571
FZUS51 KBOX 162005
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Mon Sep 16 2024

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

ANZ200-170900-
404 PM EDT Mon Sep 16 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres over New England will continue to provide dry, tranquil
boating weather through much of Wed. Low pres near the Carolinas and
mid-Atlantic coast then spreads a period of enhanced onshore
easterly winds, building seas and periods of rain late Wed and into
Thurs. High pres then returns for Fri into the weekend, with a
continued enhanced east-northeast breeze.

$$

ANZ250-170900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
404 PM EDT Mon Sep 16 2024

.TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 3 seconds and E 2 ft at 8 seconds.
.TUE...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds and SW 1 foot at 3 seconds.
.TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds and S 1 foot at 2 seconds.
.WED...SE 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.
.WED NIGHT AND THU...NE winds 5 to 10 kt. Seas 2 to 4 ft. Wave
Detail: SE 4 ft at 11 seconds and NE 2 ft at 4 seconds. A chance
of showers.
.THU NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 3 to 5 ft. Wave Detail: E 4 ft at 8 seconds and SE
4 ft at 10 seconds. A chance of showers.
.FRI...NE winds around 15 kt with gusts up to 25 kt. Seas 5 to
7 ft. A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...NE winds 15 to 20 kt with gusts up
to 25 kt. Seas 6 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.

$$

ANZ251-170900-
Massachusetts Bay and Ipswich Bay-
404 PM EDT Mon Sep 16 2024

.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and SE 1 foot at 3 seconds.
.TUE...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds and SW 1 foot at 3 seconds.
.TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and SE 1 foot at 2 seconds.
.WED...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds and S 1 foot at 2 seconds.
.WED NIGHT THROUGH THU NIGHT...NE winds 10 to 15 kt. Seas 2 to
4 ft. Wave Detail: E 4 ft at 10 seconds and NE 2 ft at 3 seconds.
A chance of showers.
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft. Wave Detail: E 5 ft at 8 seconds and SE 2 ft at 9 seconds.
A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...NE winds 15 to 20 kt with gusts up
to 25 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.

$$

ANZ231-170900-
Cape Cod Bay-
404 PM EDT Mon Sep 16 2024

.TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
1 foot or less. Wave Detail: S 1 foot at 2 seconds and E 1 foot
at 7 seconds.
.TUE...SW winds around 5 kt, becoming S in the afternoon. Seas
1 foot or less. Wave Detail: SW 1 foot at 3 seconds and E 1 foot
at 7 seconds.
.TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft in the evening,
then 1 foot or less. Wave Detail: SE 2 ft at 8 seconds and S
1 foot at 2 seconds, becoming S 1 foot at 2 seconds and E 1 foot
at 7 seconds.
.WED...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. A chance of showers in
the afternoon.
.WED NIGHT THROUGH THU NIGHT...NE winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and E
3 ft at 9 seconds. A chance of showers. Vsby 1 to 3 NM.
.FRI...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to
5 ft. Wave Detail: NE 3 ft at 8 seconds and N 2 ft at 3 seconds.
A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...NE winds 15 to 20 kt with gusts up
to 25 kt. Seas 4 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.

$$

ANZ254-170900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
404 PM EDT Mon Sep 16 2024

.TONIGHT...S winds 5 to 10 kt, diminishing to around 5 kt after
midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds.
.TUE...SE winds around 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds and E 1 foot at 12 seconds.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds and SE 1 foot at 12 seconds.
.WED...E winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft
at 8 seconds and SE 2 ft at 12 seconds. A chance of showers in
the afternoon.
.WED NIGHT...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail:
SE 3 ft at 8 seconds and SE 2 ft at 11 seconds. A chance of
showers in the evening. Showers likely after midnight. Vsby 1 to
3 NM.
.THU AND THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 6 ft. Wave Detail: NE 4 ft at 7 seconds and SE 4 ft at
11 seconds. A chance of showers. Vsby 1 to 3 NM.
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to
7 ft. A chance of showers.
.FRI NIGHT THROUGH SAT 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.

$$

ANZ255-170900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
404 PM EDT Mon Sep 16 2024

.TONIGHT...SE winds around 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and E 2 ft at 7 seconds.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds and SE 1 foot at 12 seconds.
.WED...E winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft
at 8 seconds and SE 1 foot at 12 seconds. A chance of showers.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: SE
4 ft at 8 seconds and SE 2 ft at 11 seconds. Showers likely. Vsby
1 to 3 NM.
.THU...NE winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft
at 11 seconds and NE 1 foot at 3 seconds. A chance of showers.
.THU NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft. A chance of
showers.
.FRI...NE winds 15 to 20 kt. Seas 4 to 6 ft. A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...NE winds 15 to 20 kt with gusts up
to 25 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.

$$

ANZ256-170900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
404 PM EDT Mon Sep 16 2024

.TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds.
.TUE...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft
at 9 seconds and E 2 ft at 7 seconds.
.TUE NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE
4 ft at 9 seconds and SE 1 foot at 13 seconds.
.WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: SE 5 ft at 8 seconds and SE 1 foot at
13 seconds. A chance of showers. Vsby 1 to 3 NM in the afternoon.
.WED NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 4 to 6 ft. Wave Detail: SE 5 ft at 8 seconds and SE
1 foot at 12 seconds. Showers likely in the evening. A chance of
showers after midnight. Vsby 1 to 3 NM.
.THU AND THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 5 ft. Wave Detail: SE 4 ft at 11 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 4 to
6 ft. A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...NE winds 20 to 25 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.

$$

ANZ232-170900-
Nantucket Sound-
404 PM EDT Mon Sep 16 2024

.TONIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail: E
1 foot at 7 seconds and SE 1 foot at 8 seconds.
.TUE...SE winds around 5 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 9 seconds and E 1 foot at 7 seconds.
.TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 8 seconds and SE 1 foot at 2 seconds.
.WED...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 3 seconds and SE 2 ft at 8 seconds. A chance of showers in the
afternoon.
.WED NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 3 seconds and SE 2 ft at 8 seconds. A chance of showers
in the evening. Showers likely after midnight. Vsby 1 to 3 NM.
.THU AND THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. Wave Detail: E 2 ft at 3 seconds and SE 2 ft at
8 seconds. A chance of showers.
.FRI...NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers.
.FRI NIGHT THROUGH SAT 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.

$$

ANZ233-170900-
Vineyard Sound-
404 PM EDT Mon Sep 16 2024

.TONIGHT...SE winds around 5 kt. Seas around 2 ft this evening,
then 1 foot or less. Wave Detail: E 1 foot at 7 seconds and SE
1 foot at 9 seconds.
.TUE...SE winds around 5 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 9 seconds and E 1 foot at 7 seconds.
.TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 9 seconds and E 1 foot at 7 seconds.
.WED...E winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds
and E 1 foot at 2 seconds. A chance of showers.
.WED NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SE 2 ft at 8 seconds and E 1 foot at 3 seconds. A chance of
showers. Vsby 1 to 3 NM.
.THU AND THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and NE 1 foot
at 3 seconds. A chance of showers.
.FRI...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...NE winds 15 to 20 kt with gusts up
to 25 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.

$$

ANZ234-170900-
Buzzards Bay-
404 PM EDT Mon Sep 16 2024

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

$$

ANZ235-170900-
Rhode Island Sound-
404 PM EDT Mon Sep 16 2024

.TONIGHT...SE winds around 5 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 9 seconds and E 1 foot at 7 seconds.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and E 1 foot at 7 seconds. Patchy fog in the morning
with vsby 1 to 3 NM.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 9 seconds and SE 1 foot at 13 seconds.
.WED...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft
at 8 seconds and SE 1 foot at 13 seconds. A chance of showers.
.WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail:
SE 4 ft at 8 seconds and NE 1 foot at 3 seconds. A chance of
showers. Vsby 1 to 3 NM.
.THU AND THU NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: SE 4 ft at 7 seconds and NE 2 ft at 4 seconds. A chance
of showers.
.FRI...NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...NE winds 15 to 20 kt with gusts up
to 25 kt. Seas 4 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.

$$

ANZ237-170900-
Block Island Sound-
404 PM EDT Mon Sep 16 2024

.TONIGHT...SE winds around 5 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 9 seconds and E 1 foot at 7 seconds. Patchy fog after
midnight with vsby 1 to 3 NM.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and E 1 foot at 7 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds.
.WED...E winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and SE 1 foot
at 13 seconds. A chance of showers.
.WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail:
SE 4 ft at 8 seconds and NE 1 foot at 3 seconds. A chance of
showers. Vsby 1 to 3 NM.
.THU AND THU NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: SE 4 ft at 7 seconds and SE 2 ft at 11 seconds. A chance
of showers.
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...NE winds 15 to 20 kt with gusts up
to 25 kt. Seas 4 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.

$$

ANZ230-170900-
Boston Harbor-
404 PM EDT Mon Sep 16 2024

.TONIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.TUE...SW winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less.
.TUE NIGHT...S winds 5 to 10 kt. Waves 1 foot or less.
.WED...SE winds 5 to 10 kt. Waves 1 foot or less.
.WED NIGHT THROUGH THU NIGHT...N winds 5 to 10 kt. Waves 2 to
3 ft. A chance of showers.
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft. A chance of showers.
.FRI NIGHT THROUGH SAT 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.

$$

ANZ236-170900-
Narragansett Bay-
404 PM EDT Mon Sep 16 2024

.TONIGHT...S winds around 5 kt. Waves around 2 ft. Patchy fog
after midnight with vsby 1 NM or less.
.TUE...E winds around 5 kt, becoming SE around 5 kt in the
afternoon. Waves 2 to 3 ft. Patchy fog in the morning with vsby
1 NM or less.
.TUE NIGHT...SE winds around 5 kt. Waves 2 to 3 ft.
.WED...E winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers.
.WED NIGHT THROUGH THU NIGHT...NE winds 5 to 10 kt. Waves 2 to
3 ft. A chance of showers.
.FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft. A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...NE winds 10 to 15 kt with gusts up
to 25 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