Coastal Waters Forecast
Issued by NWS Boston, MA

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097
FZUS51 KBOX 210204
CWFBOX

Coastal Waters Forecast
National Weather Service Boston/Norton MA
1004 PM EDT Mon Aug 20 2018

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

ANZ200-211430-
1004 PM EDT Mon Aug 20 2018

.Synopsis for Massachusetts and Rhode Island coastal waters...
A high pressure ridge builds slowly S across the region through
Tue. The onshore flow will bring a few showers and patchy fog
overnight into early Tue. The ridge will retreat E Tue night,
while low pres crosses the Great Lakes. As the low moves across
the St. Lawrence River valley Wed, its associated fronts will
cross the waters late Wed and Wed night. Large high pres will
build across the waters from the W Thu through Sat.

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.

$$

ANZ250-211430-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1004 PM EDT Mon Aug 20 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

.OVERNIGHT...NE winds 5 to 10 kt. Gusts up to 25 kt late this
evening. Seas 3 to 4 ft. Patchy drizzle.
.TUE...NE winds around 10 kt with gusts up to 20 kt. Seas 3 to
4 ft. Patchy drizzle.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Patchy fog. A
chance of showers. Vsby 1 NM or less.
.WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less.
.WED NIGHT...W winds around 10 kt. Seas 3 to 5 ft. A chance of
showers.
.THU...NW winds 5 to 10 kt. Seas 2 to 4 ft.
.THU NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft.
.FRI...W winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT...S winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...S 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.

$$

ANZ251-211430-
Massachusetts Bay and Ipswich Bay-
1004 PM EDT Mon Aug 20 2018

.OVERNIGHT...NE winds 5 to 10 kt. Seas 2 to 4 ft. Patchy drizzle.
.TUE...E winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Patchy drizzle. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog. A
chance of showers. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Patchy fog. A chance of showers. Vsby 1 NM or less.
.WED NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of
showers.
.THU...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...W winds 5 to 10 kt. Seas around 2 ft.
.FRI...SW winds around 5 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT...S winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...S 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.

$$

ANZ231-211430-
Cape Cod Bay-
1004 PM EDT Mon Aug 20 2018

.OVERNIGHT...NE winds 5 to 10 kt. Gusts up to 20 kt late this
evening. Seas around 2 ft. Patchy drizzle.
.TUE...E winds 5 to 10 kt with gusts up to 20 kt. Seas around
2 ft. Patchy drizzle.
.TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Patchy fog. A
chance of showers. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt, becoming SW 10 to 15 kt in the
afternoon. Gusts up to 25 kt. Seas around 2 ft. Patchy fog. A
chance of showers. Vsby 1 to 3 NM.
.WED NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft. A chance of showers.
.THU...NW winds 5 to 10 kt. Seas around 2 ft.
.THU NIGHT...W winds 5 to 10 kt. Seas around 2 ft.
.FRI...NW winds 5 to 10 kt. Seas 1 foot or less.
.FRI NIGHT...SW winds around 5 kt. Seas 1 foot or less.
.SAT...S winds 5 to 10 kt. Seas 1 foot or less.
.SAT 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.

$$

ANZ254-211430-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1004 PM EDT Mon Aug 20 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

.OVERNIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt.
Gusts up to 25 kt. Seas 3 to 5 ft. Areas of fog. Patchy drizzle.
Vsby 1 to 3 NM.
.TUE...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4
ft. Patchy fog. Patchy drizzle. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 5 ft. Patchy fog.
Vsby 1 NM or less.
.WED...S winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after
midnight. Seas 4 to 6 ft. A chance of showers.
.THU...N winds 5 to 10 kt. Seas 4 to 6 ft.
.THU NIGHT...NW winds 5 to 10 kt. Seas 3 to 5 ft.
.FRI...NW winds 5 to 10 kt. Seas 2 to 4 ft.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT...S winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...S 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.

$$

ANZ255-211430-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1004 PM EDT Mon Aug 20 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

.OVERNIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 ft. Areas of fog. Patchy drizzle. Vsby 1 to 3 NM.
.TUE...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4
ft. Patchy fog. Patchy drizzle. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 5 ft. Patchy fog. A
chance of showers. Vsby 1 NM or less.
.WED...S winds 10 to 15 kt, becoming SW 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 4 to 7 ft. Patchy fog. A
chance of showers. Vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt,
becoming NW after midnight. Seas 5 to 8 ft.
.THU...NW winds 5 to 10 kt. Seas 4 to 7 ft.
.THU NIGHT...NW winds 5 to 10 kt. Seas 3 to 5 ft.
.FRI...W winds 5 to 10 kt. Seas 2 to 4 ft.
.FRI NIGHT...SW winds around 5 kt. Seas 2 to 3 ft.
.SAT...S winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...S 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.

$$

ANZ256-211430-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1004 PM EDT Mon Aug 20 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

.OVERNIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. Areas of fog. Vsby 1 to 3 NM.
.TUE...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.TUE NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. Patchy fog. Showers likely with a chance of tstms.
Some tstms may produce heavy rainfall. Vsby 1 NM or less.
.WED...S winds 10 to 15 kt, becoming SW 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 4 to 7 ft. Patchy fog. Showers
likely with a chance of tstms. Some tstms may produce heavy
rainfall. Vsby 1 to 3 NM.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 25 kt, becoming
NW after midnight. Seas 5 to 8 ft.
.THU...N winds 10 to 15 kt, becoming NW 5 to 10 kt in the
afternoon. Seas 4 to 7 ft.
.THU NIGHT...NW winds 5 to 10 kt. Seas 3 to 5 ft.
.FRI...W winds 5 to 10 kt. Seas 3 to 4 ft.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT...S winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...S 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.

$$

ANZ232-211430-
Nantucket Sound-
1004 PM EDT Mon Aug 20 2018

.OVERNIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt.
Gusts up to 20 kt. Seas 2 to 3 ft. Areas of fog. Patchy drizzle.
Vsby 1 to 3 NM.
.TUE...E winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Patchy fog. Patchy drizzle. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 1 to 2 ft. Patchy fog.
Vsby 1 NM or less.
.WED...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW 5 to 10 kt after midnight. Seas 2 to 4 ft.
.THU...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...W winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
.SAT...S winds 5 to 10 kt. Seas 1 foot or less.
.SAT 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.

$$

ANZ233-211430-
Vineyard Sound-
1004 PM EDT Mon Aug 20 2018

.OVERNIGHT...NE winds 5 to 10 kt with gusts up to 20 kt. Seas
around 2 ft. Areas of fog. Patchy drizzle with vsby 1 to 3 NM.
.TUE...E winds 5 to 10 kt. Seas 1 to 2 ft. Patchy fog. Patchy
drizzle. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 1 to 2 ft. Patchy fog.
Showers likely with a chance of tstms. Some tstms may produce
heavy rainfall. Vsby 1 to 3 NM.
.WED...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Seas 2 to 4 ft.
.THU...NW winds 5 to 10 kt. Seas 2 to 4 ft.
.THU NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...W winds 5 to 10 kt. Seas around 2 ft.
.FRI NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.
.SAT...S winds 5 to 10 kt. Seas 1 foot or less.
.SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less.

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.

$$

ANZ234-211430-
Buzzards Bay-
1004 PM EDT Mon Aug 20 2018

.OVERNIGHT...NE winds 5 to 10 kt. Gusts up to 20 kt late this
evening. Seas 2 to 3 ft. Areas of fog. Patchy drizzle with vsby
1 to 3 NM.
.TUE...E winds 5 to 10 kt. Seas around 2 ft. Patchy drizzle. Vsby
1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Patchy fog. A
chance of showers. Vsby 1 to 3 NM.
.WED...SW winds 10 to 15 kt. Gusts up to 25 kt in the afternoon.
Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or
less.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW 5 to 10 kt after midnight. Seas 2 to 4 ft.
.THU...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...W winds around 5 kt. Seas around 2 ft.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
.SAT...S winds 5 to 10 kt. Seas 1 foot or less.
.SAT 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.

$$

ANZ235-211430-
Rhode Island Sound-
1004 PM EDT Mon Aug 20 2018

.OVERNIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft. Areas of fog.
.TUE...E winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas
2 to 3 ft.
.TUE NIGHT...SE winds 5 to 10 kt, increasing to 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
heavy rainfall. Vsby 1 NM or less.
.WED...SW 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.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW 5 to 10 kt after midnight. Seas 4 to 6 ft.
.THU...NW winds 5 to 10 kt. Seas 4 to 6 ft.
.THU NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft.
.FRI...W winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT...SW winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less.

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.

$$

ANZ237-211430-
Block Island Sound-
1004 PM EDT Mon Aug 20 2018

.OVERNIGHT...NE winds 5 to 10 kt with gusts up to 20 kt. Seas
2 to 4 ft.
.TUE...E winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas
2 to 3 ft.
.TUE NIGHT...SE winds 5 to 10 kt with gusts up to 20 kt. Seas
2 to 3 ft. Patchy fog. Showers likely with a chance of tstms.
Some tstms may produce heavy rainfall. Vsby 1 NM or less.
.WED...SW 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.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW 5 to 10 kt after midnight. Seas 3 to 5 ft.
.THU...NW winds 5 to 10 kt. Seas 3 to 5 ft.
.THU NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft.
.FRI...W winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.
.SAT...SW winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less.

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.

$$

ANZ230-211430-
Boston Harbor-
1004 PM EDT Mon Aug 20 2018

.OVERNIGHT...NE winds 5 to 10 kt. Waves 1 foot or less. Patchy
drizzle.
.TUE...NE winds 5 to 10 kt with gusts up to 20 kt. Waves around
2 ft. Patchy drizzle. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt. Waves 1 foot or less. Patchy
fog. Vsby 1 NM or less.
.WED...S winds around 5 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft. Patchy fog. Showers likely with a chance of
tstms. Some tstms may produce heavy rainfall. Vsby 1 NM or less.
.WED NIGHT...NW winds around 5 kt. Waves 1 foot or less. A chance
of showers.
.THU...NW winds around 5 kt. Waves 1 foot or less.
.THU NIGHT...W winds around 5 kt. Waves 1 foot or less.
.FRI...W winds around 5 kt. Waves 1 foot or less.
.FRI NIGHT...SW winds around 5 kt. Waves 1 foot or less.
.SAT...S winds around 5 kt. Waves 1 foot or less.
.SAT NIGHT...S 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.

$$

ANZ236-211430-
Narragansett Bay-
1004 PM EDT Mon Aug 20 2018

.OVERNIGHT...NE winds 5 to 10 kt. Waves around 2 ft.
.TUE...E winds 5 to 10 kt. Waves around 2 ft.
.TUE NIGHT...SE winds 5 to 10 kt. Waves around 2 ft. Patchy fog.
Showers likely with a chance of tstms. Some tstms may produce
heavy rainfall. Vsby 1 NM or less.
.WED...SW winds 5 to 10 kt with gusts up to 25 kt. Waves 2 to
4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.WED NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Waves 2 to 4 ft. A chance of showers.
.THU...NW winds 5 to 10 kt. Waves 2 to 3 ft.
.THU NIGHT...NW winds around 5 kt. Waves 2 to 3 ft.
.FRI...W winds around 5 kt. Waves around 2 ft.
.FRI NIGHT...SW winds around 5 kt. Waves around 2 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 foot or less.
.SAT NIGHT...S 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.

$$

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