103
FZUS51 KBOX 261705
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
105 PM EDT Thu Jun 26 2025

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

ANZ200-270600-
105 PM EDT Thu Jun 26 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Cold front remains south of the southern waters late this week and
will be a source for shower activity. An area of high pressure exits
eastern Canada late this week and brings gusty northeasterly flow
into early this weekend.

$$

ANZ250-270600-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...E winds 10 to 15 kt with gusts up to 20 kt.
Seas around 3 ft. Wave Detail: NE 3 ft at 5 seconds and SE 1 foot
at 10 seconds.
.TONIGHT...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: NE
3 ft at 5 seconds and SE 1 foot at 10 seconds.
.FRI...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: E 2 ft at 5 seconds and SE 2 ft at 10 seconds.
.FRI NIGHT...SE 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 2 ft at
5 seconds. A chance of showers in the evening, then showers
likely after midnight.
.SAT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
5 ft. Wave Detail: E 4 ft at 6 seconds and SE 2 ft at 9 seconds.
Showers likely.
.SAT NIGHT...NE winds around 10 kt. Seas 4 to 5 ft. Wave Detail:
E 5 ft at 7 seconds and SE 2 ft at 8 seconds. Showers likely.
.SUN...NE winds 5 to 10 kt. Seas 4 to 5 ft. A chance of showers.
.SUN NIGHT AND MON...E winds 5 to 10 kt. Seas 3 to 5 ft.
.MON NIGHT...S winds around 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.

$$

ANZ251-270600-
Massachusetts Bay and Ipswich Bay-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...E winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: NE 3 ft at 5 seconds and SE 1 foot
at 10 seconds. Isolated showers.
.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 5 seconds and SE 1 foot at 10 seconds.
.FRI...E winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: E 2 ft at 5 seconds and SE 1 foot at
10 seconds.
.FRI NIGHT...SE winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail:
SE 2 ft at 4 seconds and SE 1 foot at 10 seconds. A chance of
showers in the evening, then showers likely after midnight.
.SAT...E winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: E 3 ft
at 6 seconds and SE 2 ft at 9 seconds. Showers likely.
.SAT NIGHT...NE winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E
4 ft at 7 seconds and SE 1 foot at 3 seconds. Showers likely.
.SUN...NE winds 5 to 10 kt. Seas 4 to 5 ft. A chance of showers.
.SUN NIGHT...NE winds 5 to 10 kt. Seas 3 to 5 ft.
.MON AND MON NIGHT...E winds 5 to 10 kt, becoming S. 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.

$$

ANZ231-270600-
Cape Cod Bay-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and SE 1 foot
at 10 seconds.
.TONIGHT...E winds 10 to 15 kt. Seas around 2 ft. Wave Detail: NE
2 ft at 5 seconds and SE 1 foot at 10 seconds.
.FRI...E winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: E 2 ft at 3 seconds and SE 1 foot at
10 seconds.
.FRI NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 3 seconds and SE
2 ft at 9 seconds. A chance of showers in the evening, then
showers likely after midnight.
.SAT...SE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 8 seconds and SE 1 foot at 3 seconds. Showers likely.
.SAT NIGHT...NE winds 5 to 10 kt, becoming N after midnight. Seas
2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and E 1 foot at
3 seconds. A chance of showers in the evening. Showers likely
after midnight.
.SUN...NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.SUN NIGHT THROUGH MON NIGHT...S 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.

$$

ANZ254-270600-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas around 3 ft. Wave Detail: NE 3 ft at 5 seconds and SE 1 foot
at 10 seconds. Isolated showers.
.TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: NE 3 ft at 5 seconds and SE 1 foot at
10 seconds.
.FRI...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: E 3 ft at 5 seconds and SE 1 foot at
10 seconds.
.FRI NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: E 3 ft at 6 seconds and SE 3 ft at
9 seconds. A chance of showers in the evening, then showers
likely after midnight.
.SAT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: SE 4 ft at 8 seconds and E 2 ft at 5 seconds.
Showers likely in the morning. A chance of showers in the
afternoon.
.SAT NIGHT...S winds around 10 kt, becoming W after midnight.
Seas 4 to 5 ft. Wave Detail: SE 5 ft at 7 seconds. A chance of
showers in the evening. Showers likely after midnight.
.SUN...N winds 5 to 10 kt. Seas 4 to 5 ft. A chance of showers.
.SUN NIGHT THROUGH MON NIGHT...S winds 5 to 10 kt. Seas 3 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.

$$

ANZ255-270600-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt.
Seas around 3 ft. Wave Detail: NE 3 ft at 4 seconds and SE 1 foot
at 10 seconds. Isolated showers.
.TONIGHT...E winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 4 seconds and SE 1 foot at 10 seconds.
.FRI...E winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft. Wave Detail: E 4 ft at 5 seconds and SE 1 foot at
10 seconds.
.FRI NIGHT...E winds 15 to 20 kt, becoming SE 10 to 15 kt after
midnight. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 8 seconds. A
chance of showers in the evening, then showers likely after
midnight.
.SAT...S winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft
at 7 seconds and E 1 foot at 4 seconds. A chance of showers.
.SAT NIGHT...S winds around 10 kt, becoming SW after midnight.
Seas 3 to 4 ft. Wave Detail: E 3 ft at 7 seconds and SW 2 ft at
4 seconds. A chance of showers in the evening. Showers likely
after midnight.
.SUN...N winds around 10 kt. Seas 3 to 4 ft. A chance of showers.
.SUN NIGHT THROUGH MON NIGHT...SW winds 5 to 10 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.

$$

ANZ256-270600-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...NE winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 4 ft. Wave Detail: NE 4 ft at 5 seconds and SE 1 foot
at 10 seconds. Isolated showers.
.TONIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: E 4 ft at 5 seconds and SE 1 foot at
10 seconds.
.FRI...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
5 ft. Wave Detail: E 5 ft at 5 seconds and SE 1 foot at
10 seconds.
.FRI NIGHT...E winds 15 to 20 kt, becoming SE 10 to 15 kt after
midnight. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 8 seconds. A
chance of showers.
.SAT AND SAT NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: SE 4 ft at 7 seconds and S 2 ft at 4 seconds. A chance of
showers.
.SUN...NE winds around 10 kt. Seas 3 to 4 ft. Wave Detail: SW
2 ft at 5 seconds and E 2 ft at 7 seconds. A chance of showers.
.SUN NIGHT AND MON...E winds 5 to 10 kt, becoming SE. Seas 2 to
4 ft.
.MON NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. A chance of
showers.

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.

$$

ANZ232-270600-
Nantucket Sound-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and SE 1 foot
at 9 seconds. Isolated showers.
.TONIGHT...E winds around 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: E 2 ft at 4 seconds and SE 1 foot at
10 seconds.
.FRI...E winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 4 seconds and SE 1 foot at 10 seconds.
.FRI NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: E 3 ft at 5 seconds and SE
2 ft at 8 seconds. A chance of showers in the evening, then
showers likely after midnight.
.SAT...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 4 seconds and SE 2 ft at 8 seconds. A chance of showers.
.SAT NIGHT...S winds around 10 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds and S 1 foot at
3 seconds. A chance of showers in the evening. Showers likely
after midnight.
.SUN...NE winds around 10 kt. Seas around 2 ft. A chance of
showers.
.SUN NIGHT THROUGH MON NIGHT...SW 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.

$$

ANZ233-270600-
Vineyard Sound-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and SE 1 foot
at 10 seconds.
.TONIGHT...E winds around 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: NE 2 ft at 3 seconds and SE 1 foot at
10 seconds.
.FRI...E winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 3 seconds and SE 1 foot at 9 seconds.
.FRI NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE
2 ft at 8 seconds. A chance of showers in the evening, then
showers likely after midnight.
.SAT...S winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and SE 1 foot at 4 seconds. Showers likely in
the morning. A chance of showers in the afternoon.
.SAT NIGHT...SE winds around 10 kt, becoming NE after midnight.
Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SE 1 foot
at 4 seconds. A chance of showers in the evening. Showers likely
after midnight.
.SUN...NE winds 5 to 10 kt. Seas around 2 ft. A chance of
showers.
.SUN NIGHT THROUGH MON NIGHT...SW 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.

$$

ANZ234-270600-
Buzzards Bay-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and SE 1 foot
at 10 seconds.
.TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: NE 2 ft at 3 seconds and SE 1 foot at
10 seconds.
.FRI...E winds 15 to 20 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 3 seconds and SE 1 foot at 10 seconds.
.FRI NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. Wave Detail: E 2 ft at 3 seconds and
SE 2 ft at 8 seconds. A chance of showers in the evening, then
showers likely after midnight.
.SAT...SE winds around 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and SE 1 foot at 3 seconds. Showers likely in
the morning. A chance of showers in the afternoon.
.SAT NIGHT...E winds 5 to 10 kt, becoming NE after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SE 1 foot at
4 seconds. A chance of showers in the evening. Showers likely
after midnight.
.SUN...NE winds 5 to 10 kt. Seas around 2 ft. A chance of
showers.
.SUN NIGHT THROUGH MON NIGHT...SW 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.

$$

ANZ235-270600-
Rhode Island Sound-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: NE 3 ft at 4 seconds and SE 1 foot
at 10 seconds.
.TONIGHT...E winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 5 seconds and SE 1 foot at 10 seconds.
.FRI...E winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: E 4 ft at 5 seconds and SE 1 foot at
10 seconds.
.FRI NIGHT...E winds 15 to 20 kt, becoming SE 10 to 15 kt after
midnight. Seas 2 to 4 ft. Wave Detail: E 4 ft at 7 seconds. A
chance of showers in the evening, then showers likely after
midnight.
.SAT...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and SE 1 foot at 4 seconds. Showers likely in the
morning. A chance of showers in the afternoon.
.SAT NIGHT...SE winds around 10 kt, becoming NE after midnight.
Seas 2 to 3 ft. Wave Detail: SE 3 ft at 6 seconds. Showers
likely.
.SUN...NE winds around 10 kt. Seas 2 to 3 ft. A chance of
showers.
.SUN NIGHT THROUGH MON NIGHT...SW 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.

$$

ANZ237-270600-
Block Island Sound-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: E 3 ft at 5 seconds and SE 1 foot at
10 seconds.
.TONIGHT...E winds around 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: E 3 ft at 5 seconds and SE 1 foot at
10 seconds.
.FRI...E winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: E 4 ft at 5 seconds and SE 1 foot at
10 seconds.
.FRI NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 7 seconds. A
chance of showers.
.SAT...SE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds and E 1 foot at 5 seconds. A chance of showers.
.SAT NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and SE 2 ft at
5 seconds. A chance of showers.
.SUN...NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.SUN NIGHT AND MON...E winds 5 to 10 kt, becoming SE. Seas 2 to
3 ft.
.MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. A chance of
showers.

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.

$$

ANZ230-270600-
Boston Harbor-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...E winds around 10 kt. Waves around 2 ft.
Isolated showers.
.TONIGHT...E winds 5 to 10 kt. Waves 1 foot or less.
.FRI...E winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves around 2 ft.
.FRI NIGHT...SE winds 10 to 15 kt. Waves around 2 ft in the
evening, then 1 foot or less. A chance of showers in the evening,
then showers likely after midnight.
.SAT AND SAT NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft.
Showers likely. A chance of showers after midnight.
.SUN...NE winds 5 to 10 kt. Waves 1 foot or less, except 2 to
4 ft at the outer harbor entrance. A chance of showers.
.SUN NIGHT THROUGH MON NIGHT...S winds 5 to 10 kt. Waves 1 foot
or less, except 2 to 4 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.

$$

ANZ236-270600-
Narragansett Bay-
105 PM EDT Thu Jun 26 2025

.THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft.
.FRI...E winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft.
.FRI NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft. A
chance of showers in the evening, then showers likely after
midnight.
.SAT...SE winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers.
.SAT NIGHT...E winds 5 to 10 kt, becoming NE after midnight.
Waves 2 to 3 ft. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers.
.SUN NIGHT THROUGH MON NIGHT...SW 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