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 170516
CWFBOX

Coastal Waters Forecast
National Weather Service Boston/Norton MA
116 AM EDT Fri Aug 17 2018

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

ANZ200-171800-
116 AM EDT Fri Aug 17 2018

.Synopsis for Massachusetts and Rhode Island coastal waters...
A cold front will stall across the waters overnight then return N as
a warm front on Fri. Low pres will head east across northern  New
England on Sat, dragging its attendant cold front across the
waters. High pres will follow, building over northern New England
and Nova Scotia on Sun and Mon. The high will retreat NE on Tue.

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.

$$

ANZ250-171800-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...N winds around 5 kt. Seas 1 foot or less.
.FRI...E winds 5 to 10 kt, becoming SE 10 to 15 kt in the
afternoon. Seas 2 to 3 ft.
.FRI NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers and
tstms. Some tstms may produce gusty winds and heavy rainfall.
Vsby 1 to 3 NM.
.SAT...SW winds 10 to 15 kt, becoming NW in the afternoon. Seas
2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. A chance of showers.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
7 ft. A chance of showers.
.SUN NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 4 to 6 ft. A chance of showers.
.MON...NE winds around 10 kt. Seas 3 to 5 ft. A chance of
showers.
.MON NIGHT...NE winds 5 to 10 kt. Seas 2 to 4 ft.
.TUE...E winds 5 to 10 kt. Seas around 3 ft.
.TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. A chance of
showers.

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.

$$

ANZ251-171800-
Massachusetts Bay and Ipswich Bay-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...N winds around 5 kt. Seas 1 foot or less.
.FRI...NE winds around 5 kt, becoming SE in the afternoon. Seas
around 2 ft.
.FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. Vsby
1 to 3 NM.
.SAT...SW winds 5 to 10 kt, becoming NW in the afternoon. Seas
2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.SAT NIGHT...N winds 5 to 10 kt, becoming NE 10 to 15 kt after
midnight. Gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of showers.
.SUN NIGHT...NE winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas 3 to 5 ft. A chance of showers.
.MON...NE winds 5 to 10 kt. Seas around 3 ft.
.MON NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE NIGHT...S winds 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.

$$

ANZ231-171800-
Cape Cod Bay-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...N winds around 5 kt. Seas 1 foot or less.
.FRI...E winds around 5 kt, becoming SE in the afternoon. Seas
1 foot or less.
.FRI NIGHT...S winds around 10 kt. Seas around 2 ft. Patchy fog.
A chance of showers and tstms. Some tstms may produce gusty winds
and heavy rainfall. Vsby 1 to 3 NM.
.SAT...W winds 5 to 10 kt. Seas around 2 ft. Patchy fog. A chance
of showers. Vsby 1 to 3 NM.
.SAT NIGHT...N winds 10 to 15 kt, becoming NE 5 to 10 kt after
midnight. Gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. A chance
of showers.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of showers.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. A
chance of showers.
.MON...NE winds around 10 kt. Seas around 2 ft. A chance of
showers.
.MON NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE 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.

$$

ANZ254-171800-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...NW winds around 5 kt. Seas 2 to 3 ft.
.FRI...E winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to
3 ft.
.FRI NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers and
tstms. Some tstms may produce gusty winds and heavy rainfall.
Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.SAT NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft. A chance of showers.
.SUN NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 4 to 6 ft. A chance of showers.
.MON...NE winds around 10 kt. Seas 3 to 5 ft.
.MON NIGHT...NE winds 5 to 10 kt. Seas 3 to 5 ft.
.TUE...E winds 5 to 10 kt. Seas 3 to 5 ft.
.TUE NIGHT...S winds 5 to 10 kt. Seas 3 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.

$$

ANZ255-171800-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...S winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. Patchy fog. A chance of showers and tstms. Some tstms
may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM.
.SAT...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 4 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.SAT NIGHT...NW winds 10 to 15 kt, becoming N with gusts up to
20 kt after midnight. Seas 3 to 5 ft. Patchy fog. A chance of
showers. Vsby 1 to 3 NM.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.SUN NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 5 ft. A chance of showers.
.MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.MON NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.TUE...E winds 5 to 10 kt. Seas 3 to 5 ft.
.TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of
showers.

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.

$$

ANZ256-171800-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. Patchy fog. A chance of showers and tstms. Some tstms
may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM.
.SAT...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 4 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.SAT NIGHT...NW winds 10 to 15 kt, becoming NE with gusts up to
20 kt after midnight. Seas 3 to 5 ft. Patchy fog. A chance of
showers.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
5 ft.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. A chance of showers.
.MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.MON NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE...E winds 5 to 10 kt. Seas 2 to 4 ft.
.TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of
showers.

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.

$$

ANZ232-171800-
Nantucket Sound-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...NW winds around 5 kt. Seas 1 foot or less.
.FRI...E winds around 5 kt, becoming S in the afternoon. Seas
1 foot or less.
.FRI NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft. Patchy fog. A chance of showers and
tstms. Some tstms may produce gusty winds and heavy rainfall.
Vsby 1 to 3 NM.
.SAT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Patchy fog. A chance
of showers. Vsby 1 to 3 NM.
.SAT NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. A
chance of showers.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of showers.
.SUN NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft. A chance of showers.
.MON...NE winds 10 to 15 kt. Seas 2 to 3 ft.
.MON NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE 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.

$$

ANZ233-171800-
Vineyard Sound-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...NW winds around 5 kt. Seas 1 foot or less.
.FRI...E winds around 5 kt, becoming S in the afternoon. Seas
1 foot or less.
.FRI NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers and
tstms. Some tstms may produce gusty winds and heavy rainfall.
Vsby 1 to 3 NM.
.SAT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Patchy fog. A chance
of showers and tstms. Vsby 1 to 3 NM.
.SAT NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. A
chance of showers.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of showers.
.SUN NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. A chance of showers.
.MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.MON NIGHT...NE winds 5 to 10 kt. Seas around 2 ft.
.TUE...E winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of
showers.

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.

$$

ANZ234-171800-
Buzzards Bay-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...N winds around 5 kt. Seas 1 foot or less.
.FRI...E winds around 5 kt, becoming S in the afternoon. Seas
1 foot or less.
.FRI NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft. Patchy fog. A chance of showers and
tstms. Some tstms may produce gusty winds and heavy rainfall.
Vsby 1 to 3 NM.
.SAT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Patchy fog. A chance
of showers. Vsby 1 to 3 NM.
.SAT NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. A
chance of showers.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas around 2 ft. A
chance of showers.
.MON...NE winds around 10 kt with gusts up to 20 kt. Seas around
2 ft.
.MON NIGHT...NE winds 5 to 10 kt. Seas around 2 ft.
.TUE...E winds 5 to 10 kt. Seas 1 foot or less.
.TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of
showers.

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.

$$

ANZ235-171800-
Rhode Island Sound-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...NW winds 5 to 10 kt. Seas around 2 ft.
.FRI...SE winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Seas around 2 ft.
.FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. Patchy fog. A chance of showers and tstms. Some tstms
may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM.
.SAT...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 3 to 5 ft. Patchy fog. A chance of showers and tstms. Vsby
1 to 3 NM.
.SAT NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft. A chance of showers.
.MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.MON NIGHT...NE winds 10 to 15 kt. Seas 2 to 4 ft.
.TUE...E winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...S winds 10 to 15 kt. Seas around 2 ft. A chance of
showers.

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.

$$

ANZ237-171800-
Block Island Sound-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...W winds around 5 kt. Seas around 2 ft.
.FRI...SW winds around 5 kt, becoming S in the afternoon. Seas
around 2 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers and
tstms. Some tstms may produce gusty winds and heavy rainfall.
Vsby 1 to 3 NM.
.SAT...SW winds 10 to 15 kt. Seas 3 to 5 ft. Patchy fog. A chance
of showers. Vsby 1 to 3 NM.
.SAT NIGHT...NW winds 5 to 10 kt, becoming NE 10 to 15 kt after
midnight. Seas 2 to 4 ft. A chance of showers.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.SUN NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft.
.MON...NE winds around 10 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.MON NIGHT...NE winds 5 to 10 kt. Seas 2 to 4 ft.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers.

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.

$$

ANZ230-171800-
Boston Harbor-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...N winds around 5 kt. Waves 1 foot or less.
.FRI...E winds 5 to 10 kt. Waves 1 foot or less.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. Patchy
fog. A chance of showers and tstms. Some tstms may produce gusty
winds and heavy rainfall. Vsby 1 to 3 NM.
.SAT...SW winds around 5 kt, becoming NW in the afternoon. Waves
1 foot or less. Patchy fog. Showers likely with a chance of
tstms.
.SAT NIGHT...NE winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.
.SUN...NE winds 5 to 10 kt with gusts up to 20 kt. Waves 2 to
3 ft. A chance of showers.
.SUN NIGHT...NE winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.
.MON...NE winds 5 to 10 kt. Waves 1 foot or less.
.MON NIGHT...NE winds around 5 kt. Waves 1 foot or less.
.TUE...E winds around 5 kt. Waves 1 foot or less.
.TUE NIGHT...S winds around 5 kt. Waves 1 foot or less. A chance
of showers.

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.

$$

ANZ236-171800-
Narragansett Bay-
116 AM EDT Fri Aug 17 2018

.REST OF TONIGHT...N winds around 5 kt. Waves around 2 ft.
.FRI...E winds around 5 kt, becoming S in the afternoon. Waves
around 2 ft.
.FRI NIGHT...SW winds around 10 kt. Waves 2 to 4 ft. Patchy fog.
A chance of showers and tstms. Some tstms may produce gusty winds
and heavy rainfall. Vsby 1 to 3 NM.
.SAT...SW winds 5 to 10 kt. Waves 2 to 4 ft. Patchy fog. A chance
of showers and tstms. Vsby 1 to 3 NM.
.SAT NIGHT...N winds 5 to 10 kt. Waves 2 to 3 ft. A chance of
showers.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft. A chance of showers.
.SUN NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. A chance of
showers.
.MON...NE winds 5 to 10 kt. Waves around 2 ft.
.MON NIGHT...NE winds 5 to 10 kt. Waves around 2 ft.
.TUE...E winds around 5 kt. Waves around 2 ft.
.TUE NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.

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/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.