431
FZUS51 KBOX 210204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 PM EDT Mon May 20 2024

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

ANZ200-211500-
1003 PM EDT Mon May 20 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres over the south coastal waters will drift south
through Wed with a persistent SW flow setting up over the waters. A
cold front moves into New Eng Thu, then a second cold front
approaches from the north Fri, moving across the waters Fri night.
High pres builds over New Eng and the waters Sat.

$$

ANZ250-211500-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1003 PM EDT Mon May 20 2024

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

$$

ANZ251-211500-
Massachusetts Bay and Ipswich Bay-
1003 PM EDT Mon May 20 2024

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

$$

ANZ231-211500-
Cape Cod Bay-
1003 PM EDT Mon May 20 2024

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

$$

ANZ254-211500-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1003 PM EDT Mon May 20 2024

.OVERNIGHT...SE winds around 5 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 8 seconds. Areas of fog, then patchy fog. Vsby 1 NM or
less.
.TUE...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 9 seconds and SW 1 foot at 4 seconds. Patchy fog. Vsby 1 NM or
less, increasing to 1 to 3 NM in the afternoon.
.TUE NIGHT...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 3 ft at
4 seconds. Patchy fog after midnight with vsby 1 to 3 NM.
.WED...SW winds 10 to 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 8 seconds.
.WED NIGHT AND 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 after midnight.
.FRI...SW winds around 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.

$$

ANZ255-211500-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1003 PM EDT Mon May 20 2024

.OVERNIGHT...E winds 5 to 10 kt, diminishing to around 5 kt. Seas
2 to 4 ft. Wave Detail: E 4 ft at 8 seconds and NE 1 foot at
3 seconds. Areas of fog, then patchy fog. Vsby 1 NM or less.
.TUE...SW winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds.
Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM in the
afternoon.
.TUE NIGHT...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 3 seconds. Patchy fog after midnight.
.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.
Patchy fog in the morning with vsby 1 to 3 NM.
.WED NIGHT AND 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 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds
and E 1 foot at 8 seconds. A chance of showers after midnight.
.FRI...SW winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers.
.FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 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.

$$

ANZ256-211500-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1003 PM EDT Mon May 20 2024

.OVERNIGHT...SE winds around 5 kt, becoming SW around 5 kt. Seas
2 to 3 ft. Wave Detail: E 3 ft at 8 seconds. Areas of fog, then
patchy fog. Vsby 1 NM or less.
.TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds. Patchy fog in the morning with vsby 1 NM or less.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds and SW 2 ft at 4 seconds. Patchy fog after
midnight with 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.
Patchy fog in the morning with vsby 1 NM or less.
.WED NIGHT AND THU...SW winds 10 to 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 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds
and E 1 foot at 8 seconds. A chance of showers after midnight.
.FRI...SW winds around 10 kt. Seas 2 to 4 ft. A chance of
showers.
.FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 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.

$$

ANZ232-211500-
Nantucket Sound-
1003 PM EDT Mon May 20 2024

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

$$

ANZ233-211500-
Vineyard Sound-
1003 PM EDT Mon May 20 2024

.OVERNIGHT...SE winds around 5 kt, becoming SW. Seas around 2 ft.
Wave Detail: NE 1 foot at 2 seconds and E 1 foot at 9 seconds.
Areas of fog, then patchy fog. Vsby 1 NM or less.
.TUE...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E
1 foot at 9 seconds. Patchy fog in the morning with vsby 1 NM or
less.
.TUE NIGHT...SW winds around 10 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and
E 1 foot at 9 seconds. Patchy fog after midnight.
.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 AND 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 9 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 5 seconds and
SE 1 foot at 8 seconds. A chance of showers after midnight.
.FRI...SW winds 10 to 15 kt. Seas around 2 ft. A chance of
showers.
.FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 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.

$$

ANZ234-211500-
Buzzards Bay-
1003 PM EDT Mon May 20 2024

.OVERNIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail:
NE 1 foot at 2 seconds and E 1 foot at 8 seconds. Areas of fog,
then patchy fog. Vsby 1 NM or less.
.TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with 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 9 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.TUE NIGHT...SW winds around 10 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.
.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 AND THU...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 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 5 seconds and
SE 1 foot at 8 seconds. A chance of showers after midnight.
.FRI...SW winds 10 to 15 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.

$$

ANZ235-211500-
Rhode Island Sound-
1003 PM EDT Mon May 20 2024

.OVERNIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 8 seconds and NE 1 foot at 2 seconds. Areas of fog,
then patchy fog. Vsby 1 NM or less.
.TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and SE 2 ft at 9 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.TUE 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 SE 2 ft at
10 seconds. Patchy fog after midnight with vsby 1 to 3 NM.
.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 AND THU...SW winds around 15 kt with gusts up to
20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE
1 foot at 8 seconds.
.THU 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 5 seconds and SE
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 10 to 15 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.

$$

ANZ237-211500-
Block Island Sound-
1003 PM EDT Mon May 20 2024

.OVERNIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 8 seconds and E 1 foot at 3 seconds. Areas of fog, then
patchy fog. Vsby 1 NM or less.
.TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds
and SE 2 ft at 8 seconds. Patchy fog in the morning with vsby
1 NM or less.
.TUE NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SW 2 ft at 3 seconds and E 2 ft at 9 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 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 AND THU...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SW 2 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,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: SW 2 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. 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.

$$

ANZ230-211500-
Boston Harbor-
1003 PM EDT Mon May 20 2024

.OVERNIGHT...S winds 5 to 10 kt. Waves 1 foot or less. Patchy
fog. Vsby 1 to 3 NM, decreasing to 1 NM or less.
.TUE...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon. Patchy fog in the morning with vsby 1 to 3 NM.
.TUE NIGHT...SW winds around 10 kt. Waves around 2 ft.
.WED...SW winds 10 to 15 kt. Waves around 2 ft.
.WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Waves 1 foot or less. A chance of showers.
.FRI...W winds around 10 kt. Waves 1 foot or less. A chance of
showers.
.FRI NIGHT THROUGH SAT NIGHT...S winds 5 to 10 kt. Waves 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.

$$

ANZ236-211500-
Narragansett Bay-
1003 PM EDT Mon May 20 2024

.OVERNIGHT...S winds around 5 kt. Waves 1 foot or less. Areas of
fog, then patchy fog. Vsby 1 NM or less.
.TUE...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon. Patchy fog in the morning with vsby 1 NM or
less.
.TUE NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Patchy fog
after midnight.
.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 AND THU...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 3 ft.
.THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Waves 2 to 3 ft. A chance of showers.
.FRI...W winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.
.FRI NIGHT THROUGH SAT NIGHT...SE winds 5 to 10 kt. Waves 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.

$$

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