316
FZUS51 KBOX 180805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
405 AM EDT Wed Sep 18 2024

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

ANZ200-182100-
405 AM EDT Wed Sep 18 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
Dense fog over the south coastal waters through mid-morning.
Otherwise expect calm/tranquil boating conditions for the first half
of the day. Seas then gradually rise over the south coastal waters
as low-pressure moves up The Mid-Atlantic coast into this evening.
Seas remain elevated through Thursday evening. SCY in effect.

$$

ANZ250-182100-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
405 AM EDT Wed Sep 18 2024

.TODAY...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and SW 1 foot at 3 seconds. Patchy fog. Vsby 1 to
3 NM.
.TONIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and SE 2 ft at
11 seconds. A chance of showers after midnight with vsby 1 NM or
less.
.THU...NE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft
at 10 seconds and NE 2 ft at 4 seconds. Showers likely. Vsby 1 NM
or less in the morning.
.THU NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E
6 ft at 8 seconds and NE 2 ft at 4 seconds. A chance of showers.
.FRI...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to
8 ft. Wave Detail: E 7 ft at 9 seconds and NE 1 foot at
4 seconds. A chance of showers in the morning.
.FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
7 to 8 ft. Wave Detail: E 7 ft at 9 seconds and NE 1 foot at
4 seconds.
.SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to
25 kt. Seas 6 to 9 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.

$$

ANZ251-182100-
Massachusetts Bay and Ipswich Bay-
405 AM EDT Wed Sep 18 2024

.TODAY...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and SW 1 foot at 2 seconds. Patchy fog this
morning with vsby 1 to 3 NM.
.TONIGHT...SE winds 5 to 10 kt, becoming NE after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and E 2 ft at
11 seconds. A chance of showers after midnight with vsby 1 NM or
less.
.THU...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: E 4 ft at 10 seconds and NE 3 ft at 4 seconds.
Showers likely. Vsby 1 NM or less in the morning.
.THU NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E
5 ft at 8 seconds and NE 2 ft at 4 seconds. A chance of showers.
.FRI...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
7 ft. Wave Detail: E 7 ft at 9 seconds and SE 5 ft at 8 seconds.
A chance of showers in the morning.
.FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
6 to 7 ft. Wave Detail: E 7 ft at 9 seconds and NE 1 foot at
4 seconds.
.SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to
25 kt. Seas 6 to 8 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.

$$

ANZ231-182100-
Cape Cod Bay-
405 AM EDT Wed Sep 18 2024

.TODAY...SE winds 5 to 10 kt. Seas 1 foot or less, then around
2 ft this afternoon. Wave Detail: SW 1 foot at 2 seconds and SE
1 foot at 8 seconds, becoming SE 2 ft at 8 seconds and E 1 foot
at 2 seconds. Patchy fog this morning with vsby 1 to 3 NM.
.TONIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 9 seconds and E 1 foot at 2 seconds. Showers after
midnight with vsby 1 NM or less.
.THU...NE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft
at 10 seconds and NE 3 ft at 3 seconds. Showers. Vsby 1 to 3 NM
in the morning.
.THU NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 5 ft. Wave Detail: SE 4 ft at 8 seconds and E 4 ft at
9 seconds. Showers, mainly in the evening.
.FRI AND FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt.
Seas 4 to 6 ft. Wave Detail: E 5 ft at 8 seconds and N 3 ft at
4 seconds. A chance of showers.
.SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to
30 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds and NE
3 ft 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.

$$

ANZ254-182100-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
405 AM EDT Wed Sep 18 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH
THURSDAY EVENING...

.TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and SE 2 ft at 12 seconds. Patchy fog this morning
with vsby 1 to 3 NM.
.TONIGHT...E winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: SE
4 ft at 8 seconds and SE 2 ft at 11 seconds. A chance of showers
in the evening, then showers after midnight. Vsby 1 NM or less.
.THU...E winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to
7 ft. Wave Detail: SE 7 ft at 8 seconds and NE 4 ft at 5 seconds.
Showers. Vsby 1 to 3 NM.
.THU NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
6 to 7 ft. Wave Detail: E 6 ft at 7 seconds. Showers likely,
mainly in the evening with vsby 1 to 3 NM.
.FRI AND FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt.
Seas 6 to 8 ft. Wave Detail: E 8 ft at 8 seconds and SE 3 ft at
9 seconds. A chance of showers.
.SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to
25 kt. Seas 7 to 10 ft. Wave Detail: NE 9 ft at 9 seconds and SE
3 ft at 10 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.

$$

ANZ255-182100-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
405 AM EDT Wed Sep 18 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH
THURSDAY EVENING...

.TODAY...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE
4 ft at 8 seconds and SE 1 foot at 12 seconds. A slight chance of
showers this afternoon with vsby 1 NM or less.
.TONIGHT...E winds 10 to 15 kt, becoming NE 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft
at 8 seconds and SE 1 foot at 11 seconds. A chance of showers in
the evening, then showers after midnight. Vsby 1 NM or less,
increasing to 1 to 3 NM after midnight.
.THU...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: SE 6 ft at 10 seconds and NE 4 ft at
5 seconds. Showers. Vsby 1 to 3 NM.
.THU NIGHT...NE winds 15 to 20 kt. Gusts up to 30 kt in the
evening. Seas 5 to 7 ft. Wave Detail: E 5 ft at 8 seconds and S
1 foot at 7 seconds. A chance of showers. Vsby 1 to 3 NM in the
evening.
.FRI AND FRI NIGHT...NE winds 20 to 25 kt. Seas 5 to 7 ft. Wave
Detail: NE 6 ft at 8 seconds and NE 4 ft at 5 seconds. A chance
of showers.
.SAT...NE winds 20 to 25 kt. Seas 5 to 8 ft. Wave Detail: NE 6 ft
at 8 seconds and NE 4 ft at 5 seconds. A chance of showers.
.SAT NIGHT THROUGH SUN NIGHT...NE winds 20 to 25 kt. Seas 6 to
9 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.

$$

ANZ256-182100-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
405 AM EDT Wed Sep 18 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH
THURSDAY EVENING...

.TODAY...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE
4 ft at 8 seconds and SE 1 foot at 12 seconds. A slight chance of
showers this afternoon with vsby 1 NM or less.
.TONIGHT...E winds 10 to 15 kt, becoming NE 15 to 20 kt after
midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft
at 8 seconds and NE 2 ft at 4 seconds. A chance of showers in the
evening, then showers after midnight. Vsby 1 to 3 NM.
.THU...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to
7 ft. Wave Detail: NE 5 ft at 5 seconds and E 5 ft at 8 seconds.
Showers. Vsby 1 to 3 NM.
.THU NIGHT...NE winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. Gusts up to 30 kt. Seas 6 to 7 ft. Wave Detail: E
6 ft at 8 seconds and NE 5 ft at 5 seconds. A chance of showers.
Vsby 1 to 3 NM in the evening.
.FRI AND FRI NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt.
Seas 5 to 7 ft. Wave Detail: NE 6 ft at 5 seconds and E 5 ft at
8 seconds. A chance of showers.
.SAT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to
7 ft. Wave Detail: NE 6 ft at 7 seconds and SE 3 ft at 9 seconds.
A chance of showers.
.SAT NIGHT THROUGH SUN NIGHT...NE winds 20 to 25 kt with gusts up
to 30 kt. Seas 6 to 9 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.

$$

ANZ232-182100-
Nantucket Sound-
405 AM EDT Wed Sep 18 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY EVENING...

.TODAY...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and E 1 foot at 2 seconds.
.TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after midnight.
Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and SE 2 ft at
9 seconds. A chance of showers in the evening, then showers after
midnight. Vsby 1 to 3 NM.
.THU...NE winds 15 to 20 kt, increasing to 20 to 25 kt in the
afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft
at 4 seconds and SE 3 ft at 8 seconds. Showers. Vsby 1 to 3 NM.
.THU NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 5 ft. Wave Detail: NE 4 ft at 5 seconds and E 4 ft at
9 seconds. Showers likely, mainly in the evening with vsby 1 to
3 NM.
.FRI AND FRI NIGHT...NE winds around 20 kt with gusts up to
25 kt. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 4 seconds and E
3 ft at 8 seconds. A chance of showers.
.SAT THROUGH SUN NIGHT...NE winds 20 to 25 kt. Seas 4 to 6 ft.
Wave Detail: E 5 ft at 10 seconds and NE 4 ft 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.

$$

ANZ233-182100-
Vineyard Sound-
405 AM EDT Wed Sep 18 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY EVENING...

.TODAY...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and E 1 foot at 2 seconds. Patchy fog this
morning with vsby 1 to 3 NM.
.TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and E
1 foot at 2 seconds. A chance of showers in the evening, then
showers after midnight. Vsby 1 to 3 NM in the evening.
.THU...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft. Wave Detail: SE 3 ft at 9 seconds and NE 2 ft at 3 seconds.
Showers. Vsby 1 to 3 NM in the afternoon.
.THU NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SE 3 ft at
8 seconds. A chance of showers.
.FRI AND FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and E 3 ft at
8 seconds. A chance of showers.
.SAT THROUGH SUN NIGHT...NE winds 20 to 25 kt with gusts up to
30 kt. Seas 3 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and E
3 ft at 9 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.

$$

ANZ234-182100-
Buzzards Bay-
405 AM EDT Wed Sep 18 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY EVENING...

.TODAY...E winds 5 to 10 kt. Seas 1 foot or less, then around
2 ft this afternoon. Wave Detail: E 1 foot at 2 seconds and SE
1 foot at 8 seconds, becoming SE 2 ft at 8 seconds and E 1 foot
at 2 seconds. Patchy fog this morning with vsby 1 to 3 NM.
.TONIGHT...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 8 seconds and E 1 foot at 2 seconds. A chance of
showers in the evening, then showers after midnight with vsby
1 to 3 NM.
.THU...NE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE
3 ft at 9 seconds and NE 2 ft at 3 seconds. Showers. Vsby 1 to
3 NM in the morning.
.THU NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SE 3 ft at
8 seconds. Showers likely, mainly in the evening.
.FRI AND FRI NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt.
Seas 3 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and E 3 ft at
8 seconds. A chance of showers.
.SAT AND SAT NIGHT...NE winds around 20 kt with gusts up to
30 kt. Seas 3 to 5 ft. Wave Detail: NE 3 ft at 4 seconds and E
3 ft at 8 seconds.
.SUN...NE winds around 20 kt with gusts up to 30 kt. Seas 4 to
6 ft.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 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.

$$

ANZ235-182100-
Rhode Island Sound-
405 AM EDT Wed Sep 18 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY EVENING...

.TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and E 1 foot at 2 seconds.
.TONIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and
NE 2 ft at 3 seconds. A chance of showers in the evening, then
showers after midnight. Vsby 1 to 3 NM in the evening.
.THU...NE winds 15 to 20 kt, increasing to 20 to 25 kt in the
afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SE
5 ft at 8 seconds and NE 3 ft at 4 seconds. Showers. Vsby 1 to
3 NM in the afternoon.
.THU NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt,
diminishing to 15 to 20 kt after midnight. Seas 4 to 6 ft. Wave
Detail: SE 5 ft at 8 seconds and NE 4 ft at 4 seconds. A chance
of showers.
.FRI AND FRI NIGHT...NE winds 20 to 25 kt. Seas 4 to 5 ft. Wave
Detail: NE 4 ft at 4 seconds and SE 4 ft at 8 seconds. A chance
of showers.
.SAT THROUGH SUN NIGHT...NE winds 20 to 25 kt with gusts up to
30 kt. Seas 4 to 6 ft. Wave Detail: NE 4 ft at 4 seconds and E
4 ft at 8 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.

$$

ANZ237-182100-
Block Island Sound-
405 AM EDT Wed Sep 18 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY EVENING...

.TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and SE 1 foot at 13 seconds.
.TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and
NE 2 ft at 3 seconds. A chance of showers in the evening, then
showers after midnight.
.THU...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: SE 5 ft at 8 seconds and NE 3 ft at 4 seconds.
Showers. Vsby 1 to 3 NM in the afternoon.
.THU NIGHT...NE winds 15 to 20 kt. Gusts up to 30 kt, decreasing
to 20 kt after midnight. Seas 4 to 6 ft. Wave Detail: E 5 ft at
8 seconds and NE 3 ft at 5 seconds. A chance of showers.
.FRI AND FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt.
Seas 4 to 5 ft. Wave Detail: E 4 ft at 8 seconds and NE 3 ft at
5 seconds. A chance of showers.
.SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to
30 kt. Seas 4 to 6 ft. Wave Detail: E 4 ft at 7 seconds and E
2 ft at 11 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.

$$

ANZ230-182100-
Boston Harbor-
405 AM EDT Wed Sep 18 2024

.TODAY...S winds around 5 kt, becoming E this afternoon. Waves
1 foot or less. Patchy fog this morning with vsby 1 to 3 NM.
.TONIGHT...E winds 5 to 10 kt, becoming NE after midnight. Waves
1 foot or less. A chance of showers after midnight with vsby 1 NM
or less.
.THU...NE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 2 to 3 ft. Showers likely. Vsby 1 to 3 NM in the morning.
.THU NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Waves 2 to 3 ft. Showers likely, mainly in the evening.
.FRI...NE winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to
3 ft, except 4 to 6 ft at the outer harbor entrance. A chance of
showers in the morning.
.FRI NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Waves
2 to 3 ft, except 4 to 6 ft at the outer harbor entrance.
.SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to
20 kt. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor
entrance.

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.

$$

ANZ236-182100-
Narragansett Bay-
405 AM EDT Wed Sep 18 2024

.TODAY...E winds 5 to 10 kt. Waves 2 to 3 ft. Patchy fog this
morning with vsby 1 to 3 NM.
.TONIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. Showers likely
after midnight.
.THU...NE winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to
3 ft. Showers. Vsby 1 to 3 NM in the afternoon.
.THU NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Waves
2 to 3 ft. Showers likely, mainly in the evening.
.FRI AND FRI NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt.
Waves 2 to 3 ft. A chance of showers.
.SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to
25 kt. Waves 2 to 3 ft, except 4 to 6 ft at the bay entrance.

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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