Coastal Waters Forecast
Issued by NWS Boston, MA

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FZUS51 KBOX 272327
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
727 PM EDT Tue Jul 27 2021

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

ANZ200-281200-
727 PM EDT Tue Jul 27 2021

.Synopsis for Massachusetts and Rhode Island coastal waters...
Cold front moves through late today with showers and thunderstorms.
High pressure briefly moves in on Wednesday followed by low pressure
and showers Thursday into Friday.

For additional information on possible hazardous weather for the
week ahead, please visit www.weather.gov/boston/ehwo

$$

ANZ250-281200-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
727 PM EDT Tue Jul 27 2021

.TONIGHT...SE winds 5 to 10 kt, becoming N after midnight. Gusts
up to 25 kt. Seas 2 to 4 ft. A chance of showers. A chance of
tstms. Patchy fog after midnight. Some tstms may produce small
hail this evening.
.WED...NE winds 10 to 15 kt. Gusts up to 25 kt in the morning.
Seas 2 to 4 ft. A chance of showers.
.WED NIGHT...SE winds 5 to 10 kt, becoming SW after midnight.
Seas 2 to 3 ft.
.THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft. A chance of showers.
.THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. A chance of showers.
.FRI...W winds around 10 kt. Seas 2 to 4 ft. A chance of showers.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft.
.SAT AND SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt. Seas
2 to 4 ft.
.SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 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.

$$

ANZ251-281200-
Massachusetts Bay and Ipswich Bay-
727 PM EDT Tue Jul 27 2021

.TONIGHT...E winds 5 to 10 kt, becoming N after midnight. Gusts
up to 20 kt. Seas 2 to 3 ft. A chance of showers. A chance of
tstms. Patchy fog after midnight. Some tstms may produce small
hail this evening.
.WED...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. A chance of showers.
.WED NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
around 2 ft.
.THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft. A chance of showers.
.THU NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. A chance of showers.
.FRI...W winds around 10 kt. Seas 2 to 3 ft. A chance of showers.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft.
.SAT AND SAT NIGHT...W winds 10 to 15 kt, becoming SW 5 to 10 kt.
Seas 2 to 3 ft.
.SUN AND SUN NIGHT...SW winds 5 to 10 kt. Gusts up to 20 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.

$$

ANZ231-281200-
Cape Cod Bay-
727 PM EDT Tue Jul 27 2021

.TONIGHT...SW winds 5 to 10 kt, becoming N after midnight. Gusts
up to 20 kt. Seas around 2 ft. A slight chance of showers and
tstms this evening, then a chance of showers and tstms after
midnight. Patchy fog after midnight. Some tstms may produce small
hail this evening.
.WED...N winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers.
.WED NIGHT...E winds around 5 kt, becoming SW after midnight.
Seas around 2 ft.
.THU...S winds around 5 kt, increasing to around 10 kt in the
afternoon. Seas 1 foot or less. A chance of showers.
.THU NIGHT...S winds 10 to 15 kt. Seas around 2 ft. A chance of
showers.
.FRI...W winds around 10 kt. Seas around 2 ft. A chance of
showers.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft.
.SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ254-281200-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
727 PM EDT Tue Jul 27 2021

.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Gusts
up to 25 kt. Seas 2 to 3 ft. A slight chance of showers and tstms
this evening, then a chance of showers and tstms after midnight.
Patchy fog after midnight. Some tstms may produce small hail this
evening. Vsby 1 to 3 NM after midnight.
.WED...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.WED NIGHT...NE winds 5 to 10 kt, becoming SW after midnight.
Seas 2 to 3 ft.
.THU...S winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft. Patchy fog. A chance of showers.
.FRI...W winds around 10 kt. Seas 3 to 4 ft. A chance of showers.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft.
.SAT AND SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
becoming SW. Seas 3 to 5 ft.
.SUN AND SUN NIGHT...SW winds 10 to 15 kt. Gusts up to 20 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.

$$

ANZ255-281200-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
727 PM EDT Tue Jul 27 2021

.TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Gusts
up to 20 kt. Seas around 3 ft. Patchy fog after midnight. A
chance of showers and tstms after midnight with vsby 1 to 3 NM.
.WED...N winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. Patchy fog. A chance of showers and tstms. Vsby
1 to 3 NM.
.WED NIGHT...NE winds 10 to 15 kt, becoming SE around 5 kt after
midnight. Seas 2 to 3 ft.
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...S winds around 10 kt. Seas 2 to 3 ft. Patchy fog. A
chance of showers.
.FRI...W winds around 10 kt. Seas 2 to 4 ft. A chance of showers.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to
20 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.

$$

ANZ256-281200-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
727 PM EDT Tue Jul 27 2021

.TONIGHT...SW winds around 10 kt, becoming NW after midnight.
Gusts up to 20 kt. Seas 3 to 4 ft. A slight chance of showers. A
slight chance of tstms. Some tstms may produce small hail this
evening.
.WED...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas
2 to 3 ft.
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.THU NIGHT...S winds around 10 kt. Seas 2 to 3 ft. Patchy fog. A
chance of showers. Vsby 1 NM or less.
.FRI...W winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft.
.SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 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.

$$

ANZ232-281200-
Nantucket Sound-
727 PM EDT Tue Jul 27 2021

.TONIGHT...SW winds around 10 kt with gusts up to 20 kt, becoming
NW after midnight. Seas around 2 ft. A slight chance of showers
this evening, then a chance of showers and tstms after midnight.
.WED...N winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas around 2 ft. A chance of showers.
.WED NIGHT...NE winds 5 to 10 kt, becoming S after midnight. Seas
around 2 ft.
.THU...SE winds 5 to 10 kt. Seas 1 foot or less.
.THU NIGHT...S winds around 10 kt. Seas around 2 ft. Patchy fog.
A chance of showers.
.FRI...W winds around 10 kt. Seas around 2 ft. A chance of
showers.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft.
.SAT THROUGH SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ233-281200-
Vineyard Sound-
727 PM EDT Tue Jul 27 2021

.TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming N
after midnight. Seas around 2 ft. A slight chance of showers this
evening, then a chance of showers and tstms after midnight.
.WED...N winds 5 to 10 kt, becoming NE 10 to 15 kt in the
afternoon. Seas around 2 ft. A chance of showers and tstms.
.WED NIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas
1 foot or less.
.THU...SE winds 5 to 10 kt. Seas 1 foot or less. A chance of
showers.
.THU NIGHT...S winds around 10 kt. Seas around 2 ft. Patchy fog.
A chance of showers.
.FRI...W winds around 10 kt. Seas around 2 ft. A chance of
showers.
.FRI NIGHT...NW winds 10 to 15 kt. Seas around 2 ft.
.SAT THROUGH SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ234-281200-
Buzzards Bay-
727 PM EDT Tue Jul 27 2021

.TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming N
after midnight. Seas around 2 ft. A slight chance of showers and
tstms this evening, then a chance of showers and tstms after
midnight. Some tstms may produce small hail this evening.
.WED...N winds 5 to 10 kt. Seas around 2 ft. A chance of showers
and tstms.
.WED NIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas
1 foot or less.
.THU...S winds around 5 kt, increasing to around 10 kt in the
afternoon. Seas around 2 ft. A chance of showers.
.THU NIGHT...S winds around 10 kt. Seas 2 to 3 ft. Patchy fog. A
chance of showers.
.FRI...W winds around 10 kt. Seas 2 to 3 ft. A chance of showers.
.FRI NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft.
.SAT THROUGH SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ235-281200-
Rhode Island Sound-
727 PM EDT Tue Jul 27 2021

.TONIGHT...SW winds around 10 kt with gusts up to 20 kt, becoming
N after midnight. Seas 2 to 3 ft. A slight chance of showers. A
slight chance of tstms. Some tstms may produce small hail this
evening.
.WED...NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.WED NIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas
around 2 ft.
.THU...SE winds 5 to 10 kt. Seas around 2 ft. A chance of
showers.
.THU NIGHT...S winds around 10 kt. Seas 2 to 3 ft. Patchy fog. A
chance of showers.
.FRI...W winds around 10 kt. Seas 2 to 4 ft. A chance of showers.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft.
.SAT THROUGH SUN...SW winds 10 to 15 kt. Seas 2 to 4 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ237-281200-
Block Island Sound-
727 PM EDT Tue Jul 27 2021

.TONIGHT...SW winds 10 to 15 kt, becoming N 5 to 10 kt after
midnight. Gusts up to 20 kt. Seas 2 to 3 ft. A slight chance of
showers. A slight chance of tstms. Some tstms may produce small
hail this evening.
.WED...N winds 5 to 10 kt, becoming NE in the afternoon. Seas
around 2 ft. A chance of showers.
.WED NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
around 2 ft.
.THU...SE winds 5 to 10 kt. Seas around 2 ft. A chance of
showers.
.THU NIGHT...S winds around 10 kt. Seas 2 to 3 ft. Patchy fog. A
chance of showers. Vsby 1 NM or less.
.FRI...W winds around 10 kt. Seas 2 to 3 ft. A chance of showers.
.FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft.
.SAT AND SAT NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft.
.SUN AND SUN NIGHT...SW winds 10 to 15 kt. Gusts up to 20 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.

$$

ANZ230-281200-
Boston Harbor-
727 PM EDT Tue Jul 27 2021

...SEVERE THUNDERSTORM WATCH 396 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

.TONIGHT...E winds 5 to 10 kt, becoming N after midnight. Waves
around 2 ft. A chance of showers. A chance of tstms. Patchy fog
after midnight. Some tstms may be severe with damaging winds and
large hail this evening.
.WED...NE winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Waves around 2 ft. A chance of showers.
.WED NIGHT...SE winds around 5 kt, becoming SW after midnight.
Waves 1 foot or less.
.THU...S winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.
.THU NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.
.FRI...W winds 5 to 10 kt. Waves 1 foot or less. A chance of
showers.
.FRI NIGHT...NW winds around 10 kt. Waves 1 foot or less.
.SAT AND SAT NIGHT...W winds around 10 kt, becoming SW. Waves
around 2 ft, then 1 foot or less.
.SUN AND SUN NIGHT...SW 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.

$$

ANZ236-281200-
Narragansett Bay-
727 PM EDT Tue Jul 27 2021

...SEVERE THUNDERSTORM WATCH 396 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

.TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming N
after midnight. Waves 2 to 3 ft. A slight chance of showers and
tstms this evening, then a chance of showers and tstms after
midnight. Some tstms may be severe with damaging winds and large
hail this evening.
.WED...NE winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.
.WED NIGHT...SE winds around 5 kt, becoming S after midnight.
Waves around 2 ft.
.THU...S winds 5 to 10 kt. Waves 1 foot or less. A chance of
showers.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. Patchy
fog. A chance of showers.
.FRI...W winds 5 to 10 kt. Waves 1 foot or less. A chance of
showers.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less.
.SAT AND SAT NIGHT...W winds 5 to 10 kt. Waves 1 foot or less.
.SUN AND SUN NIGHT...SW winds 10 to 15 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.

$$

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