664
FZUS51 KBOX 162005
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
405 PM EDT Mon Jun 16 2025

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

ANZ200-170900-
405 PM EDT Mon Jun 16 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pressurewill move offshore Mon then another low pres will track
S of the waters Tue. Weak high pres builds into the waters Wed. A
cold front approaches the waters Thurs.

$$

ANZ250-170900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
405 PM EDT Mon Jun 16 2025

.TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds. Patchy fog. A slight chance of showers after
midnight. Vsby 1 NM or less.
.TUE...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.TUE NIGHT...SE winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
SE 3 ft at 6 seconds. A chance of showers after midnight.
.WED...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and S 2 ft at
4 seconds. Patchy fog in the morning. A chance of showers in the
morning with vsby 1 to 3 NM.
.WED NIGHT AND THU...S winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and SE 3 ft at
7 seconds.
.THU NIGHT...SW winds around 20 kt with gusts up to 30 kt. Seas
3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 3 ft at
8 seconds.
.FRI THROUGH SAT NIGHT...SW 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.

$$

ANZ251-170900-
Massachusetts Bay and Ipswich Bay-
405 PM EDT Mon Jun 16 2025

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

$$

ANZ231-170900-
Cape Cod Bay-
405 PM EDT Mon Jun 16 2025

.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
1 foot at 2 seconds and S 1 foot at 7 seconds. Patchy fog this
evening. A slight chance of showers after midnight. Vsby 1 NM or
less, increasing to 1 to 3 NM after midnight.
.TUE...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
1 foot at 2 seconds and S 1 foot at 7 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 4 seconds.
.WED...S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and SW 1 foot
at 2 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.WED NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 7 seconds and SW 1 foot at 3 seconds. A chance
of showers after midnight.
.THU AND THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at
7 seconds.
.FRI THROUGH SAT NIGHT...SW winds 15 to 20 kt with gusts up to
25 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.

$$

ANZ254-170900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
405 PM EDT Mon Jun 16 2025

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

$$

ANZ255-170900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
405 PM EDT Mon Jun 16 2025

.TONIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds. Patchy fog after midnight. A slight chance of
showers after midnight with vsby 1 to 3 NM.
.TUE...E winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog in
the morning with vsby 1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
3 to 4 ft. Wave Detail: S 3 ft at 7 seconds.
.WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: S 3 ft at 7 seconds.
Patchy fog in the morning with vsby 1 to 3 NM.
.WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S
3 ft at 6 seconds. A chance of showers after midnight.
.THU...SW 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: SW
4 ft at 5 seconds and SE 2 ft at 7 seconds. A chance of showers
in the morning.
.THU NIGHT...SW winds 20 to 25 kt. Seas 4 to 6 ft.
.FRI...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft.
.FRI NIGHT AND SAT...W winds 15 to 20 kt, diminishing to 10 to
15 kt. Seas 3 to 5 ft.
.SAT NIGHT...SW winds around 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.

$$

ANZ256-170900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
405 PM EDT Mon Jun 16 2025

.TONIGHT...E winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 7 seconds.
Patchy fog. A slight chance of showers after midnight. Vsby 1 NM
or less.
.TUE...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft
at 7 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
3 to 4 ft. Wave Detail: SE 3 ft at 7 seconds.
.WED...S winds 5 to 10 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: S 3 ft at 7 seconds.
Patchy fog in the morning with vsby 1 to 3 NM.
.WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail:
SW 3 ft at 4 seconds and SE 3 ft at 7 seconds. A chance of
showers and tstms.
.THU...SW 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: SW
4 ft at 4 seconds and SE 2 ft at 7 seconds. A chance of showers
in the morning.
.THU NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas
4 to 5 ft.
.FRI THROUGH SAT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 5 ft.
.SAT NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas
2 to 4 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.

$$

ANZ232-170900-
Nantucket Sound-
405 PM EDT Mon Jun 16 2025

.TONIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 4 seconds and S 1 foot at 7 seconds. Patchy fog. A slight
chance of showers after midnight. Vsby 1 NM or less, increasing
to 1 to 3 NM after midnight.
.TUE...E winds around 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 6 seconds.
.WED...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 E 2 ft at 7 seconds. Patchy fog in the morning with vsby 1 to
3 NM.
.WED NIGHT AND THU...SW winds 15 to 20 kt with gusts up to 25 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 through the day.
.THU NIGHT...SW winds around 20 kt with gusts up to 25 kt. Seas
around 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at
8 seconds.
.FRI THROUGH SAT NIGHT...SW winds 15 to 20 kt with gusts up to
25 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.

$$

ANZ233-170900-
Vineyard Sound-
405 PM EDT Mon Jun 16 2025

.TONIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy fog. A
slight chance of showers after midnight. Vsby 1 to 3 NM.
.TUE...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy fog in the
morning with vsby 1 to 3 NM.
.TUE NIGHT...SE winds around 5 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 6 seconds.
.WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and
SE 2 ft at 7 seconds. Patchy fog in the morning with vsby 1 to
3 NM.
.WED NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 4 seconds and SE 2 ft at 7 seconds. A chance of showers
and tstms.
.THU...SW 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: SW
3 ft at 4 seconds and SE 1 foot at 7 seconds. A chance of showers
in the morning.
.THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft.
.FRI AND FRI NIGHT...W winds 15 to 20 kt, diminishing to 10 to
15 kt. Gusts up to 25 kt. Seas 2 to 4 ft.
.SAT AND SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ234-170900-
Buzzards Bay-
405 PM EDT Mon Jun 16 2025

.TONIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
1 foot at 2 seconds and S 1 foot at 7 seconds. Patchy fog. A
slight chance of showers after midnight. Vsby 1 to 3 NM.
.TUE...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
1 foot at 2 seconds and S 1 foot at 7 seconds. Patchy fog in the
morning with vsby 1 to 3 NM.
.TUE NIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 6 seconds.
.WED...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: SE
2 ft at 7 seconds and SW 1 foot at 3 seconds. Patchy fog in the
morning with vsby 1 to 3 NM.
.WED NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 7 seconds and SW 1 foot at 3 seconds. A chance of
showers.
.THU AND THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot
at 7 seconds.
.FRI AND FRI NIGHT...W winds 15 to 20 kt, diminishing to 10 to
15 kt. Gusts up to 25 kt. Seas 2 to 4 ft.
.SAT AND SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 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.

$$

ANZ235-170900-
Rhode Island Sound-
405 PM EDT Mon Jun 16 2025

.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 7 seconds and S 1 foot at 7 seconds. Patchy fog. A slight
chance of showers after midnight. Vsby 1 NM or less.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 7 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
2 to 3 ft. Wave Detail: S 3 ft at 7 seconds.
.WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds.
Patchy fog in the morning with vsby 1 to 3 NM.
.WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
3 ft at 6 seconds. A chance of showers and tstms.
.THU AND THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at
7 seconds.
.FRI THROUGH SAT NIGHT...SW winds 15 to 20 kt with gusts up to
25 kt. Seas 2 to 4 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.

$$

ANZ237-170900-
Block Island Sound-
405 PM EDT Mon Jun 16 2025

.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds. Patchy fog. A slight chance of showers after
midnight. Vsby 1 NM or less.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 7 seconds. Patchy fog in the morning with vsby 1 NM or less.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds.
.WED...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds. Patchy fog in the morning. A chance of showers in
the morning with vsby 1 to 3 NM.
.WED NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
S 3 ft at 6 seconds. A chance of showers and tstms.
.THU AND THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: SE 4 ft at 7 seconds and W 2 ft at
4 seconds.
.FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 4 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.

$$

ANZ230-170900-
Boston Harbor-
405 PM EDT Mon Jun 16 2025

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

$$

ANZ236-170900-
Narragansett Bay-
405 PM EDT Mon Jun 16 2025

.TONIGHT...E winds 5 to 10 kt. Waves around 2 ft. Patchy fog
after midnight. A chance of showers after midnight with vsby 1 to
3 NM.
.TUE...E winds 5 to 10 kt. Waves around 2 ft. Patchy fog in the
morning. A chance of showers in the morning with vsby 1 to 3 NM.
.TUE NIGHT...S winds around 5 kt. Waves around 2 ft.
.WED...SW winds 5 to 10 kt. Waves around 2 ft. Patchy fog in the
morning. A chance of showers in the morning with vsby 1 to 3 NM.
.WED NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.
.THU AND THU NIGHT...W winds 10 to 15 kt with gusts up to 25 kt.
Waves 2 to 3 ft.
.FRI THROUGH SAT NIGHT...SW 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