with a
chance of tstms. Some tstms may produce gusty winds and heavy
rainfall. Vsby 1 to 3 NM.

THU
SE winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Showers with a chance of tstms. Some
tstms may produce heavy rainfall. Vsby 1 to 3 NM.

THU NIGHT
N winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog.
Showers likely with a chance of tstms. Some tstms may produce
heavy rainfall. Vsby 1 to 3 NM.

FRI
NW winds around 5 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Patchy fog. Vsby 1 to 3 NM.

FRI NIGHT
SW winds 5 to 10 kt. Seas 2 to 4 ft.

SAT
SW winds 10 to 15 kt. Seas 2 to 4 ft.

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

SUN
W winds 5 to 10 kt. Seas 2 to 4 ft.

SUN NIGHT
SW winds 5 to 10 kt. Seas 2 to 4 ft. 

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.

ANZ237-172030-
Block Island Sound-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 5 to 10 kt, increasing to 10 to 15 kt this
afternoon. Gusts up to 20 kt. Seas 2 to 3 ft. A slight chance of
showers with isolated tstms this afternoon. Some tstms may
produce gusty winds and heavy rainfall this afternoon.

TONIGHT
SW winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. Showers with a chance of tstms. Some tstms may
produce gusty winds and heavy rainfall. Vsby 1 to 3 NM.

THU
SE winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Showers with a chance of tstms. Some
tstms may produce heavy rainfall. Vsby 1 to 3 NM.

THU NIGHT
NE winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog.
Showers likely with a chance of tstms. Some tstms may produce
heavy rainfall. Vsby 1 to 3 NM.

FRI
NW winds around 5 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Patchy fog. Vsby 1 to 3 NM.

FRI NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft.

SAT
SW winds 10 to 15 kt. Seas 2 to 4 ft.

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

SUN
W winds 5 to 10 kt. Seas 2 to 4 ft.

SUN NIGHT
SW winds 5 to 10 kt. Seas 2 to 4 ft. 

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.

ANZ230-172030-
Boston Harbor-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 5 to 10 kt. Waves 1 foot or less. A chance of
showers with a slight chance of tstms this morning, then showers
likely with scattered tstms this afternoon. Some tstms may
produce gusty winds and heavy rainfall. Vsby 1 to 3 NM this
afternoon.

TONIGHT
NW winds around 5 kt. Waves 1 foot or less. Showers
likely with a chance of tstms. Some tstms may produce gusty winds
and heavy rainfall. Vsby 1 to 3 NM.

THU
NE winds 5 to 10 kt. Waves around 2 ft. Showers likely
with a chance of tstms. Some tstms may produce heavy rainfall.

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

FRI
N winds around 5 kt, becoming S around 5 kt in the
afternoon. Waves 1 foot or less.

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

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

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

SUN
SW winds around 5 kt. Waves 1 foot or less.

SUN NIGHT
SW winds around 5 kt. Waves 1 foot or less. A chance
of showers. Vsby 1 to 3 NM. 

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.

ANZ236-172030-
Narragansett Bay-
406 AM EDT Wed Jul 17 2019

TODAY
SW winds 5 to 10 kt. Gusts up to 20 kt this morning.
Waves around 2 ft. A chance of showers with a slight chance of
tstms this afternoon. Some tstms may produce gusty winds and
heavy rainfall this afternoon.

TONIGHT
SW winds 5 to 10 kt, diminishing to around 5 kt after
midnight. Waves around 2 ft. Showers with a chance of tstms. Some
tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM.

THU
E winds around 5 kt, becoming NE in the afternoon. Waves
around 2 ft. Showers with a chance of tstms. Some tstms may
produce heavy rainfall. Vsby 1 to 3 NM.

THU NIGHT
N winds around 5 kt. Waves around 2 ft. Patchy fog.
A chance of showers. Vsby 1 to 3 NM.

FRI
NW winds around 5 kt, becoming SW in the afternoon. Waves
around 2 ft. Patchy fog. Vsby 1 to 3 NM.

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

SAT
SW winds 5 to 10 kt. Waves around 2 ft.

SAT NIGHT
W winds 5 to 10 kt. Waves around 2 ft.

SUN
W winds 5 to 10 kt. Waves around 2 ft.

SUN NIGHT
SW winds around 5 kt. Waves around 2 ft. Patchy fog.
Vsby 1 to 3 NM. 

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.

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
www.facebook.com/us.nationalweatherservice.boston.gov

You can follow us on Twitter at
@NWSBoston