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 181116
CWFBOX

Coastal Waters Forecast
National Weather Service Boston/Norton MA
716 AM EDT Sat Aug 18 2018

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

ANZ200-190000-
716 AM EDT Sat Aug 18 2018

.Synopsis for Massachusetts and Rhode Island coastal waters...
Low pres will move across northern New England today, pushing  its
associated cold front across the waters. The front will stall across
the southern waters tonight through Mon, with weak low pres waves
moving along it. The high will build N of the waters through Tue.
Another front will approach the waters during Wed.

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.

$$

ANZ250-190000-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
716 AM EDT Sat Aug 18 2018

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

.TODAY...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt this afternoon. Seas 2 to 3 ft. Showers likely with
a chance of tstms this afternoon. Some tstms may produce gusty
winds and heavy rainfall this afternoon with vsby 1 to 3 NM.
.TONIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. Showers likely with a chance of tstms. Some tstms may
produce gusty winds and heavy rainfall. Vsby 1 to 3 NM.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft. A chance of showers.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft.
.MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.MON NIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft.
.TUE...E winds 5 to 10 kt. Seas 2 to 4 ft.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of
showers.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. A chance of showers.
.WED NIGHT...W winds 10 to 15 kt. Seas 3 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.

$$

ANZ251-190000-
Massachusetts Bay and Ipswich Bay-
716 AM EDT Sat Aug 18 2018

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

.TODAY...W winds 5 to 10 kt. Seas 1 foot or less. A slight chance
of showers with isolated tstms this morning, then showers likely
with a chance of tstms this afternoon. Some tstms may produce
gusty winds and heavy rainfall this afternoon.
.TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Showers likely with a chance of tstms. Some tstms may
produce gusty winds and heavy rainfall. Vsby 1 to 3 NM.
.SUN...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. A chance of showers.
.SUN NIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Gusts up to 20 kt. Seas 2 to 4 ft.
.MON...NE winds 10 to 15 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 around 5 kt. Seas 2 to 4 ft.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. A chance of
showers.
.WED...S winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers
and tstms.
.WED NIGHT...W winds 5 to 10 kt. Seas 2 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.

$$

ANZ231-190000-
Cape Cod Bay-
716 AM EDT Sat Aug 18 2018

.TODAY...SW winds 5 to 10 kt. Seas 1 foot or less. A chance of
showers and tstms this afternoon. Some tstms may produce gusty
winds and heavy rainfall this afternoon.
.TONIGHT...N winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts
up to 20 kt after midnight. Seas 2 to 3 ft. A chance of showers
and tstms. Some tstms may produce gusty winds and heavy rainfall.
Vsby 1 to 3 NM.
.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. Seas
2 to 3 ft. A chance of showers.
.MON...NE winds 10 to 15 kt with gusts up to 20 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 around 2 ft.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. A chance
of showers.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 1 foot or
less. A chance of showers.
.WED 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.

$$

ANZ254-190000-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
716 AM EDT Sat Aug 18 2018

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

.TODAY...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Showers likely with isolated tstms this morning. A chance
of showers and tstms this afternoon. Patchy fog this morning.
Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to
3 NM this morning.
.TONIGHT...W winds 5 to 10 kt, becoming N 10 to 15 kt with gusts
up to 20 kt after midnight. Seas 2 to 4 ft. Patchy fog. A chance
of showers. Vsby 1 NM or less.
.SUN...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 ft. A chance of showers. Vsby 1 to 3 NM.
.MON...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to
6 ft. A chance of showers.
.MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 3 to 5 ft.
.TUE...NE winds 5 to 10 kt. Seas 3 to 5 ft.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of showers.
.WED NIGHT...W winds 10 to 15 kt. Seas 4 to 6 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.

$$

ANZ255-190000-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
716 AM EDT Sat Aug 18 2018

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

.TODAY...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A slight chance of showers. Isolated tstms this morning,
then a slight chance of tstms this afternoon. Patchy fog this
morning. Some tstms may produce gusty winds and heavy rainfall
this morning with vsby 1 to 3 NM.
.TONIGHT...W winds 5 to 10 kt, becoming N 10 to 15 kt after
midnight. Gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. A chance
of showers. Vsby 1 NM or less.
.SUN...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 ft. A chance of showers. Vsby 1 to 3 NM.
.MON...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to
6 ft. A chance of showers.
.MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 3 to 5 ft.
.TUE...NE winds 5 to 10 kt. Seas 3 to 5 ft.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. A chance of
showers.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of showers and tstms.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 7 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.

$$

ANZ256-190000-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
716 AM EDT Sat Aug 18 2018

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

.TODAY...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
3 ft. Showers with tstms likely this morning. A chance of showers
and tstms this afternoon. Some tstms may produce gusty winds and
heavy rainfall this morning with vsby 1 to 3 NM.
.TONIGHT...W winds 10 to 15 kt, becoming N after midnight. Gusts
up to 25 kt. Seas 3 to 4 ft. Patchy fog. A chance of showers.
Vsby 1 NM or less.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft. A chance of showers.
.SUN NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. A chance of
showers.
.MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft. A chance of showers.
.MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 5 ft.
.TUE...E winds 5 to 10 kt. Seas 3 to 4 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of
showers.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of showers and tstms.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 7 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.

$$

ANZ232-190000-
Nantucket Sound-
716 AM EDT Sat Aug 18 2018

.TODAY...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. A chance of showers. Isolated tstms this morning, then a
chance of tstms this afternoon. Patchy fog this morning. Some
tstms may produce gusty winds and heavy rainfall this morning
with vsby 1 to 3 NM.
.TONIGHT...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts
up to 20 kt after midnight. Seas around 2 ft. Patchy fog. A
chance of showers. Vsby 1 to 3 NM.
.SUN...NE winds 10 to 15 kt with gusts up to 25 kt. Seas around
2 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of showers.
.MON...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. A chance of showers.
.MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers and tstms.
.WED NIGHT...W winds 10 to 15 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.

$$

ANZ233-190000-
Vineyard Sound-
716 AM EDT Sat Aug 18 2018

...SMALL CRAFT ADVISORY IN EFFECT SUNDAY AFTERNOON...

.TODAY...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Patchy fog this morning. A chance of showers and tstms this
afternoon.
.TONIGHT...NW winds 5 to 10 kt, becoming NE 10 to 15 kt with
gusts up to 20 kt after midnight. Seas around 2 ft. Patchy fog.
Showers likely with a chance of tstms. Some tstms may produce
gusty winds and heavy rainfall. Vsby 1 to 3 NM.
.SUN...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. A chance of showers.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft. A chance of showers.
.MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers.
.MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.
.TUE...E winds 5 to 10 kt. Seas around 2 ft.
.TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. A chance of
showers.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers and tstms.
.WED NIGHT...W winds 10 to 15 kt. Seas 2 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.

$$

ANZ234-190000-
Buzzards Bay-
716 AM EDT Sat Aug 18 2018

...SMALL CRAFT ADVISORY IN EFFECT SUNDAY AFTERNOON...

.TODAY...SW winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas around 2 ft. A chance of showers and tstms this afternoon.
.TONIGHT...NW winds 5 to 10 kt, becoming NE 10 to 15 kt with
gusts up to 20 kt after midnight. Seas around 2 ft. Patchy fog.
Showers likely with a chance of tstms. Some tstms may produce
gusty winds and heavy rainfall. Vsby 1 to 3 NM.
.SUN...NE winds 10 to 15 kt with gusts up to 25 kt. Seas around
2 ft. A chance of showers.
.SUN NIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Gusts up to 25 kt. Seas around 2 ft. A chance of
showers.
.MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers.
.MON NIGHT...NE winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft.
.TUE...E winds 5 to 10 kt. Seas 1 foot or less.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. A chance
of showers.
.WED...S winds 10 to 15 kt. Seas around 2 ft. A chance of showers
and tstms.
.WED 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.

$$

ANZ235-190000-
Rhode Island Sound-
716 AM EDT Sat Aug 18 2018

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

.TODAY...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. A chance of showers and tstms this afternoon.
.TONIGHT...W winds 5 to 10 kt, becoming NE 10 to 15 kt after
midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. Showers
likely with a chance of tstms. Some tstms may produce gusty winds
and heavy rainfall. Vsby 1 NM or less.
.SUN...NE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of
showers.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft. A chance of showers.
.MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of showers.
.MON 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.
.TUE...E winds 5 to 10 kt. Seas 2 to 4 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of showers and tstms.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
3 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.

$$

ANZ237-190000-
Block Island Sound-
716 AM EDT Sat Aug 18 2018

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

.TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt this afternoon.
Seas 2 to 3 ft. A chance of showers and tstms this afternoon.
.TONIGHT...W winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts
up to 20 kt after midnight. Seas 2 to 3 ft. Patchy fog. Showers
likely with a chance of tstms. Some tstms may produce gusty winds
and heavy rainfall. Vsby 1 NM or less.
.SUN...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. A chance of showers.
.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 3 to
5 ft. A chance of showers.
.MON NIGHT...NE winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft.
.TUE...E winds 5 to 10 kt. Seas 2 to 4 ft.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of showers and tstms.
.WED NIGHT...W winds 5 to 10 kt. Seas 3 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.

$$

ANZ230-190000-
Boston Harbor-
716 AM EDT Sat Aug 18 2018

.TODAY...W winds 5 to 10 kt. Waves 1 foot or less. A slight
chance of showers with isolated tstms this morning, then showers
likely with a chance of tstms this afternoon. Some tstms may
produce gusty winds and heavy rainfall this afternoon.
.TONIGHT...NE winds 5 to 10 kt. Waves around 2 ft. Showers likely
with a chance of tstms. Some tstms may produce gusty winds and
heavy rainfall. Vsby 1 to 3 NM.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 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 with gusts up to 20 kt. Waves around
2 ft.
.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...SE winds around 5 kt. Waves 1 foot or less. A chance
of showers.
.WED...S winds 5 to 10 kt. Waves 1 foot or less. Showers likely
with a chance of tstms.
.WED NIGHT...W 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.

$$

ANZ236-190000-
Narragansett Bay-
716 AM EDT Sat Aug 18 2018

.TODAY...SW winds 5 to 10 kt. Waves around 2 ft. A chance of
showers and tstms this afternoon. Some tstms may produce gusty
winds and heavy rainfall this afternoon.
.TONIGHT...NW winds 5 to 10 kt, becoming NE after midnight. Waves
around 2 ft. Showers likely with a chance of tstms. Some tstms
may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft. A chance of showers.
.SUN NIGHT...NE winds 5 to 10 kt with gusts up to 20 kt. Waves
around 2 ft. A chance of showers.
.MON...NE winds 5 to 10 kt with gusts up to 20 kt. Waves 2 to
3 ft.
.MON NIGHT...NE winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Waves 2 to 3 ft.
.TUE...E winds around 5 kt. Waves around 2 ft.
.TUE NIGHT...SE winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.
.WED...S winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers
and tstms.
.WED NIGHT...W winds 5 to 10 kt. Waves 2 to 3 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.

$$

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.