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
381
FZUS51 KBOX 190800
CWFBOX

Coastal Waters Forecast
National Weather Service Boston/Norton MA
400 AM EDT Thu Apr 19 2018

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

ANZ200-192015-
400 AM EDT Thu Apr 19 2018

.Synopsis for Massachusetts and Rhode Island coastal waters...
Low pressure over the Mid Atlantic coast will pass south of New
England today and south of Nova Scotia tonight. This will bring a
period of rain today, with leftover showers tonight. Strong wind
gusts follow on Friday. High pressure brings dry weather over the
waters this weekend.

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.

$$

ANZ250-192015-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
FRIDAY AFTERNOON...

.TODAY...SW winds 5 to 10 kt, becoming N this afternoon. Seas
2 to 3 ft. Rain. Vsby 1 to 3 NM.
.TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. A chance
of rain. Vsby 1 to 3 NM.
.FRI...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft.
.SAT...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W
5 to 10 kt in the afternoon. Seas 2 to 4 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft.
.SUN...W winds 5 to 10 kt. Seas around 2 ft.
.SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less.
.MON...NE winds 5 to 10 kt. Seas 1 foot or less.
.MON NIGHT...S winds 5 to 10 kt. Seas 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.

$$

ANZ251-192015-
Massachusetts Bay and Ipswich Bay-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
FRIDAY AFTERNOON...

.TODAY...W winds around 5 kt, becoming N this afternoon. Seas
1 foot or less. Rain. Snow likely this morning. Vsby 1 to 3 NM.
.TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas around 2 ft. Patchy fog. A
chance of rain. Vsby 1 to 3 NM.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft.
.SAT...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. Seas around 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft.
.SUN...NW winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less.
.MON...NE winds 5 to 10 kt. Seas 1 foot or less.
.MON NIGHT...S winds 5 to 10 kt. Seas 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.

$$

ANZ231-192015-
Cape Cod Bay-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
FRIDAY AFTERNOON...

.TODAY...SE winds 5 to 10 kt, becoming N this afternoon. Seas
1 foot or less. Rain. Vsby 1 to 3 NM.
.TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas around 2 ft. Patchy fog. A
chance of rain.
.FRI...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 3 ft.
.FRI NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 2 to 3 ft.
.SAT...NW 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.
.SAT NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas
1 foot or less.
.SUN...N winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less.
.MON...NE winds 5 to 10 kt. Seas 1 foot or less.
.MON NIGHT...S winds 5 to 10 kt. Seas 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.

$$

ANZ254-192015-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
FRIDAY EVENING...

.TODAY...SE winds 5 to 10 kt, becoming NE with gusts up to 20 kt
this afternoon. Seas 2 to 4 ft. Rain. Vsby 1 to 3 NM, decreasing
to 1 NM or less this afternoon.
.TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. Patchy fog. A chance of rain.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 ft.
.SAT...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. Seas 2 to 4 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.SUN...NW winds 5 to 10 kt. Seas around 2 ft.
.SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft.
.MON...N winds 5 to 10 kt. Seas 1 foot or less.
.MON NIGHT...S winds around 5 kt. Seas 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.

$$

ANZ255-192015-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
FRIDAY EVENING...

.TODAY...E winds 10 to 15 kt, becoming N with gusts up to 20 kt
this afternoon. Seas 2 to 4 ft. Rain likely. Vsby 1 to 3 NM this
afternoon.
.TONIGHT...NW winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance
of rain.
.FRI...NW winds 15 to 20 kt, becoming W 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas 4 to 6 ft.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft.
.SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.SAT NIGHT...W winds 10 to 15 kt, becoming NW 5 to 10 kt with
gusts up to 20 kt after midnight. Seas 2 to 3 ft.
.SUN...W winds 5 to 10 kt. Seas around 2 ft.
.SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft.
.MON...NE winds 5 to 10 kt. Seas around 2 ft.
.MON NIGHT...SE winds 5 to 10 kt. Seas 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.

$$

ANZ256-192015-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
FRIDAY EVENING...

.TODAY...E winds 10 to 15 kt, becoming N this afternoon. Gusts up
to 20 kt. Seas 2 to 3 ft. Rain likely. Vsby 1 to 3 NM this
afternoon.
.TONIGHT...NW winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Patchy fog. A chance
of rain.
.FRI...NW winds 15 to 20 kt, becoming W 10 to 15 kt in the
afternoon. Gusts up to 30 kt. Seas 4 to 7 ft.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 ft.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.SAT NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft.
.SUN...W winds around 10 kt. Seas around 2 ft.
.SUN NIGHT...NW winds 10 to 15 kt. Seas around 2 ft.
.MON...E winds 5 to 10 kt. Seas 1 foot or less.
.MON NIGHT...SE winds 5 to 10 kt. Seas 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.

$$

ANZ232-192015-
Nantucket Sound-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
FRIDAY AFTERNOON...

.TODAY...E winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up
to 20 kt this afternoon. Seas around 2 ft. Rain. Vsby 1 to 3 NM.
.TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. A chance
of rain.
.FRI...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.
.FRI NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas around 2 ft.
.SAT...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Seas around 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas
1 foot or less.
.SUN...NW winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less.
.MON...NE winds 5 to 10 kt. Seas 1 foot or less.
.MON NIGHT...S winds 5 to 10 kt. Seas 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.

$$

ANZ233-192015-
Vineyard Sound-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
FRIDAY AFTERNOON...

.TODAY...E winds 5 to 10 kt, becoming N this afternoon. Seas
around 2 ft. Rain. Vsby 1 to 3 NM.
.TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Patchy fog. A chance of rain.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft.
.SAT...W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas around 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.SUN...W winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...W winds around 10 kt. Seas 1 foot or less.
.MON...E winds 5 to 10 kt. Seas 1 foot or less.
.MON NIGHT...S winds 5 to 10 kt. Seas 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.

$$

ANZ234-192015-
Buzzards Bay-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
FRIDAY AFTERNOON...

.TODAY...E winds 5 to 10 kt, becoming N this afternoon. Seas
around 2 ft. Rain. Vsby 1 to 3 NM.
.TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Patchy fog. A chance
of rain.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft.
.FRI NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas
around 2 ft.
.SAT...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Seas around 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less.
.SUN...W winds 5 to 10 kt. Seas 1 foot or less.
.SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less.
.MON...NE winds 5 to 10 kt. Seas 1 foot or less.
.MON NIGHT...S winds 5 to 10 kt. Seas 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.

$$

ANZ235-192015-
Rhode Island Sound-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
FRIDAY AFTERNOON...

.TODAY...E winds 10 to 15 kt, becoming N this afternoon. Seas
2 to 3 ft. Rain. Vsby 1 to 3 NM this afternoon.
.TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft. Patchy fog. A chance of rain.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft.
.SAT...W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.SUN...W winds 5 to 10 kt. Seas around 2 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.MON...E winds 5 to 10 kt. Seas 1 foot or less.
.MON NIGHT...S winds 5 to 10 kt. Seas 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.

$$

ANZ237-192015-
Block Island Sound-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
FRIDAY AFTERNOON...

.TODAY...NE winds 5 to 10 kt, becoming N this afternoon. Seas
2 to 3 ft. Rain. Vsby 1 to 3 NM this afternoon.
.TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. Patchy fog. A chance of rain.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft.
.SAT...W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.SUN...W winds 5 to 10 kt. Seas around 2 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.MON...E winds 5 to 10 kt. Seas 1 foot or less.
.MON NIGHT...S winds 5 to 10 kt. Seas 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.

$$

ANZ230-192015-
Boston Harbor-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
FRIDAY AFTERNOON...

.TODAY...W winds around 5 kt, becoming N this afternoon. Waves
1 foot or less. Rain. Vsby 1 to 3 NM.
.TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Waves around 2 ft. Patchy fog. A
chance of rain. Vsby 1 to 3 NM.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Waves around
2 ft.
.FRI NIGHT...NW winds 5 to 10 kt with gusts up to 25 kt. Waves
around 2 ft.
.SAT...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Waves around 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less.
.SUN...NW winds 5 to 10 kt. Waves 1 foot or less.
.SUN NIGHT...NW winds around 5 kt. Waves 1 foot or less.
.MON...NE winds around 5 kt. Waves 1 foot or less.
.MON NIGHT...S winds around 5 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.

$$

ANZ236-192015-
Narragansett Bay-
400 AM EDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
FRIDAY AFTERNOON...

.TODAY...NE winds 5 to 10 kt, becoming N this afternoon. Waves
around 2 ft. Rain.
.TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Gusts up to 25 kt. Waves 2 to 3 ft. Patchy fog. A
chance of rain.
.FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to
3 ft.
.FRI NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Waves
around 2 ft.
.SAT...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Waves around 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less.
.SUN...NW winds around 5 kt. Waves 1 foot or less.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less.
.MON...E winds around 5 kt. Waves 1 foot or less.
.MON NIGHT...S 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.

$$

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.