Coastal Waters Forecast
Issued by NWS Boston, MA

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
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 241416
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1016 AM EDT Sat Oct 24 2020

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

ANZ200-250300-
1016 AM EDT Sat Oct 24 2020

.Synopsis for Massachusetts and Rhode Island coastal waters...
A cold front will cross the waters this afternoon. High pres will
build over New England tonight and Sunday. Low pres over the eastern
Great Lakes Mon will push another cold front through the region Tue.
High pres builds over the waters Wed before yet another cold front
approaches Thu.

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

$$

ANZ250-250300-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1016 AM EDT Sat Oct 24 2020

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...

.THIS AFTERNOON...SW winds 5 to 10 kt. Seas 5 to 8 ft.
.TONIGHT...N winds 15 to 20 kt with gusts up to 30 kt. Seas 7 to
10 ft.
.SUN...N winds 15 to 20 kt, becoming NE 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 6 to 9 ft.
.SUN NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 4 to 5 ft.
.MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
5 ft. A chance of showers.
.MON NIGHT...S winds around 10 kt, becoming W with gusts up to
20 kt after midnight. Seas 4 to 5 ft. A chance of showers.
.TUE AND TUE NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Seas
3 to 5 ft. Showers likely.
.WED...NE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers.
.WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ251-250300-
Massachusetts Bay and Ipswich Bay-
1016 AM EDT Sat Oct 24 2020

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...SW winds 5 to 10 kt. Seas 4 to 6 ft. A slight
chance of showers.
.TONIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
7 ft.
.SUN...N winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
7 ft.
.SUN NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 4 to 5 ft.
.MON...SE winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 3 to 5 ft. A chance of showers.
.MON NIGHT...S winds 5 to 10 kt, becoming W 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 2 to 4 ft. A chance of
showers.
.TUE AND TUE NIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt. Seas 2 to 4 ft. Showers likely.
.WED...N winds 5 to 10 kt. Seas around 3 ft. A chance of showers.
.WED NIGHT...SW winds 5 to 10 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.

$$

ANZ231-250300-
Cape Cod Bay-
1016 AM EDT Sat Oct 24 2020

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...

.THIS AFTERNOON...SW winds 5 to 10 kt. Seas 1 foot or less.
.TONIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft.
.SUN...N winds 15 to 20 kt, becoming NE 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.
.SUN NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft. A chance of showers.
.MON...E winds 10 to 15 kt, becoming SE 5 to 10 kt in the
afternoon. Gusts up to 20 kt. Seas 2 to 3 ft. A chance of
showers.
.MON NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
2 to 3 ft. A chance of showers.
.TUE AND TUE NIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
becoming NE 5 to 10 kt. Seas 2 to 3 ft. Showers likely.
.WED...NE winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers.
.WED NIGHT...SW winds 5 to 10 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.

$$

ANZ254-250300-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1016 AM EDT Sat Oct 24 2020

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...

.THIS AFTERNOON...W winds 5 to 10 kt. Gusts up to 20 kt. Seas
6 to 9 ft.
.TONIGHT...NW winds 15 to 20 kt, becoming N after midnight. Gusts
up to 30 kt. Seas 7 to 10 ft.
.SUN...N winds 15 to 20 kt, becoming NE 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 6 to 9 ft.
.SUN NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
around 5 ft. A chance of showers.
.MON...E winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
5 ft. A chance of showers.
.MON NIGHT...S winds around 10 kt, becoming SW after midnight.
Seas 4 to 5 ft. A chance of showers.
.TUE AND TUE NIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
becoming NE. Seas 3 to 5 ft. Showers likely.
.WED...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
5 ft. A chance of showers.
.WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
4 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.

$$

ANZ255-250300-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1016 AM EDT Sat Oct 24 2020

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...

.THIS AFTERNOON...W winds around 5 kt, increasing to 10 to 15 kt
with gusts up to 20 kt. Seas 6 to 9 ft.
.TONIGHT...NW winds 10 to 15 kt, becoming N 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 5 to 8 ft.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
7 ft.
.SUN NIGHT...E winds around 15 kt with gusts up to 25 kt. Seas
3 to 5 ft. A chance of showers.
.MON...E winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft. A chance of showers.
.MON NIGHT...SE winds 5 to 10 kt, becoming SW 10 to 15 kt after
midnight. Seas 3 to 4 ft. A chance of showers.
.TUE AND TUE NIGHT...NW winds around 10 kt, becoming N. Seas 3 to
4 ft. Showers likely.
.WED AND WED NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
becoming W 5 to 10 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.

$$

ANZ256-250300-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1016 AM EDT Sat Oct 24 2020

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...

.THIS AFTERNOON...SW winds 5 to 10 kt, becoming W 10 to 15 kt
with gusts up to 20 kt. Seas 6 to 7 ft.
.TONIGHT...NW winds 10 to 15 kt, becoming N 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 5 to 7 ft.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft.
.SUN NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft. A chance of showers.
.MON...E winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 4 to 6 ft. A chance of
showers.
.MON NIGHT...S winds around 10 kt, becoming SW with gusts up to
20 kt after midnight. Seas 4 to 5 ft. A chance of showers.
.TUE AND TUE NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Seas
3 to 4 ft. Showers likely.
.WED AND WED NIGHT...N winds 10 to 15 kt, becoming W 5 to 10 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.

$$

ANZ232-250300-
Nantucket Sound-
1016 AM EDT Sat Oct 24 2020

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...

.THIS AFTERNOON...SW winds around 5 kt, increasing to 10 to 15 kt
with gusts up to 20 kt. Seas 2 to 3 ft.
.TONIGHT...NW winds 10 to 15 kt, becoming N 15 to 20 kt after
midnight. Gusts up to 30 kt. Seas 2 to 4 ft.
.SUN...N winds 15 to 20 kt, becoming NE 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.
.SUN NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of showers.
.MON...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers.
.MON NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
2 to 3 ft. A chance of showers.
.TUE AND TUE NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Seas
2 to 3 ft. Showers likely.
.WED AND WED NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
becoming SW 5 to 10 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.

$$

ANZ233-250300-
Vineyard Sound-
1016 AM EDT Sat Oct 24 2020

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...

.THIS AFTERNOON...SW winds around 5 kt, increasing to 10 to 15 kt
with gusts up to 20 kt. Seas 2 to 3 ft.
.TONIGHT...NW winds 10 to 15 kt, becoming N after midnight. Gusts
up to 20 kt. Seas 2 to 3 ft.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.SUN NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. A chance of showers.
.MON...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers.
.MON NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
2 to 3 ft. A chance of showers.
.TUE AND TUE NIGHT...N winds around 10 kt. Seas 2 to 3 ft.
Showers likely.
.WED AND WED NIGHT...N winds 5 to 10 kt, becoming W. 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.

$$

ANZ234-250300-
Buzzards Bay-
1016 AM EDT Sat Oct 24 2020

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...

.THIS AFTERNOON...SW winds around 5 kt, increasing to around
10 kt with gusts up to 20 kt. Seas around 2 ft. A slight chance
of showers.
.TONIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.SUN NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. A chance of showers.
.MON...E winds 10 to 15 kt with gusts up to 20 kt, diminishing to
5 to 10 kt in the afternoon. Seas 2 to 3 ft. A chance of showers.
.MON NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
around 2 ft. A chance of showers.
.TUE AND TUE NIGHT...N winds 5 to 10 kt. Seas around 2 ft.
Showers likely.
.WED...N winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
.WED NIGHT...W winds 5 to 10 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.

$$

ANZ235-250300-
Rhode Island Sound-
1016 AM EDT Sat Oct 24 2020

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...

.THIS AFTERNOON...SW winds 5 to 10 kt, increasing to 10 to 15 kt
with gusts up to 20 kt. Seas 4 to 6 ft. A slight chance of
showers.
.TONIGHT...NW winds 10 to 15 kt, becoming N 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 4 to 6 ft.
.SUN...N winds 15 to 20 kt, becoming NE 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 3 to 5 ft.
.SUN NIGHT...E winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft. A chance of showers.
.MON...E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. A chance of showers.
.MON NIGHT...SE winds around 10 kt, becoming SW with gusts up to
20 kt after midnight. Seas 2 to 4 ft. A chance of showers.
.TUE AND TUE NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Seas
2 to 3 ft. Showers likely.
.WED AND WED NIGHT...N winds 5 to 10 kt, becoming W 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.

$$

ANZ237-250300-
Block Island Sound-
1016 AM EDT Sat Oct 24 2020

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...

.THIS AFTERNOON...SW winds 5 to 10 kt, becoming W 10 to 15 kt
with gusts up to 20 kt. Seas 4 to 6 ft. A slight chance of
showers.
.TONIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to
6 ft.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.SUN NIGHT...E winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 ft. A chance of showers.
.MON...E winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft. A chance of showers.
.MON NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
3 to 4 ft. A chance of showers.
.TUE AND TUE NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. Showers
likely.
.WED AND WED NIGHT...N winds 5 to 10 kt, becoming W. 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.

$$

ANZ230-250300-
Boston Harbor-
1016 AM EDT Sat Oct 24 2020

.THIS AFTERNOON...SW winds 5 to 10 kt. Waves 1 foot or less,
except 2 to 4 ft at the outer harbor entrance. A slight chance of
showers.
.TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves
around 2 ft, except 3 to 5 ft at the outer harbor entrance.
.SUN...N winds 10 to 15 kt, becoming NE in the afternoon. Waves
around 2 ft.
.SUN NIGHT...E winds 5 to 10 kt. Waves 2 to 3 ft. A chance of
showers.
.MON...E winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers.
.MON NIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves
around 2 ft. A chance of showers.
.TUE AND TUE NIGHT...N winds 5 to 10 kt. Waves around 2 ft, then
1 foot or less. Showers likely.
.WED...N winds 5 to 10 kt. Waves 1 foot or less. A chance of
showers.
.WED NIGHT...SW winds 5 to 10 kt. Waves 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.

$$

ANZ236-250300-
Narragansett Bay-
1016 AM EDT Sat Oct 24 2020

.THIS AFTERNOON...SW winds 5 to 10 kt. Waves 2 to 4 ft. A slight
chance of showers.
.TONIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft.
.SUN...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE
5 to 10 kt in the afternoon. Waves 2 to 3 ft.
.SUN NIGHT...NE winds around 10 kt. Gusts up to 20 kt after
midnight. Waves 2 to 3 ft. A chance of showers.
.MON...E winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Waves 2 to 3 ft. A chance of showers.
.MON NIGHT...S winds 5 to 10 kt, becoming SW after midnight.
Waves around 2 ft. A chance of showers.
.TUE AND TUE NIGHT...N winds 5 to 10 kt. Waves around 2 ft.
Showers likely.
.WED AND WED NIGHT...N winds 5 to 10 kt, becoming SW. 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.

$$

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




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