412
FZUS51 KBOX 061918
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
Issued by National Weather Service Gray ME
318 PM EDT Tue May 6 2025

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

ANZ200-070815-
318 PM EDT Tue May 6 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres over the Canada maritimes will weaken and shift E thru
Wed as low pres over the Gt Lakes moves ENE into interior New
Eng. Areas mist and fog possible through tonight. High pres then
builds in for Thurs, before turning unsettled Fri into the
weekend.

$$

ANZ250-070815-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
318 PM EDT Tue May 6 2025

.TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Patchy fog. Showers likely with a slight chance of tstms
this evening, then a chance of showers after midnight. Vsby 1 NM
or less.
.WED...S winds around 10 kt. Seas 3 to 4 ft. Patchy dense fog in
the morning with vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft.
.THU...W winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to
3 ft.
.THU NIGHT...E winds around 5 kt, becoming NE 10 to 15 kt after
midnight. Seas 3 to 5 ft. A chance of showers after midnight.
.FRI AND FRI NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 5 ft. A chance of showers in the morning, then showers
likely.
.SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to
7 ft. A chance of showers.
.SAT NIGHT...W winds around 10 kt. Seas 5 to 7 ft.
.SUN...NW winds around 10 kt. Seas 4 to 6 ft.
.SUN NIGHT...SW winds around 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.

$$

ANZ251-070815-
Massachusetts Bay and Ipswich Bay-
318 PM EDT Tue May 6 2025

.TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt this evening.
Seas 2 to 3 ft. Patchy fog. A chance of showers with a slight
chance of tstms this evening. A slight chance of showers after
midnight. Vsby 1 NM or less.
.WED...S winds around 10 kt. Seas 2 to 3 ft. Patchy fog in the
morning with vsby 1 NM or less.
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.THU...W winds 5 to 10 kt, becoming E in the afternoon. Seas
around 2 ft.
.THU NIGHT...E winds 5 to 10 kt, becoming NE 10 to 15 kt after
midnight. Seas 2 to 4 ft. A chance of showers.
.FRI AND FRI NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. Showers likely. A chance of showers after
midnight.
.SAT...NW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers.
.SAT NIGHT...W winds around 10 kt. Seas 3 to 5 ft.
.SUN AND SUN NIGHT...NW winds around 10 kt, becoming SW. 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.

$$

ANZ231-070815-
Cape Cod Bay-
318 PM EDT Tue May 6 2025

.TONIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Patchy fog.
Showers likely with a slight chance of tstms this evening, then a
slight chance of showers after midnight. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt. Seas around 2 ft. Patchy fog in the
morning with vsby 1 NM or less.
.WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.
.THU...W winds 5 to 10 kt, becoming E in the afternoon. Seas
around 2 ft.
.THU NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers after midnight.
.FRI...NE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 4 ft. Showers likely.
.FRI NIGHT...NE winds around 10 kt. Seas 2 to 3 ft. Showers
likely, mainly in the evening.
.SAT...NW winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers.
.SAT NIGHT...W winds around 10 kt. Seas 3 to 5 ft.
.SUN...N winds 5 to 10 kt. Seas 2 to 4 ft.
.SUN NIGHT...SW 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.

$$

ANZ254-070815-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
318 PM EDT Tue May 6 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING...

.TONIGHT...S winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Seas 4 to 5 ft. Patchy fog. Showers likely with a
slight chance of tstms this evening, then a chance of showers
after midnight. Vsby 1 NM or less.
.WED...S winds around 10 kt. Seas 4 to 5 ft. Patchy fog in the
morning with vsby 1 NM or less.
.WED NIGHT...SW winds around 10 kt. Seas 3 to 5 ft.
.THU...W winds 5 to 10 kt, becoming S in the afternoon. Seas 3 to
4 ft.
.THU NIGHT...E winds 5 to 10 kt. Seas 3 to 5 ft. A chance of
showers after midnight.
.FRI AND FRI NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 6 ft. A chance of showers in the morning, then showers
likely through the night. A chance of showers after midnight.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft. A chance of showers.
.SAT NIGHT AND SUN...W winds 5 to 10 kt. Seas 4 to 6 ft.
.SUN NIGHT...SW 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.

$$

ANZ255-070815-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
318 PM EDT Tue May 6 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING...

.TONIGHT...S winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Seas 4 to 5 ft. Patchy fog. Showers likely with a
slight chance of tstms this evening, then a chance of showers
after midnight. Vsby 1 NM or less.
.WED...S winds around 10 kt. Seas 3 to 5 ft. Patchy fog in the
morning with vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 5 ft.
.THU...SW winds 5 to 10 kt. Seas 3 to 4 ft.
.THU NIGHT...E winds 5 to 10 kt. Seas 3 to 5 ft. A chance of
showers after midnight.
.FRI...NE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 4 to 6 ft. A chance of showers in the morning, then showers
likely in the afternoon.
.FRI NIGHT...E winds 10 to 15 kt, becoming SE with gusts up to
20 kt after midnight. Seas 4 to 6 ft. Showers likely, mainly in
the evening.
.SAT...W winds around 15 kt with gusts up to 20 kt. Seas 4 to
6 ft. A chance of showers.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 6 ft.
.SUN...W winds around 10 kt. Seas 3 to 5 ft.
.SUN NIGHT...SW 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.

$$

ANZ256-070815-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
318 PM EDT Tue May 6 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING...

.TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt this evening.
Seas 4 to 5 ft. Patchy dense fog. A chance of showers with a
slight chance of tstms this evening. A slight chance of showers
after midnight. Vsby 1 NM or less.
.WED...SW winds around 10 kt. Seas 4 to 5 ft. Patchy dense fog in
the morning with vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Seas 3 to 4 ft.
.THU...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
3 to 4 ft.
.THU NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas
3 to 5 ft. A chance of showers.
.FRI...NE winds 10 to 15 kt. Seas 5 to 7 ft. Showers likely.
.FRI NIGHT...E winds 10 to 15 kt, becoming NW with gusts up to
20 kt after midnight. Seas 5 to 7 ft. A chance of showers.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft. A chance of showers.
.SAT NIGHT THROUGH SUN NIGHT...SW 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.

$$

ANZ232-070815-
Nantucket Sound-
318 PM EDT Tue May 6 2025

.TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt this evening.
Seas 2 to 4 ft. Patchy fog. Showers likely with a slight chance
of tstms this evening. A chance of showers after midnight. Vsby
1 NM or less.
.WED...S winds around 10 kt. Seas 2 to 3 ft. Patchy fog in the
morning with vsby 1 NM or less.
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.THU...W winds 5 to 10 kt, becoming S in the afternoon. Seas
around 2 ft.
.THU NIGHT...E winds 5 to 10 kt. Seas 2 to 4 ft. A chance of
showers after midnight.
.FRI...NE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 3 to 4 ft. A chance of showers in the morning, then showers
likely in the afternoon.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. Showers
likely, mainly in the evening.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. A chance of showers.
.SAT NIGHT AND SUN...W winds 10 to 15 kt. Seas 2 to 4 ft.
.SUN NIGHT...SW 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.

$$

ANZ233-070815-
Vineyard Sound-
318 PM EDT Tue May 6 2025

.TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt this evening.
Seas 2 to 3 ft. Patchy fog this evening, then patchy dense fog
after midnight. Showers likely with isolated tstms this evening,
then a slight chance of showers after midnight. Vsby 1 NM or
less.
.WED...S winds 5 to 10 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Patchy dense fog in the morning with
vsby 1 NM or less.
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.THU...W winds 5 to 10 kt, becoming S in the afternoon. Seas
around 2 ft.
.THU NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers.
.FRI AND FRI NIGHT...N winds 10 to 15 kt. Seas 2 to 4 ft. Showers
likely. A chance of showers after midnight.
.SAT...W winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 10 to 15 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.

$$

ANZ234-070815-
Buzzards Bay-
318 PM EDT Tue May 6 2025

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

$$

ANZ235-070815-
Rhode Island Sound-
318 PM EDT Tue May 6 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT WEDNESDAY...

.TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt this evening.
Seas 3 to 4 ft. Patchy fog this evening, then patchy dense fog
after midnight. A chance of showers with a slight chance of tstms
this evening, then a slight chance of showers after midnight.
Vsby 1 NM or less.
.WED...SW winds around 10 kt. Seas 3 to 4 ft. Patchy dense fog in
the morning with vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Seas 2 to 4 ft.
.THU...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft.
.THU NIGHT...SE winds around 5 kt, becoming NE after midnight.
Seas 2 to 4 ft. A chance of showers.
.FRI AND FRI NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. Showers
likely. A chance of showers after midnight.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. A chance of showers.
.SAT NIGHT THROUGH SUN NIGHT...SW 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.

$$

ANZ237-070815-
Block Island Sound-
318 PM EDT Tue May 6 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT WEDNESDAY...

.TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 3 to 4 ft. Patchy
dense fog. A chance of showers with a slight chance of tstms this
evening. A slight chance of showers after midnight. Vsby 1 NM or
less.
.WED...SW winds 5 to 10 kt. Seas 3 to 4 ft. Patchy dense fog in
the morning with vsby 1 NM or less.
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft.
.THU...W winds around 5 kt, becoming SW in the afternoon. Seas
2 to 3 ft.
.THU NIGHT...SE winds around 5 kt, becoming NE after midnight.
Seas 2 to 4 ft. A chance of showers in the evening, then showers
likely after midnight.
.FRI...NE winds 10 to 15 kt. Seas 3 to 5 ft. Showers likely.
.FRI NIGHT...E winds around 10 kt, becoming N after midnight.
Seas 4 to 6 ft. A chance of showers.
.SAT...NW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers.
.SAT NIGHT THROUGH SUN NIGHT...SW 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.

$$

ANZ230-070815-
Boston Harbor-
318 PM EDT Tue May 6 2025

.TONIGHT...S winds 10 to 15 kt. Waves around 2 ft this evening,
then 1 foot or less. Patchy fog. A chance of showers with a
slight chance of tstms this evening, then a slight chance of
showers after midnight. Vsby 1 NM or less, increasing to 1 to
3 NM after midnight.
.WED...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon. A chance of showers. Patchy fog in the morning
with vsby 1 to 3 NM.
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.THU...W winds 5 to 10 kt, becoming NE in the afternoon. Waves
1 foot or less.
.THU NIGHT...NE winds 5 to 10 kt. Waves 1 foot or less. A chance
of showers.
.FRI AND FRI NIGHT...NE winds 10 to 15 kt. Waves around 2 ft.
Showers likely. A chance of showers after midnight.
.SAT...NW winds 10 to 15 kt. Waves around 2 ft. A chance of
showers.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Waves 1 foot
or less, except 2 to 4 ft at the outer harbor entrance.

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.

$$

ANZ236-070815-
Narragansett Bay-
318 PM EDT Tue May 6 2025

.TONIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Waves 2 to 3 ft. Patchy fog. A chance of showers with
isolated tstms this evening, then a slight chance of showers
after midnight. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt. Waves 2 to 3 ft. Patchy fog in the
morning with vsby 1 NM or less.
.WED NIGHT...SW winds 5 to 10 kt. Waves 2 to 3 ft.
.THU...W winds around 5 kt, becoming SW in the afternoon. Waves
around 2 ft.
.THU NIGHT...SE winds around 5 kt, becoming NE after midnight.
Waves around 2 ft. A chance of showers in the evening, then
showers likely after midnight.
.FRI AND FRI NIGHT...N winds around 10 kt. Waves 2 to 3 ft.
Showers likely .
.SAT...NW winds around 10 kt. Waves 2 to 3 ft. A chance of
showers.
.SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Waves around
2 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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