Coastal Waters Forecast
Issued by NWS Boston, MA

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

000
FZUS51 KBOX 211436
CWFBOX

Coastal Waters Forecast
National Weather Service Boston/Norton MA
1036 AM EDT Sun Oct 21 2018

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

ANZ200-220330-
1036 AM EDT Sun Oct 21 2018

.Synopsis for Massachusetts and Rhode Island coastal waters...
Low pres will push E of Cape Cod this afternoon with gale force
NW wind gusts. A high pres ridge will build south of the waters
Mon. Low pres will then track across northern New England Tue,
dragging a cold front across the waters Tue night. High pres will
build E from the Great Lakes Wed and Thu.

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.

$$

ANZ250-220330-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1036 AM EDT Sun Oct 21 2018

...GALE WARNING IN EFFECT UNTIL 10 PM EDT THIS EVENING...

.THIS AFTERNOON...NW winds 25 to 30 kt with gusts up to 35 kt.
Seas 7 to 8 ft. Showers likely. Vsby 1 to 3 NM.
.TONIGHT...NW winds 25 to 30 kt, diminishing to 20 to 25 kt after
midnight. Gusts to 35 kt this evening. Seas 6 to 8 ft.
.MON...NW winds 15 to 20 kt, becoming W 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas around 6 ft, subsiding to 4 ft
in the afternoon.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas around 3 ft. A
chance of showers after midnight.
.TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
4 to 5 ft. A chance of showers.
.WED...NW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 4 to 5 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 5 ft.
.THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
6 ft.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
5 to 6 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.

$$

ANZ251-220330-
Massachusetts Bay and Ipswich Bay-
1036 AM EDT Sun Oct 21 2018

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.THIS AFTERNOON...NW winds 20 to 25 kt, increasing to 25 to
30 kt. Gusts to 35 kt. Seas around 5 ft. A chance of showers.
.TONIGHT...NW winds 25 to 30 kt, diminishing to 15 to 20 kt after
midnight. Seas 4 to 5 ft.
.MON...W winds 15 to 20 kt, diminishing to 5 to 10 kt in the
afternoon. Gusts up to 25 kt. Seas 3 to 4 ft.
.MON NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. A chance of showers after midnight.
.TUE...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft. A chance of showers in the evening.
.WED...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around
3 ft.
.WED NIGHT...NW winds 10 to 15 kt with gusts up to 30 kt. Seas
around 3 ft.
.THU...NW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas around 3 ft.
.THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas around 3 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.

$$

ANZ231-220330-
Cape Cod Bay-
1036 AM EDT Sun Oct 21 2018

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.THIS AFTERNOON...NW winds 25 to 30 kt with gusts up to 40 kt.
Seas 5 to 6 ft. Showers through midday. Vsby 1 to 3 NM.
.TONIGHT...NW winds 25 to 30 kt, diminishing to 20 to 25 kt after
midnight. Seas 5 to 6 ft.
.MON...W winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Gusts up to 20 kt. Seas 3 to 4 ft.
.MON NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft in the evening, then 1 foot or less. A
chance of showers after midnight.
.TUE...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Seas 1 foot or less, then around 2 ft in the afternoon. A chance
of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
around 3 ft. A chance of showers in the evening.
.WED...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around
3 ft.
.WED NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 30 kt. Seas around 3 ft.
.THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around
4 ft.
.THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 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.

$$

ANZ254-220330-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1036 AM EDT Sun Oct 21 2018

...GALE WARNING IN EFFECT UNTIL 10 PM EDT THIS EVENING...

.THIS AFTERNOON...N winds 25 to 35 kt with gusts up to 45 kt.
Seas 7 to 10 ft. Showers. Vsby 1 NM or less, increasing to 1 to 3
NM.
.TONIGHT...NW winds 25 to 30 kt, diminishing to 20 to 25 kt after
midnight. Gusts up to 30 kt after midnight. Seas 8 to 9 ft.
.MON...NW winds 15 to 20 kt, becoming W 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 5 to 6 ft.
.MON NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas around 3 ft. A chance of showers after midnight.
.TUE...S winds 5 to 10 kt, becoming SW 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 3 to 4 ft. A chance of
showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
around 5 ft. A chance of showers.
.WED...NW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas around 5 ft. A chance of
showers.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
5 to 6 ft. A chance of showers.
.THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around
6 ft.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
around 6 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.

$$

ANZ255-220330-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1036 AM EDT Sun Oct 21 2018

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.THIS AFTERNOON...NW winds 25 to 35 kt with gusts up to 45 kt.
Seas 6 to 7 ft. Showers. Isolated tstms. Vsby 1 NM or less,
increasing to 1 to 3 NM.
.TONIGHT...NW winds 25 to 30 kt, diminishing to 20 to 25 kt after
midnight. Seas 6 to 7 ft.
.MON...NW winds 15 to 20 kt, becoming W 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 4 to 5 ft.
.MON NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Gusts up to 25 kt. Seas around 3 ft. A chance of
showers after midnight.
.TUE...SW winds 10 to 15 kt with gusts up to 30 kt. Seas around
3 ft, building to 6 ft in the afternoon. A chance of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 30 kt. Seas
around 7 ft.
.WED...NW winds around 15 kt with gusts up to 25 kt. Seas 5 to
6 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
around 5 ft.
.THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around
5 ft.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 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.

$$

ANZ256-220330-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1036 AM EDT Sun Oct 21 2018

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.THIS AFTERNOON...NW winds 25 to 30 kt with gusts up to 40 kt.
Seas around 7 ft. Showers likely. Vsby 1 to 3 NM.
.TONIGHT...NW winds 25 to 30 kt, diminishing to 20 to 25 kt after
midnight. Seas 6 to 7 ft.
.MON...NW winds 15 to 20 kt, becoming W 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 3 to 4 ft.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas
around 3 ft.
.TUE...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas around 4 ft, building to 6 ft
in the afternoon. A chance of showers.
.TUE NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
6 to 7 ft.
.WED...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around
5 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 5 ft.
.THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around
4 ft.
.THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 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.

$$

ANZ232-220330-
Nantucket Sound-
1036 AM EDT Sun Oct 21 2018

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.THIS AFTERNOON...NW winds 25 to 30 kt with gusts up to 40 kt.
Seas around 6 ft. Showers. Vsby 1 to 3 NM.
.TONIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after
midnight. Gusts up to 30 kt. Seas around 5 ft, subsiding to 3 ft
after midnight.
.MON...NW winds 15 to 20 kt, becoming W 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas around 3 ft.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. A
chance of showers after midnight.
.TUE...SW winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to
3 ft. A chance of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 4 ft. A chance of showers in the evening.
.WED...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around
3 ft.
.WED NIGHT...NW winds around 15 kt with gusts up to 25 kt. Seas
around 3 ft.
.THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around
3 ft.
.THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas around 3 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.

$$

ANZ233-220330-
Vineyard Sound-
1036 AM EDT Sun Oct 21 2018

...GALE WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.THIS AFTERNOON...NW winds 25 to 30 kt with gusts up to 40 kt.
Seas around 4 ft. Showers. Vsby 1 to 3 NM.
.TONIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after
midnight. Gusts up to 30 kt. Seas around 3 ft.
.MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas around
3 ft.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. A
chance of showers after midnight.
.TUE...SW winds 10 to 15 kt with gusts up to 30 kt. Seas around
4 ft. A chance of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 4 ft.
.WED...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft.
.WED NIGHT...NW winds around 15 kt with gusts up to 30 kt. Seas
around 3 ft.
.THU...NW winds around 15 kt with gusts up to 30 kt. Seas 2 to
3 ft.
.THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 2 to 3 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.

$$

ANZ234-220330-
Buzzards Bay-
1036 AM EDT Sun Oct 21 2018

...GALE WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.THIS AFTERNOON...N winds 25 to 35 kt, becoming NW 20 to 25 kt.
Seas around 4 ft. Showers. Vsby 1 to 3 NM.
.TONIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after
midnight. Gusts up to 30 kt. Seas around 3 ft.
.MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas around
3 ft.
.MON NIGHT...SW winds 5 to 10 kt. Gusts up to 25 kt in the
evening. Seas 2 to 3 ft. A chance of showers after midnight.
.TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas around 2 ft, building to 4 ft
in the afternoon. A chance of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft.
.WED...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around
2 ft.
.WED NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
around 3 ft.
.THU...NW winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to
3 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
around 2 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.

$$

ANZ235-220330-
Rhode Island Sound-
1036 AM EDT Sun Oct 21 2018

...GALE WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.THIS AFTERNOON...NW winds 25 to 30 kt with gusts up to 40 kt.
Seas around 5 ft. Showers likely. Vsby 1 to 3 NM.
.TONIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after
midnight. Gusts up to 30 kt. Seas 4 to 5 ft.
.MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas around
3 ft.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft. A chance of showers after midnight.
.TUE...SW winds 10 to 15 kt with gusts up to 30 kt. Seas around
3 ft, building to 5 ft in the afternoon. A chance of showers.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
4 to 5 ft.
.WED...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
4 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas
around 3 ft.
.THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
3 ft.
.THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 2 to 3 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.

$$

ANZ237-220330-
Block Island Sound-
1036 AM EDT Sun Oct 21 2018

...GALE WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.THIS AFTERNOON...NW winds 25 to 30 kt with gusts up to 35 kt.
Seas around 5 ft. A chance of showers.
.TONIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after
midnight. Gusts up to 30 kt. Seas 4 to 5 ft.
.MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas around
2 ft.
.MON NIGHT...SW winds 5 to 10 kt with gusts up to 25 kt. Seas
around 2 ft.
.TUE...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
4 ft. A chance of showers in the morning.
.TUE NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
4 to 5 ft.
.WED...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around
3 ft.
.WED NIGHT...NW winds 10 to 15 kt with gusts up to 30 kt. Seas
around 3 ft.
.THU...NW winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to
3 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
around 2 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.

$$

ANZ230-220330-
Boston Harbor-
1036 AM EDT Sun Oct 21 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...NW winds 20 to 25 kt with gusts up to 30 kt.
Waves around 2 ft. A slight chance of showers.
.TONIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Gusts up to 30 kt. Waves around 2 ft.
.MON...W winds 5 to 10 kt with gusts up to 20 kt. Waves around
2 ft.
.MON NIGHT...SW winds 5 to 10 kt. Waves around 2 ft in the
evening, then 1 foot or less. A chance of showers after midnight.
.TUE...S winds around 5 kt. Waves 1 foot or less. A chance of
showers.
.TUE NIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Waves
1 foot or less, then around 2 ft after midnight. A chance of
showers in the evening.
.WED...NW winds around 10 kt with gusts up to 25 kt. Waves around
2 ft.
.WED NIGHT...NW winds around 10 kt with gusts up to 25 kt. Waves
around 2 ft.
.THU...NW winds around 10 kt with gusts up to 25 kt. Waves around
2 ft.
.THU NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Waves around 2 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.

$$

ANZ236-220330-
Narragansett Bay-
1036 AM EDT Sun Oct 21 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...NW winds 20 to 25 kt with gusts up to 30 kt.
Waves around 3 ft. A chance of showers.
.TONIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Waves 2 to 3 ft.
.MON...W winds 5 to 10 kt with gusts up to 25 kt. Waves 1 foot or
less, then around 2 ft in the afternoon.
.MON NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft. A chance of showers after midnight.
.TUE...SW winds 5 to 10 kt with gusts up to 20 kt. Waves 2 to
3 ft. A chance of showers.
.TUE NIGHT...W winds 5 to 10 kt with gusts up to 25 kt. Waves
2 to 3 ft.
.WED...NW winds 10 to 15 kt with gusts up to 25 kt. Waves around
2 ft.
.WED NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves
around 3 ft.
.THU...NW winds 10 to 15 kt. Gusts up to 30 kt. Waves 2 to 3 ft.
.THU NIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Gusts up to 20 kt. Waves around 2 ft in the
evening, then 1 foot or less.

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/NWSBoston

You can follow us on Twitter at
@NWSBoston


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.