597
FZUS51 KBOX 210804
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Tue May 21 2024

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

ANZ200-212100-
404 AM EDT Tue May 21 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres remains planted off the Mid Atlantic coast today. The high
drifts further southeast on Wed. A cold front moves into New Eng
Thu. A weak high builds in on Fri. Unsettled through the weekend
into early next week with several lows sliding through.

$$

ANZ250-212100-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
404 AM EDT Tue May 21 2024

.TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and S 2 ft at
4 seconds. Areas of dense fog this morning with vsby 1 NM or
less.
.TONIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 3 ft at
9 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less
after midnight.
.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and E 3 ft at 8 seconds.
Patchy fog in the morning with vsby 1 NM or less.
.WED NIGHT...SW winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail:
SW 3 ft at 4 seconds and E 2 ft at 8 seconds.
.THU AND THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at
8 seconds. A chance of showers.
.FRI THROUGH SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft.
Wave Detail: W 1 foot at 3 seconds and S 1 foot at 4 seconds.

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.

$$

ANZ251-212100-
Massachusetts Bay and Ipswich Bay-
404 AM EDT Tue May 21 2024

.TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 9 seconds and S 2 ft at 4 seconds. Areas of dense fog this
morning with vsby 1 NM or less.
.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 4 seconds.
Patchy fog after midnight with vsby 1 NM or less.
.WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and SW 2 ft at
4 seconds. Patchy 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 3 ft. Wave Detail: S 2 ft at 4 seconds and E
2 ft at 8 seconds.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot
at 7 seconds. A chance of showers in the afternoon.
.THU NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 4 seconds and E 1 foot at 7 seconds. Showers likely
with a chance of tstms in the evening, then a chance of showers
after midnight.
.FRI THROUGH SAT NIGHT...SE 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.

$$

ANZ231-212100-
Cape Cod Bay-
404 AM EDT Tue May 21 2024

.TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds and S 1 foot at 3 seconds. Areas of dense fog this
morning with vsby 1 NM or less.
.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: E 2 ft at 9 seconds and SW 1 foot at
3 seconds. Patchy fog in the evening, then areas of fog after
midnight with vsby 1 NM or less.
.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 8 seconds.
Patchy fog in the morning with vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
8 seconds.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot
at 8 seconds.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave
Detail: SW 2 ft at 4 seconds and E 1 foot at 8 seconds. A chance
of showers.
.FRI...SW winds 5 to 10 kt. Seas 1 foot or less. A chance of
showers.
.FRI NIGHT THROUGH SAT NIGHT...SE 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.

$$

ANZ254-212100-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
404 AM EDT Tue May 21 2024

.TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 9 seconds and SW 1 foot at 3 seconds. Areas of dense fog this
morning, then patchy fog this afternoon. Vsby 1 NM or less.
.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: E 4 ft at 9 seconds and SW 2 ft at 3 seconds.
Patchy fog in the evening, then areas of dense fog after
midnight. Vsby 1 NM or less.
.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: E 3 ft at 8 seconds and SW 2 ft at 4 seconds.
Areas of fog in the morning with vsby 1 NM or less.
.WED NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at
8 seconds.
.THU...SW winds around 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 8 seconds.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at
7 seconds. A chance of showers.
.FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to
3 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.

$$

ANZ255-212100-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
404 AM EDT Tue May 21 2024

.TODAY...SW winds around 5 kt, increasing to 5 to 10 kt this
afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and
SW 1 foot at 3 seconds. Areas of dense fog this morning, then
patchy fog this afternoon. Vsby 1 NM or less.
.TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and SW
2 ft at 4 seconds. Areas of dense fog. Vsby 1 NM or less.
.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and E 3 ft at 8 seconds.
Areas of fog in the morning with vsby 1 NM or less.
.WED NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas
around 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 2 ft at
8 seconds.
.THU...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft
at 5 seconds and E 2 ft at 8 seconds.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at
8 seconds. A chance of showers.
.FRI...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...SE winds around 10 kt. Seas 2 to
3 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.

$$

ANZ256-212100-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
404 AM EDT Tue May 21 2024

.TODAY...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds and SW 1 foot at 3 seconds. Areas of dense fog. Vsby
1 NM or less.
.TONIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds and SW 2 ft at 3 seconds. Areas of dense fog.
Vsby 1 NM or less.
.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and E 3 ft at 9 seconds.
Areas of fog in the morning with vsby 1 NM or less.
.WED NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at
8 seconds.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at
8 seconds.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at
8 seconds. A chance of showers.
.FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.FRI NIGHT AND SAT...SW winds 5 to 10 kt, becoming SE. Seas 2 to
3 ft.
.SAT NIGHT...SE winds around 10 kt. Seas around 2 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.

$$

ANZ232-212100-
Nantucket Sound-
404 AM EDT Tue May 21 2024

.TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt this afternoon. Seas around 2 ft. Wave Detail:
E 2 ft at 8 seconds and SW 1 foot at 3 seconds. Areas of dense
fog this morning with vsby 1 NM or less.
.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at
9 seconds. Patchy fog in the evening, then areas of fog after
midnight. Vsby 1 NM or less.
.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
8 seconds. Areas of fog in the morning with vsby 1 NM or less.
.WED NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
8 seconds.
.THU...SW winds around 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
7 seconds.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
7 seconds. A chance of showers.
.FRI...SW winds around 10 kt. Seas around 2 ft. A chance of
showers.
.FRI NIGHT THROUGH SAT NIGHT...SE 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.

$$

ANZ233-212100-
Vineyard Sound-
404 AM EDT Tue May 21 2024

.TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt this afternoon.
Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and E
1 foot at 9 seconds. Areas of dense fog this morning, then patchy
fog this afternoon. Vsby 1 NM or less.
.TONIGHT...SW winds around 10 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and
E 1 foot at 9 seconds. Patchy fog in the evening, then areas of
fog after midnight. Vsby 1 NM or less.
.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
9 seconds. Patchy 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 around 2 ft. Wave Detail: SW 2 ft at 4 seconds and
E 1 foot at 9 seconds.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot
at 8 seconds.
.THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and
SE 1 foot at 8 seconds. A chance of showers.
.FRI...SW winds 5 to 10 kt. Seas around 2 ft. A chance of
showers.
.FRI NIGHT THROUGH SAT NIGHT...SE 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.

$$

ANZ234-212100-
Buzzards Bay-
404 AM EDT Tue May 21 2024

.TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt this afternoon. Seas around 2 ft. Wave Detail:
SW 1 foot at 2 seconds and E 1 foot at 9 seconds. Areas of dense
fog this morning, then patchy fog this afternoon. Vsby 1 NM or
less.
.TONIGHT...SW winds around 10 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: SW 1 foot at 4 seconds and E 1 foot at
9 seconds. Patchy fog in the evening, then areas of fog after
midnight. Vsby 1 NM or less.
.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
9 seconds. Areas of 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 around 2 ft. Wave Detail: SW 2 ft at 4 seconds and
E 1 foot at 8 seconds.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot
at 8 seconds.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave
Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. A chance
of showers.
.FRI...SW winds 5 to 10 kt. Seas around 2 ft. A chance of
showers.
.FRI NIGHT THROUGH SAT NIGHT...SE 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.

$$

ANZ235-212100-
Rhode Island Sound-
404 AM EDT Tue May 21 2024

.TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt this afternoon. Seas around 2 ft. Wave Detail:
SW 2 ft at 3 seconds and SE 2 ft at 9 seconds. Areas of dense fog
this morning, then patchy fog this afternoon. Vsby 1 NM or less.
.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at
10 seconds. Patchy fog in the evening, then areas of dense fog
after midnight. Vsby 1 NM or less.
.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds.
Patchy 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 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE
1 foot at 8 seconds.
.THU AND THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot
at 8 seconds. A chance of showers.
.FRI...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 4 seconds and SE 1 foot at 8 seconds. A chance of
showers.
.FRI NIGHT THROUGH SAT NIGHT...SE 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.

$$

ANZ237-212100-
Block Island Sound-
404 AM EDT Tue May 21 2024

.TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt this
afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds
and SW 1 foot at 3 seconds. Areas of dense fog this morning, then
patchy fog this afternoon. Vsby 1 NM or less.
.TONIGHT...SW winds around 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 9 seconds and SW 1 foot at 4 seconds. Patchy fog in
the evening, then areas of fog after midnight. Vsby 1 NM or less.
.WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at
9 seconds. Patchy 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 3 ft. Wave Detail: SW 2 ft at 4 seconds and E
2 ft at 9 seconds.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
8 seconds. A chance of showers in the afternoon.
.THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at
4 seconds and SE 1 foot at 8 seconds. Showers likely with a
chance of tstms in the evening, then a chance of showers after
midnight.
.FRI THROUGH SAT NIGHT...SE 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.

$$

ANZ230-212100-
Boston Harbor-
404 AM EDT Tue May 21 2024

.TODAY...S winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft this afternoon. Patchy fog this morning with vsby 1 to 3 NM.
.TONIGHT...SW winds around 10 kt. Waves around 2 ft.
.WED...SW winds 10 to 15 kt. Waves around 2 ft.
.WED NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft in the evening, then 1 foot or less.
.THU...SW winds around 10 kt. Waves 1 foot or less. A chance of
showers in the afternoon.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. Showers
likely with a chance of tstms in the evening, then a chance of
showers after midnight.
.FRI THROUGH SAT NIGHT...SE 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.

$$

ANZ236-212100-
Narragansett Bay-
404 AM EDT Tue May 21 2024

.TODAY...S winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft this afternoon. Areas of dense fog this morning with vsby
1 NM or less.
.TONIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Patchy fog
after midnight with vsby 1 NM or less.
.WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Waves around 2 ft. Patchy 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. Waves around 2 ft.
.THU...SW winds 10 to 15 kt. Waves around 2 ft. A chance of
showers in the afternoon.
.THU NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Showers
likely with a chance of tstms in the evening, then a chance of
showers after midnight.
.FRI THROUGH SAT NIGHT...SE 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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