Coastal Waters Forecast
Issued by NWS Boston, MA

Home |  Current Version |  Previous Version |  Text Only |  Print | Product List |  Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
914
FZUS51 KBOX 160206
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1006 PM EDT Sun Jun 15 2025

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

ANZ200-161500-
1006 PM EDT Sun Jun 15 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.

$$

ANZ250-161500-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds and S 1 foot at 7 seconds. Patchy fog. Vsby
1 to 3 NM.
.MON...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds and S 1 foot at 8 seconds. Patchy fog. Vsby 1 to
3 NM in the morning.
.MON NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds.
.TUE...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds and S 1 foot at 3 seconds.
.TUE NIGHT AND WED...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and S 2 ft at
4 seconds. A chance of showers.
.WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and SW 2 ft at
4 seconds.
.THU THROUGH FRI NIGHT...W 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.

$$

ANZ251-161500-
Massachusetts Bay and Ipswich Bay-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 7 seconds. Patchy fog with vsby 1 to 3 NM.
.MON...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds and S 1 foot at 7 seconds. Patchy fog in the morning
with vsby 1 to 3 NM.
.MON NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds.
.TUE...SE winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds.
.TUE NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt,
becoming S 5 to 10 kt after midnight. Seas around 2 ft. Wave
Detail: SE 2 ft at 6 seconds. A chance of showers.
.WED...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds and S 1 foot at 3 seconds. A chance of showers.
.WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.THU THROUGH FRI NIGHT...W 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.

$$

ANZ231-161500-
Cape Cod Bay-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...SE winds around 5 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 2 seconds and S 1 foot at 7 seconds.
.MON...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 2 seconds and S 1 foot at 7 seconds.
.MON NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 2 seconds and S 1 foot at 6 seconds.
.TUE...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 2 seconds and S 1 foot at 7 seconds.
.TUE NIGHT AND WED...S winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 5 seconds. A chance of showers.
.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.
.THU THROUGH FRI NIGHT...W 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.

$$

ANZ254-161500-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...E winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE
3 ft at 7 seconds.
.MON...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft
at 8 seconds and S 2 ft at 7 seconds. Patchy fog in the morning
with vsby 1 to 3 NM.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds.
.TUE...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.TUE NIGHT...SE winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
SE 3 ft at 7 seconds.
.WED...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft
at 7 seconds and SW 1 foot at 3 seconds. A chance of showers in
the morning.
.WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.THU THROUGH FRI NIGHT...W 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.

$$

ANZ255-161500-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 8 seconds and S 2 ft at 7 seconds. Patchy fog.
.MON...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft
at 8 seconds and S 2 ft at 7 seconds.
.MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE
3 ft at 7 seconds.
.TUE...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.TUE NIGHT...SE winds around 10 kt, becoming S after midnight.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds.
.WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 7 seconds. A chance of showers in the morning.
.WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.THU THROUGH FRI NIGHT...W 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.

$$

ANZ256-161500-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail:
SE 3 ft at 7 seconds. Patchy fog. Vsby 1 to 3 NM.
.MON...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: E 3 ft at 8 seconds and S 2 ft at 7 seconds.
.MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE
3 ft at 7 seconds.
.TUE...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft
at 7 seconds.
.TUE NIGHT AND WED...SW winds 10 to 15 kt. Seas around 3 ft. Wave
Detail: SE 3 ft at 7 seconds. A chance of showers through the
day.
.WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S
3 ft at 7 seconds.
.THU THROUGH FRI NIGHT...W 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.

$$

ANZ232-161500-
Nantucket Sound-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 6 seconds.
.MON...E winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds.
.MON NIGHT...E winds around 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 7 seconds.
.TUE...E winds around 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds.
.TUE NIGHT...SE winds around 10 kt, becoming S after midnight.
Seas around 2 ft. Wave Detail: SE 2 ft at 6 seconds.
.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 3 seconds and E 2 ft at
7 seconds. A chance of showers in the morning.
.WED NIGHT...SW winds 10 to 15 kt. Seas around 2 ft.
.THU THROUGH FRI NIGHT...W 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.

$$

ANZ233-161500-
Vineyard Sound-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...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.
.MON...E winds around 10 kt. Seas around 2 ft. Wave Detail: E
1 foot at 3 seconds and S 1 foot at 7 seconds.
.MON NIGHT...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.
.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.
.TUE NIGHT AND WED...SW winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 5 seconds and SW 1 foot at 2 seconds. A chance
of showers through the day.
.WED NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 4 seconds and SE 1 foot at 7 seconds.
.THU THROUGH FRI NIGHT...W 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.

$$

ANZ234-161500-
Buzzards Bay-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...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.
.MON...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.
.MON NIGHT...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.
.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.
.TUE NIGHT AND WED...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds. A chance of
showers through the day.
.WED NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 6 seconds and SW 1 foot at 3 seconds.
.THU THROUGH FRI NIGHT...W 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.

$$

ANZ235-161500-
Rhode Island Sound-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds.
.MON...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.MON NIGHT...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
SE 3 ft at 7 seconds.
.TUE...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.TUE NIGHT AND WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 7 seconds. A chance of showers through the
day.
.WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
3 ft at 6 seconds and SW 1 foot at 3 seconds.
.THU THROUGH FRI NIGHT...W 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.

$$

ANZ237-161500-
Block Island Sound-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds.
.MON...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.MON NIGHT...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
SE 3 ft at 7 seconds.
.TUE...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.TUE NIGHT AND WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 7 seconds. A chance of showers through the
day.
.WED NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
SE 3 ft at 6 seconds and SW 1 foot at 3 seconds.
.THU THROUGH FRI NIGHT...W 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.

$$

ANZ230-161500-
Boston Harbor-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...SE winds 5 to 10 kt. Waves 1 foot or less. Patchy
fog with vsby 1 to 3 NM.
.MON...E winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon. Patchy fog in the morning.
.MON NIGHT...SE winds 5 to 10 kt. Waves around 2 ft in the
evening, then 1 foot or less.
.TUE...E winds 5 to 10 kt, becoming SE 10 to 15 kt in the
afternoon. Waves 1 foot or less, then around 2 ft in the
afternoon.
.TUE NIGHT...S winds 5 to 10 kt. Waves around 2 ft in the
evening, then 1 foot or less. A chance of showers.
.WED...SW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon. A chance of showers.
.WED NIGHT...SW winds around 10 kt. Waves around 2 ft in the
evening, then 1 foot or less.
.THU...SW winds 15 to 20 kt with gusts up to 25 kt. Waves around
2 ft. A chance of showers.
.THU NIGHT THROUGH FRI NIGHT...W 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.

$$

ANZ236-161500-
Narragansett Bay-
1006 PM EDT Sun Jun 15 2025

.OVERNIGHT...E winds 5 to 10 kt. Waves around 2 ft.
.MON...E winds 5 to 10 kt. Waves around 2 ft.
.MON NIGHT...E winds 5 to 10 kt. Waves around 2 ft.
.TUE...E winds 5 to 10 kt. Waves around 2 ft.
.TUE NIGHT...SE winds 5 to 10 kt, becoming S after midnight.
Waves around 2 ft. A chance of showers after midnight.
.WED...S winds 5 to 10 kt. Waves around 2 ft. A chance of showers
in the morning.
.WED NIGHT...SW winds around 10 kt. Waves around 2 ft.
.THU THROUGH FRI NIGHT...W 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