Coastal Waters Forecast
Issued by NWS Boston, MA

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424
FZUS51 KBOX 180105
CWFBOX

Coastal Waters Forecast
National Weather Service Boston/Norton MA
904 PM EDT Sat Aug 17 2019

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

ANZ200-181400-
904 PM EDT Sat Aug 17 2019

.Synopsis for Massachusetts and Rhode Island coastal waters...
A weak ridge of high pressure across the region will result in
light east to southeast into early Sunday. Most of Monday will see
south to southwest winds ahead of an approaching cold front. The
cold front will cross the waters Monday night to bring northwest
winds for Tuesday.

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.

$$

ANZ250-181400-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
904 PM EDT Sat Aug 17 2019

.TONIGHT...SE winds 5 to 10 kt, diminishing to around 5 kt after
midnight. Seas 2 to 3 ft. Patchy fog. A chance of showers and
tstms, mainly this evening. Vsby 1 to 3 NM, decreasing to 1 NM or
less after midnight.
.SUN...SW winds around 5 kt, becoming SE in the afternoon. Seas
2 to 3 ft. Patchy fog. Vsby 1 NM or less.
.SUN NIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 2 to 3 ft. A chance of showers. Vsby 1 to 3 NM.
.MON...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 4 ft.
.MON NIGHT...SW 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...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas
2 to 4 ft. A chance of showers.
.TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers.
.WED THROUGH THU...W winds 10 to 15 kt. Seas 2 to 4 ft. A chance
of showers. Vsby 1 to 3 NM.

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.

$$

ANZ251-181400-
Massachusetts Bay and Ipswich Bay-
904 PM EDT Sat Aug 17 2019

.TONIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
around 2 ft. Patchy fog. A chance of showers and tstms, mainly
this evening. Vsby 1 to 3 NM, decreasing to 1 NM or less after
midnight.
.SUN...S winds around 5 kt, becoming SE 10 to 15 kt in the
afternoon. Seas around 2 ft. Patchy fog. Vsby 1 NM or less.
.SUN NIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas around 2 ft. A chance of showers. Vsby 1 to 3 NM.
.MON...S winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 to
3 NM.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE...NW winds around 5 kt, becoming E in the afternoon. Seas
around 2 ft. A chance of showers.
.TUE NIGHT...S winds around 5 kt. Seas 2 to 3 ft. A chance of
showers. Vsby 1 to 3 NM.
.WED THROUGH THU...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance
of showers. Vsby 1 to 3 NM.

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.

$$

ANZ231-181400-
Cape Cod Bay-
904 PM EDT Sat Aug 17 2019

.TONIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
1 foot or less. Patchy fog after midnight. A slight chance of
showers and tstms after midnight with vsby 1 NM or less.
.SUN...SW winds around 5 kt, becoming S in the afternoon. Seas
1 foot or less. Patchy fog. Vsby 1 NM or less.
.SUN NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Patchy fog.
A chance of showers. Vsby 1 to 3 NM.
.MON...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft.
.MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.
.TUE AND TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A
chance of showers. Vsby 1 to 3 NM.
.WED THROUGH THU...W 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.

$$

ANZ254-181400-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
904 PM EDT Sat Aug 17 2019

.TONIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas
2 to 4 ft. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less
after midnight.
.SUN...W winds around 5 kt, becoming S in the afternoon. Seas
2 to 4 ft. Patchy fog. Vsby 1 NM or less.
.SUN NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog. Vsby
1 NM or less.
.MON...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 4 ft.
.MON NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Seas 3 to 5 ft.
.TUE...NW winds 5 to 10 kt. Seas 2 to 4 ft.
.TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. A chance of
showers.
.WED...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers.
.WED THROUGH THU...W winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ255-181400-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
904 PM EDT Sat Aug 17 2019

.TONIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas
2 to 4 ft. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less
after midnight.
.SUN...W winds around 5 kt, becoming SW in the afternoon. Seas
2 to 4 ft. Patchy dense fog. Vsby 1 NM or less.
.SUN NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog. Vsby
1 NM or less.
.MON...S winds 5 to 10 kt. Seas 2 to 4 ft.
.MON NIGHT...SW winds 5 to 10 kt. Seas 3 to 5 ft.
.TUE...W winds 5 to 10 kt. Seas 2 to 4 ft.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of
showers.
.WED...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers.
.WED THROUGH THU...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 6 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.

$$

ANZ256-181400-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
904 PM EDT Sat Aug 17 2019

.TONIGHT...E winds 5 to 10 kt, becoming SW after midnight. Seas
around 3 ft. Patchy dense fog. A slight chance of showers and
tstms after midnight. Vsby 1 NM or less.
.SUN...W winds around 5 kt, becoming S in the afternoon. Seas
2 to 4 ft. Patchy dense fog. Vsby 1 NM or less.
.SUN NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Patchy fog. Vsby
1 to 3 NM.
.MON...S winds 5 to 10 kt. Seas 2 to 4 ft.
.MON NIGHT...SW winds 5 to 10 kt. Seas 3 to 5 ft. A chance of
showers.
.TUE...W winds 5 to 10 kt. Seas 3 to 4 ft.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of
showers.
.WED THROUGH THU...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 6 ft. A chance of showers.
.THU NIGHT...NW 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.

$$

ANZ232-181400-
Nantucket Sound-
904 PM EDT Sat Aug 17 2019

.TONIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas
1 foot or less. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or
less after midnight.
.SUN...W winds around 5 kt, becoming SW in the afternoon. Seas
1 foot or less. Patchy dense fog. Vsby 1 NM or less.
.SUN NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Patchy fog.
Vsby 1 NM or less.
.MON...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.MON NIGHT AND TUE...W winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. A chance of
showers.
.WED THROUGH THU...W winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ233-181400-
Vineyard Sound-
904 PM EDT Sat Aug 17 2019

.TONIGHT...E winds around 5 kt, becoming S around 5 kt after
midnight. Seas around 2 ft. Patchy fog. A slight chance of
showers and tstms after midnight with vsby 1 NM or less.
.SUN...W winds around 5 kt, becoming SW in the afternoon. Seas
around 2 ft. Patchy dense fog. Vsby 1 NM or less.
.SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Patchy fog.
Vsby 1 to 3 NM.
.MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 to
3 NM.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE AND TUE NIGHT...SW winds around 5 kt. Seas 2 to 3 ft. A
chance of showers.
.WED THROUGH THU...W 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.

$$

ANZ234-181400-
Buzzards Bay-
904 PM EDT Sat Aug 17 2019

.TONIGHT...S winds around 5 kt. Seas around 2 ft. Patchy fog
after midnight. A slight chance of showers and tstms after
midnight with vsby 1 NM or less.
.SUN...SW winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. Seas around 2 ft. Patchy dense fog. Vsby 1 NM or less.
.SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Patchy fog.
Vsby 1 to 3 NM.
.MON...SW winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Vsby
1 to 3 NM.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE AND TUE NIGHT...SW winds around 5 kt. Seas 2 to 3 ft. A
chance of showers. Vsby 1 to 3 NM.
.WED THROUGH THU...W winds 10 to 15 kt. Seas 2 to 3 ft. A chance
of showers. Vsby 1 to 3 NM.

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.

$$

ANZ235-181400-
Rhode Island Sound-
904 PM EDT Sat Aug 17 2019

.TONIGHT...E winds around 5 kt, becoming S around 5 kt after
midnight. Seas 2 to 3 ft. Patchy dense fog. A slight chance of
showers and tstms after midnight. Vsby 1 NM or less.
.SUN...SW winds around 5 kt, becoming S in the afternoon. Seas
2 to 3 ft. Patchy dense fog. Vsby 1 NM or less.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog.
Vsby 1 to 3 NM.
.MON...S winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 to
3 NM.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft.
.TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. A
chance of showers.
.WED...SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
.WED...SW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers.
.THU NIGHT...NW 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.

$$

ANZ237-181400-
Block Island Sound-
904 PM EDT Sat Aug 17 2019

.TONIGHT...E winds around 5 kt, becoming S around 5 kt after
midnight. Seas 2 to 3 ft. Patchy dense fog. A slight chance of
showers and tstms. Vsby 1 NM or less.
.SUN...SW winds around 5 kt, becoming S in the afternoon. Seas
2 to 3 ft. Patchy dense fog. Vsby 1 NM or less.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog.
Vsby 1 to 3 NM.
.MON...S winds 5 to 10 kt. Seas 2 to 4 ft.
.MON NIGHT AND TUE...SW winds 5 to 10 kt. Seas 2 to 4 ft.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers.
.WED...SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
.WED...SW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers.
.THU NIGHT...NW 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.

$$

ANZ230-181400-
Boston Harbor-
904 PM EDT Sat Aug 17 2019

.TONIGHT...SE winds 5 to 10 kt, becoming S after midnight. Waves
1 foot or less. A chance of showers and tstms, mainly this
evening. Patchy fog after midnight with vsby 1 to 3 NM.
.SUN...S winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less. Patchy fog. Vsby 1 NM or less.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. A chance
of showers and tstms. Vsby 1 to 3 NM.
.MON...SW winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. A
chance of showers. Vsby 1 to 3 NM.
.MON NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. A chance
of showers.
.TUE...NW winds around 5 kt, becoming E in the afternoon. Waves
1 foot or less. A chance of showers.
.TUE NIGHT...S winds around 5 kt. Waves 1 foot or less. A chance
of showers.
.WED THROUGH THU...SW winds 5 to 10 kt. Waves 1 foot or less. A
chance of showers. Vsby 1 to 3 NM.
.THU NIGHT...W winds 5 to 10 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.

$$

ANZ236-181400-
Narragansett Bay-
904 PM EDT Sat Aug 17 2019

.TONIGHT...S winds around 5 kt. Waves around 2 ft. Patchy fog
this evening. Patchy dense fog after midnight. A slight chance of
showers and tstms. Vsby 1 NM or less.
.SUN...SW winds around 5 kt, becoming S in the afternoon. Waves
2 to 3 ft. Patchy dense fog. Vsby 1 NM or less.
.SUN NIGHT...S winds 5 to 10 kt. Waves 2 to 3 ft. Patchy fog.
Vsby 1 to 3 NM.
.MON...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog. Vsby
1 to 3 NM.
.MON NIGHT...SW winds 5 to 10 kt. Waves 2 to 3 ft.
.TUE...W winds around 5 kt, becoming SW in the afternoon. Waves
2 to 3 ft. A chance of showers.
.TUE NIGHT...SW winds around 5 kt. Waves 2 to 3 ft. Patchy fog. A
chance of showers. Vsby 1 to 3 NM.
.WED THROUGH THU...SW winds 5 to 10 kt. Waves 2 to 3 ft. A chance
of showers. Vsby 1 to 3 NM.
.THU NIGHT...NW 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.

$$

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