National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 230517
CWFBOX

Coastal Waters Forecast for Massachusetts
National Weather Service Boston/Norton MA
116 AM EDT Mon Sep 23 2019

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

ANZ200-231800-
116 AM EDT Mon Sep 23 2019

Synopsis for Massachusetts and Rhode Island coastal waters

High pres remains SE of the waters through Mon. A cold front
approaches the waters Mon night, sweeping across the waters late
Tue afternoon. High pres area builds over the waters Wed, followed
by a cold front on Thu evening.   

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.

ANZ250-231800-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
116 AM EDT Mon Sep 23 2019

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT


REST OF TONIGHT
SW winds 15 to 20 kt with gusts up to 25 kt.
Seas around 5 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 15 to 20 kt, becoming S 20 to 25 kt in the
afternoon. Gusts up to 30 kt. Seas around 5 ft. Patchy fog in the
morning with vsby 1 NM or less.

MON NIGHT
SW winds 20 to 25 kt, diminishing to 10 to 15 kt
after midnight. Seas around 5 ft. Patchy dense fog in the
evening. Patchy fog after midnight. A chance of tstms. A chance
of showers in the evening, then showers likely after midnight.
Vsby 1 NM or less.

TUE
SW winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Seas 3 to 4 ft. Patchy fog in the morning. A chance of
showers in the morning with vsby 1 to 3 NM.

TUE NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 4 ft.

WED
NW winds 10 to 15 kt with gusts up to 20 kt, becoming W
5 to 10 kt in the afternoon. Seas around 4 ft.

WED NIGHT
SW winds 5 to 10 kt. Seas around 4 ft.

THU
SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 4 ft.

THU NIGHT
W winds 10 to 15 kt with gusts up to 20 kt. Seas
around 4 ft.

FRI
NW winds 10 to 15 kt with gusts up to 20 kt, becoming W
5 to 10 kt in the afternoon. Seas around 3 ft.

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

ANZ251-231800-
Massachusetts Bay and Ipswich Bay-
116 AM EDT Mon Sep 23 2019

REST OF TONIGHT
SW winds around 15 kt with gusts up to 20 kt.
Seas around 3 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 15 to 20 kt. Seas around 3 ft. Patchy fog in the
morning with vsby 1 NM or less.

MON NIGHT
SW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas around 4 ft. Showers likely with a chance of
tstms. Patchy fog after midnight with vsby 1 NM or less.

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

TUE NIGHT
NW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft.

WED
NW winds 10 to 15 kt with gusts up to 20 kt, becoming W
around 5 kt in the afternoon. Seas around 2 ft.

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

THU
SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 3 ft.

THU NIGHT
W winds around 10 kt. Seas 2 to 3 ft.

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

FRI NIGHT
W winds 5 to 10 kt. Seas around 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.

ANZ231-231800-
Cape Cod Bay-
116 AM EDT Mon Sep 23 2019

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING
THROUGH THIS EVENING...

REST OF TONIGHT
SW winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 15 to 20 kt with gusts up to 25 kt. Seas around
4 ft. Patchy fog in the morning with vsby 1 to 3 NM.

MON NIGHT
SW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas around 4 ft, subsiding to
2 ft after midnight. Patchy fog. A chance of showers in the
evening, then showers likely with a chance of tstms after
midnight with vsby 1 to 3 NM.

TUE
SW winds 5 to 10 kt. Seas 1 foot or less. Patchy fog in
the morning. A chance of showers in the morning with vsby 1 to
3 NM.

TUE NIGHT
NW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft.

WED
NW winds 10 to 15 kt with gusts up to 20 kt, becoming W
5 to 10 kt in the afternoon. Seas around 2 ft.

WED NIGHT
SW winds 5 to 10 kt. Seas 1 foot or less, then
around 2 ft after midnight.

THU
SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft.

THU NIGHT
W winds around 10 kt. Seas around 2 ft.

FRI
NW winds 5 to 10 kt. Seas around 2 ft in the morning, then
1 foot or less.

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

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.

ANZ254-231800-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
116 AM EDT Mon Sep 23 2019

SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON


REST OF TONIGHT
SW winds 15 to 20 kt with gusts up to 25 kt.
Seas around 5 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 15 to 20 kt with gusts up to 25 kt. Seas around
5 ft. Patchy fog in the morning with vsby 1 NM or less.

MON NIGHT
SW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas around 5 ft. Patchy fog.
A chance of showers in the evening. Showers likely with a chance
of tstms after midnight. Vsby 1 NM or less.

TUE
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
5 ft. Patchy fog in the morning. Showers likely with a chance of
tstms in the morning with vsby 1 NM or less.

TUE NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 5 ft.

WED
NW winds 10 to 15 kt with gusts up to 20 kt, becoming W
5 to 10 kt in the afternoon. Seas around 5 ft.

WED NIGHT
SW winds 5 to 10 kt. Seas around 5 ft.

THU
SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 5 ft.

THU NIGHT
W winds 10 to 15 kt, becoming NW after midnight.
Gusts up to 20 kt. Seas 4 to 5 ft.

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

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

ANZ255-231800-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
116 AM EDT Mon Sep 23 2019

SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON


REST OF TONIGHT
SW winds 15 to 20 kt with gusts up to 25 kt.
Seas around 5 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 15 to 20 kt with gusts up to 25 kt. Seas around
6 ft. Patchy fog in the morning with vsby 1 to 3 NM.

MON NIGHT
SW winds 15 to 20 kt with gusts up to 25 kt. Seas
around 6 ft. Patchy fog. A chance of showers in the evening, then
showers and tstms likely after midnight. Vsby 1 to 3 NM,
decreasing to 1 NM or less after midnight.

TUE
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
6 ft. Patchy fog in the morning. Showers likely with a chance of
tstms in the morning with vsby 1 NM or less.

TUE NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Seas
5 to 6 ft.

WED
W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas around 6 ft.

WED NIGHT
W winds around 10 kt. Seas around 5 ft.

THU
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
5 ft.

THU NIGHT
W winds 10 to 15 kt, becoming NW after midnight.
Gusts up to 20 kt. Seas 4 to 5 ft.

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

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

ANZ256-231800-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
116 AM EDT Mon Sep 23 2019

SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON


REST OF TONIGHT
SW winds around 15 kt with gusts up to 25 kt.
Seas around 5 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 15 to 20 kt with gusts up to 25 kt. Seas around
6 ft. Patchy fog in the morning with vsby 1 NM or less.

MON NIGHT
SW winds 15 to 20 kt with gusts up to 25 kt. Seas
around 6 ft. Patchy fog. A chance of showers in the evening, then
showers likely with a chance of tstms after midnight. Vsby 1 NM
or less.

TUE
W winds 10 to 15 kt with gusts up to 20 kt. Seas around
5 ft. A chance of showers in the morning with vsby 1 NM or less.

TUE NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 6 ft.

WED
W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas around 6 ft.

WED NIGHT
W winds 10 to 15 kt, becoming SW 5 to 10 kt after
midnight. Seas around 5 ft.

THU
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
5 ft.

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

FRI
NW winds 5 to 10 kt, becoming W in the afternoon. Seas
around 3 ft.

FRI NIGHT
W winds 5 to 10 kt. Seas around 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.

ANZ232-231800-
Nantucket Sound-
116 AM EDT Mon Sep 23 2019

SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING


REST OF TONIGHT
SW winds 15 to 20 kt with gusts up to 25 kt.
Seas around 3 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 15 to 20 kt with gusts up to 25 kt. Seas around
3 ft. Patchy fog in the morning with vsby 1 NM or less.

MON NIGHT
SW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas around 3 ft. Patchy fog.
A chance of showers in the evening, then showers with tstms
likely after midnight. Vsby 1 NM or less.

TUE
SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Gusts up to 20 kt. Seas 2 to 3 ft. Patchy fog in the
morning. Showers likely with a chance of tstms in the morning
with vsby 1 NM or less.

TUE NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 3 ft.

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

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

THU
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
3 ft.

THU NIGHT
W winds 10 to 15 kt, becoming NW 5 to 10 kt after
midnight. Gusts up to 20 kt. Seas around 2 ft.

FRI
NW winds 5 to 10 kt. Seas around 2 ft in the morning, then
1 foot or less.

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

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.

ANZ233-231800-
Vineyard Sound-
116 AM EDT Mon Sep 23 2019

SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING


REST OF TONIGHT
SW winds around 15 kt with gusts up to 20 kt.
Seas around 4 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 15 to 20 kt with gusts up to 25 kt. Seas around
4 ft. Patchy fog in the morning with vsby 1 NM or less.

MON NIGHT
SW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas around 4 ft. Patchy fog.
A chance of showers in the evening. Showers likely with a chance
of tstms after midnight. Vsby 1 to 3 NM.

TUE
SW winds 5 to 10 kt, becoming W 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 3 to 4 ft. Patchy fog in the
morning. A chance of showers in the morning with vsby 1 NM or
less.

TUE NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 3 ft.

WED
W winds 5 to 10 kt. Seas around 3 ft.

WED NIGHT
SW winds 5 to 10 kt. Seas around 3 ft.

THU
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
4 ft.

THU NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft.

FRI
NW winds 5 to 10 kt, becoming W in the afternoon. Seas
around 2 ft.

FRI NIGHT
W 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.

ANZ234-231800-
Buzzards Bay-
116 AM EDT Mon Sep 23 2019

SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING


REST OF TONIGHT
SW winds around 15 kt with gusts up to 20 kt.
Seas around 3 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 15 to 20 kt with gusts up to 30 kt. Seas around
4 ft. Patchy fog in the morning with vsby 1 NM or less.

MON NIGHT
SW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Patchy fog. A
chance of showers in the evening. Showers and tstms likely after
midnight. Vsby 1 to 3 NM.

TUE
W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas around 3 ft. A chance of showers
in the morning.

TUE NIGHT
W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW 5 to 10 kt after midnight. Seas around 3 ft.

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

WED NIGHT
SW winds 5 to 10 kt. Seas around 3 ft.

THU
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
3 ft.

THU NIGHT
W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW 5 to 10 kt after midnight. Seas 2 to 3 ft.

FRI
NW winds 5 to 10 kt, becoming W in the afternoon. Seas
around 2 ft in the morning, then 1 foot or less.

FRI NIGHT
W winds around 5 kt. Seas 1 foot or less, then
around 2 ft after midnight. 

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.

ANZ235-231800-
Rhode Island Sound-
116 AM EDT Mon Sep 23 2019

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING
THROUGH LATE TONIGHT...

REST OF TONIGHT
SW winds around 15 kt with gusts up to 25 kt.
Seas around 5 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 15 to 20 kt with gusts up to 25 kt. Seas around
5 ft. Patchy fog in the morning with vsby 1 NM or less.

MON NIGHT
SW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 5 to 6 ft. Patchy fog. A
chance of showers in the evening, then showers likely with a
chance of tstms after midnight. Vsby 1 to 3 NM, decreasing to
1 NM or less after midnight.

TUE
W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 4 to 5 ft. Patchy dense fog in the morning. A chance of
showers in the morning with vsby 1 NM or less.

TUE NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 5 ft.

WED
W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas around 5 ft.

WED NIGHT
SW winds around 10 kt. Seas around 5 ft.

THU
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
5 ft.

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

FRI
NW winds 5 to 10 kt, becoming W in the afternoon. Seas
2 to 3 ft.

FRI NIGHT
W 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.

ANZ237-231800-
Block Island Sound-
116 AM EDT Mon Sep 23 2019

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING
THROUGH LATE TONIGHT...

REST OF TONIGHT
SW winds around 15 kt with gusts up to 20 kt.
Seas around 4 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
5 ft. Patchy fog in the morning with vsby 1 NM or less.

MON NIGHT
SW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas around 5 ft. Patchy fog.
A chance of tstms. A chance of showers in the evening, then
showers likely after midnight. Vsby 1 NM or less.

TUE
W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas around 4 ft. A chance of
showers in the morning.

TUE NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 5 ft.

WED
W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas around 5 ft.

WED NIGHT
SW winds 5 to 10 kt. Seas around 5 ft.

THU
SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 4 to 5 ft.

THU NIGHT
W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW 5 to 10 kt after midnight. Seas 3 to 4 ft.

FRI
NW winds 5 to 10 kt, becoming W in the afternoon. Seas
2 to 3 ft.

FRI NIGHT
W winds around 5 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.

ANZ230-231800-
Boston Harbor-
116 AM EDT Mon Sep 23 2019

REST OF TONIGHT
SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.

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,
diminishing to 5 to 10 kt after midnight. Waves around 2 ft in
the evening, then 1 foot or less. Showers likely with a chance of
tstms.

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

TUE NIGHT
NW winds around 10 kt. Waves 1 foot or less.

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

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

THU
SW winds around 10 kt. Waves around 2 ft.

THU NIGHT
W winds around 10 kt. Waves 1 foot or less.

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

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

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.

ANZ236-231800-
Narragansett Bay-
116 AM EDT Mon Sep 23 2019

REST OF TONIGHT
SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 3 ft. Patchy fog. Vsby 1 NM or less.

MON
SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Waves around 4 ft. Patchy fog in
the morning with vsby 1 NM or less.

MON NIGHT
SW winds 10 to 15 kt with gusts up to 25 kt,
diminishing to 5 to 10 kt after midnight. Waves around 4 ft.
Showers likely with a chance of tstms. Patchy fog after midnight
with vsby 1 to 3 NM.

TUE
W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Waves 3 to 4 ft. A chance of
showers in the morning.

TUE NIGHT
NW winds 5 to 10 kt. Waves around 3 ft.

WED
W winds 5 to 10 kt. Waves 3 to 4 ft.

WED NIGHT
SW winds 5 to 10 kt. Waves 3 to 4 ft.

THU
SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Waves around 4 ft.

THU NIGHT
NW winds 5 to 10 kt. Waves around 3 ft.

FRI
NW winds 5 to 10 kt, becoming W in the afternoon. Waves
2 to 3 ft.

FRI NIGHT
W winds around 5 kt. Waves around 2 ft. 

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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