662
FZUS51 KBOX 200804
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 AM EDT Fri Sep 20 2024

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

ANZ200-202100-
404 AM EDT Fri Sep 20 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
Low pres SE of Nantucket will continue to combine with high pres
over SE Quebec to generate gusty NE winds and building seas with
periods of rain into early Sun. This low pres then move farther out
to sea as high pres moves S from Quebec. Improving weather Sun into
early next week.

$$

ANZ250-202100-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
404 AM EDT Fri Sep 20 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.TODAY...NE winds 20 to 25 kt with gusts up to 35 kt. Seas 7 to
9 ft, building to 8 to 11 ft this afternoon. Wave Detail: E 8 ft
at 9 seconds and NE 4 ft at 5 seconds, becoming E 8 ft at
9 seconds and NE 6 ft at 6 seconds. Showers likely. Vsby 1 to
3 NM.
.TONIGHT...NE winds around 25 kt with gusts up to 35 kt. Seas
9 to 11 ft. Wave Detail: E 10 ft at 10 seconds and NE 6 ft at
7 seconds. Showers likely, mainly in the evening with vsby 1 to
3 NM.
.SAT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 8 to
11 ft. Wave Detail: E 10 ft at 10 seconds and N 5 ft at
6 seconds. A chance of showers.
.SAT NIGHT...NE winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. Gusts up to 30 kt. Seas 7 to 9 ft. Wave Detail: E
9 ft at 9 seconds and NE 4 ft at 7 seconds. A chance of showers.
.SUN AND SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt.
Seas 7 to 9 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot
at 5 seconds.
.MON THROUGH TUE...E winds 10 to 15 kt with gusts up to 20 kt.
Seas 5 to 8 ft. Wave Detail: E 8 ft at 11 seconds and NE 1 foot
at 3 seconds.
.TUE NIGHT...E winds around 10 kt. Seas 5 to 6 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.

$$

ANZ251-202100-
Massachusetts Bay and Ipswich Bay-
404 AM EDT Fri Sep 20 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.TODAY...NE winds 15 to 20 kt, increasing to 20 to 25 kt this
afternoon. Gusts up to 30 kt. Seas 5 to 8 ft. Wave Detail: E 8 ft
at 9 seconds and NE 5 ft at 6 seconds. A chance of showers. Vsby
1 to 3 NM.
.TONIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to
9 ft. Wave Detail: E 9 ft at 9 seconds and NE 5 ft at 6 seconds.
A chance of showers. Vsby 1 to 3 NM in the evening.
.SAT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to
9 ft. Wave Detail: E 9 ft at 10 seconds and NE 5 ft at 6 seconds.
A chance of showers.
.SAT 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 3 ft at
6 seconds. A chance of showers.
.SUN AND SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 6 to 8 ft. Wave Detail: E 7 ft at 10 seconds and NE 2 ft at
4 seconds.
.MON AND MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt.
Seas 5 to 7 ft. Wave Detail: E 7 ft at 10 seconds and NE 1 foot
at 4 seconds.
.TUE AND TUE NIGHT...E winds around 10 kt. Seas 4 to 6 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.

$$

ANZ231-202100-
Cape Cod Bay-
404 AM EDT Fri Sep 20 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.TODAY...NE winds 20 to 25 kt with gusts up to 40 kt. Seas 4 to
6 ft, building to 5 to 8 ft this afternoon. Wave Detail: E 6 ft
at 8 seconds and N 4 ft at 4 seconds, becoming E 6 ft at
9 seconds and N 5 ft at 5 seconds. Showers likely. Vsby 1 to
3 NM.
.TONIGHT...NE winds 20 to 25 kt with gusts up to 40 kt. Seas 5 to
8 ft. Wave Detail: E 7 ft at 9 seconds and N 6 ft at 5 seconds.
Showers likely. Vsby 1 to 3 NM in the evening.
.SAT...NE winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to
8 ft. Wave Detail: E 7 ft at 9 seconds and N 6 ft at 6 seconds.
Showers likely. Vsby 1 to 3 NM.
.SAT NIGHT...NE winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail:
NE 6 ft at 9 seconds and N 5 ft at 6 seconds. Showers likely,
mainly in the evening.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
6 ft. Wave Detail: E 5 ft at 10 seconds and N 4 ft at 6 seconds.
A chance of showers in the morning.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas
5 to 6 ft. Wave Detail: E 5 ft at 10 seconds and N 3 ft at
4 seconds.
.MON AND MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 6 ft.
.TUE AND TUE NIGHT...E winds around 10 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.

$$

ANZ254-202100-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
404 AM EDT Fri Sep 20 2024

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.TODAY...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 9 to
12 ft. Wave Detail: NE 11 ft at 9 seconds and N 4 ft at
5 seconds. Showers. Vsby 1 to 3 NM.
.TONIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas
10 to 13 ft. Wave Detail: NE 12 ft at 10 seconds and N 5 ft at
6 seconds. Showers. Vsby 1 to 3 NM.
.SAT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 9 to
12 ft. Wave Detail: NE 12 ft at 10 seconds and N 3 ft at
5 seconds. Showers likely. Vsby 1 to 3 NM.
.SAT NIGHT...NE winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. Gusts up to 30 kt. Seas 8 to 10 ft. Wave Detail:
NE 10 ft at 9 seconds and NE 3 ft at 5 seconds. A chance of
showers.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 8 to
10 ft. Wave Detail: E 9 ft at 10 seconds and NE 2 ft at
5 seconds. A chance of showers.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
8 to 10 ft. Wave Detail: E 9 ft at 10 seconds and NE 1 foot at
4 seconds.
.MON AND MON NIGHT...NE winds 15 to 20 kt, diminishing to 10 to
15 kt. Gusts up to 25 kt. Seas 7 to 10 ft.
.TUE AND TUE NIGHT...E winds 10 to 15 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.

$$

ANZ255-202100-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
404 AM EDT Fri Sep 20 2024

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.TODAY...NE winds 25 to 35 kt with gusts up to 40 kt. Seas 8 to
11 ft. Wave Detail: NE 9 ft at 7 seconds. Showers. Vsby 1 to
3 NM.
.TONIGHT...N winds 25 to 30 kt with gusts up to 40 kt. Seas 8 to
11 ft. Wave Detail: E 10 ft at 9 seconds and N 5 ft at 6 seconds.
Showers likely. Vsby 1 to 3 NM.
.SAT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 7 to
10 ft. Wave Detail: E 10 ft at 10 seconds and N 5 ft at
6 seconds. Showers likely. Vsby 1 to 3 NM in the morning.
.SAT NIGHT...NE winds 25 to 30 kt, diminishing to 20 to 25 kt
after midnight. Seas 6 to 9 ft. Wave Detail: E 9 ft at 9 seconds
and N 4 ft at 5 seconds. Showers likely, mainly in the evening.
.SUN...NE winds 20 to 25 kt. Seas 6 to 9 ft. Wave Detail: E 8 ft
at 10 seconds and NE 4 ft at 5 seconds. A chance of showers.
.SUN NIGHT...NE winds around 20 kt with gusts up to 25 kt. Seas
6 to 9 ft. Wave Detail: E 8 ft at 11 seconds and NE 3 ft at
5 seconds.
.MON AND MON NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt.
Seas 6 to 9 ft.
.TUE AND TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 7 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.

$$

ANZ256-202100-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
404 AM EDT Fri Sep 20 2024

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.TODAY...N winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to
9 ft. Wave Detail: E 6 ft at 8 seconds and N 5 ft at 5 seconds. A
chance of showers. Vsby 1 to 3 NM this afternoon.
.TONIGHT...N winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to
9 ft. Wave Detail: N 6 ft at 6 seconds and E 6 ft at 9 seconds. A
chance of showers. Vsby 1 to 3 NM in the evening.
.SAT...N winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 6 to 9 ft. Wave Detail: N 6 ft at 6 seconds and E
6 ft at 10 seconds. A chance of showers.
.SAT NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas
5 to 8 ft. Wave Detail: E 6 ft at 9 seconds and N 5 ft at
5 seconds. A chance of showers.
.SUN...NE winds 20 to 25 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft
at 10 seconds and NE 4 ft at 5 seconds. A chance of showers in
the morning.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
6 to 8 ft. Wave Detail: E 7 ft at 10 seconds and NE 3 ft at
5 seconds.
.MON THROUGH TUE...NE winds 15 to 20 kt. Seas 5 to 7 ft.
.TUE NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 6 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.

$$

ANZ232-202100-
Nantucket Sound-
404 AM EDT Fri Sep 20 2024

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.TODAY...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to
7 ft. Wave Detail: N 5 ft at 5 seconds and E 5 ft at 9 seconds.
Showers. Vsby 1 to 3 NM.
.TONIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to
7 ft. Wave Detail: E 5 ft at 9 seconds and N 4 ft at 5 seconds.
Showers likely. Vsby 1 to 3 NM in the evening.
.SAT...NE winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Gusts up to 40 kt. Seas 5 to 7 ft. Wave Detail: E 5 ft
at 10 seconds and N 4 ft at 5 seconds. Showers likely. Vsby 1 to
3 NM in the morning.
.SAT NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas
4 to 6 ft. Wave Detail: N 4 ft at 5 seconds and E 4 ft at
10 seconds. Showers likely, mainly in the evening.
.SUN...NE winds 20 to 25 kt. Seas 4 to 6 ft. Wave Detail: N 4 ft
at 4 seconds and E 3 ft at 10 seconds. A chance of showers.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft. Wave Detail: E 4 ft at 10 seconds and NE 3 ft at
4 seconds.
.MON AND MON NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt.
Seas 4 to 6 ft.
.TUE AND TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 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.

$$

ANZ233-202100-
Vineyard Sound-
404 AM EDT Fri Sep 20 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.TODAY...NE winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to
6 ft. Wave Detail: N 3 ft at 5 seconds and E 3 ft at 8 seconds.
Showers likely. Vsby 1 to 3 NM.
.TONIGHT...N winds 20 to 25 kt with gusts up to 40 kt. Seas 4 to
6 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at 9 seconds.
Showers likely. Vsby 1 to 3 NM in the evening.
.SAT...N winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at 10 seconds.
Showers likely.
.SAT NIGHT...NE winds 15 to 20 kt. Gusts up to 30 kt in the
evening. Seas 3 to 5 ft. Wave Detail: N 3 ft at 5 seconds and E
2 ft at 10 seconds. Showers likely, mainly in the evening.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: NE 2 ft at 4 seconds and E 2 ft at 10 seconds.
A chance of showers in the morning.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft. Wave Detail: NE 2 ft at 4 seconds and E 2 ft at
10 seconds.
.MON THROUGH TUE NIGHT...E winds 10 to 15 kt with gusts up to
20 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.

$$

ANZ234-202100-
Buzzards Bay-
404 AM EDT Fri Sep 20 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.TODAY...NE winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to
6 ft. Wave Detail: N 3 ft at 5 seconds and E 3 ft at 8 seconds.
Showers likely. Vsby 1 to 3 NM this afternoon.
.TONIGHT...N winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to
6 ft. Wave Detail: N 3 ft at 5 seconds and E 3 ft at 9 seconds. A
chance of showers in the evening, then showers likely after
midnight. Vsby 1 to 3 NM in the evening.
.SAT...N winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: N 3 ft at 5 seconds and E 3 ft at 10 seconds.
Showers likely.
.SAT NIGHT...NE winds 15 to 20 kt. Gusts up to 30 kt in the
evening. Seas 3 to 5 ft. Wave Detail: N 3 ft at 5 seconds and E
3 ft at 10 seconds. Showers likely, mainly in the evening.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft. Wave Detail: E 3 ft at 10 seconds and N 2 ft at 4 seconds.
A chance of showers in the morning.
.SUN NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: E
3 ft at 10 seconds and NE 2 ft at 4 seconds.
.MON AND MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 5 ft.
.TUE AND TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt. Seas
2 to 4 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.

$$

ANZ235-202100-
Rhode Island Sound-
404 AM EDT Fri Sep 20 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.TODAY...N winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to
6 ft. Wave Detail: N 4 ft at 5 seconds and SE 3 ft at 8 seconds.
A chance of showers.
.TONIGHT...N winds 20 to 25 kt with gusts up to 40 kt. Seas 4 to
6 ft. Wave Detail: N 5 ft at 5 seconds and SE 3 ft at 9 seconds.
A chance of showers. Vsby 1 to 3 NM in the evening.
.SAT...N winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to
6 ft. Wave Detail: N 5 ft at 5 seconds and SE 3 ft at 9 seconds.
A chance of showers.
.SAT NIGHT...N winds 20 to 25 kt with gusts up to 30 kt, becoming
NE 15 to 20 kt after midnight. Seas 4 to 5 ft. Wave Detail: N
4 ft at 5 seconds and SE 3 ft at 9 seconds. A chance of showers.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
5 ft. Wave Detail: NE 4 ft at 5 seconds and E 3 ft at 10 seconds.
A chance of showers in the morning.
.SUN NIGHT...NE winds 15 to 20 kt. Seas 4 to 5 ft. Wave Detail:
NE 4 ft at 5 seconds and SE 3 ft at 11 seconds.
.MON THROUGH TUE NIGHT...E winds 15 to 20 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.

$$

ANZ237-202100-
Block Island Sound-
404 AM EDT Fri Sep 20 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.TODAY...N winds 15 to 20 kt, increasing to 20 to 25 kt this
afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: E 4 ft
at 8 seconds and N 3 ft at 5 seconds. A chance of showers.
.TONIGHT...N winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to
6 ft. Wave Detail: N 4 ft at 5 seconds and E 4 ft at 9 seconds. A
chance of showers.
.SAT...N winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: E 4 ft at 9 seconds and N 3 ft at 5 seconds. A
chance of showers.
.SAT NIGHT...NE winds 15 to 20 kt. Gusts up to 30 kt, decreasing
to 20 kt after midnight. Seas 3 to 5 ft. Wave Detail: E 4 ft at
9 seconds and N 3 ft at 5 seconds. A chance of showers.
.SUN AND SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt.
Seas 3 to 5 ft. Wave Detail: E 4 ft at 9 seconds and NE 3 ft at
5 seconds.
.MON THROUGH TUE NIGHT...E winds 10 to 15 kt with gusts up to
20 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and E
3 ft at 5 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.

$$

ANZ230-202100-
Boston Harbor-
404 AM EDT Fri Sep 20 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.TODAY...NE winds 15 to 20 kt with gusts up to 30 kt. Waves 2 to
3 ft. A chance of showers. Vsby 1 to 3 NM.
.TONIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Waves
2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. A
chance of showers. Vsby 1 to 3 NM in the evening.
.SAT...NE winds 15 to 20 kt with gusts up to 30 kt. Waves around
2 ft, except 4 to 6 ft at the outer harbor entrance. A chance of
showers.
.SAT NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 10 to 15 kt after midnight. Waves 2 to 3 ft,
except 4 to 6 ft at the outer harbor entrance. A chance of
showers.
.SUN AND 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.
.MON THROUGH TUE NIGHT...E winds 5 to 10 kt. Waves 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.

$$

ANZ236-202100-
Narragansett Bay-
404 AM EDT Fri Sep 20 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.TODAY...N winds 15 to 20 kt with gusts up to 30 kt. Waves 2 to
3 ft. A chance of showers.
.TONIGHT...N winds 15 to 20 kt with gusts up to 30 kt. Waves 2 to
3 ft. A chance of showers.
.SAT...N winds 15 to 20 kt with gusts up to 30 kt. Waves 2 to
3 ft. A chance of showers.
.SAT NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Waves
2 to 3 ft. A chance of showers.
.SUN AND SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 3 ft.
.MON THROUGH TUE NIGHT...E winds 10 to 15 kt with gusts up to
20 kt. Waves 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.

$$

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
www.facebook.com/NWSBoston

You can follow us on Twitter at
@NWSBoston