131
FZUS51 KBOX 060205
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1005 PM EDT Tue Aug 5 2025

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

ANZ200-061500-
1005 PM EDT Tue Aug 5 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
A prolonged period of tranquil marine conditions is expected due to
a vast high pres most of this week, but will need to monitor a low
pres off the Carolina coast later in the weekend. Some increased
swell may be possible Thu into Sat.

$$

ANZ250-061500-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds and SE 2 ft at 9 seconds.
.WED...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 9 seconds.
.WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds.
.THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas
2 to 3 ft. Wave Detail: E 3 ft at 8 seconds.
.THU NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
around 3 ft. Wave Detail: E 3 ft at 8 seconds and S 1 foot at
8 seconds.
.FRI AND FRI NIGHT...SW 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
3 seconds.
.SAT THROUGH SUN 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.

$$

ANZ251-061500-
Massachusetts Bay and Ipswich Bay-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds around 5 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 7 seconds and NE 1 foot at 4 seconds.
.WED...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 9 seconds and NE 1 foot at 4 seconds.
.WED NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds.
.THU...NE winds around 5 kt, becoming SE in the afternoon. Seas
2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and NE 1 foot at
3 seconds.
.THU NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and SE 1 foot at
2 seconds.
.FRI AND FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and SE 2 ft at
3 seconds.
.SAT THROUGH SUN NIGHT...SW winds 10 to 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.

$$

ANZ231-061500-
Cape Cod Bay-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds around 5 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 7 seconds and N 1 foot at 3 seconds. Patchy fog with
vsby 1 NM or less.
.WED...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds and N 1 foot at 4 seconds.
.WED NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and E 1 foot at 2 seconds.
.THU...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds and NE 1 foot at 2 seconds.
.THU NIGHT...SE winds 5 to 10 kt, becoming SW after midnight.
Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and SE 1 foot
at 2 seconds.
.FRI AND FRI 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.
.SAT THROUGH SUN 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.

$$

ANZ254-061500-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 7 seconds and SE 2 ft at 8 seconds. Patchy fog with vsby
1 NM or less.
.WED...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 8 seconds and NE 1 foot at 4 seconds. Patchy fog. Vsby 1 NM or
less, increasing to 1 to 3 NM in the afternoon.
.WED NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 8 seconds and NE 1 foot at 3 seconds.
.THU...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 8 seconds and S 1 foot at 7 seconds.
.THU NIGHT THROUGH FRI NIGHT...S winds 5 to 10 kt. Seas 3 to
4 ft. Wave Detail: E 3 ft at 9 seconds and SE 1 foot at
2 seconds.
.SAT THROUGH SUN NIGHT...S winds 5 to 10 kt with gusts up to
20 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SW
2 ft at 3 seconds.

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.

$$

ANZ255-061500-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds around 10 kt. Seas 2 to 4 ft. Wave Detail:
E 3 ft at 7 seconds and SE 2 ft at 8 seconds. Hazy. Patchy fog
with vsby 1 NM or less.
.WED...NE winds around 10 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: E 3 ft at 9 seconds and NE 1 foot at
3 seconds. Patchy fog in the morning with vsby 1 NM or less.
.WED NIGHT...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E
3 ft at 8 seconds and NE 1 foot at 3 seconds.
.THU...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft
at 8 seconds and E 1 foot at 3 seconds.
.THU NIGHT THROUGH FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to
4 ft. Wave Detail: E 4 ft at 9 seconds and SE 1 foot at
3 seconds.
.SAT THROUGH SUN NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave
Detail: E 3 ft at 9 seconds and S 2 ft at 4 seconds.

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.

$$

ANZ256-061500-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds around 10 kt. Seas 3 to 4 ft. Wave Detail:
E 4 ft at 9 seconds and SE 2 ft at 8 seconds. Hazy. Patchy fog
with vsby 1 NM or less.
.WED...NE winds around 10 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: E 4 ft at 9 seconds and SE 1 foot at
8 seconds.
.WED NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds and S
1 foot at 8 seconds.
.THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: E 4 ft at 8 seconds and E 2 ft at 4 seconds.
.THU NIGHT THROUGH FRI NIGHT...SE winds around 10 kt. Seas 3 to
4 ft. Wave Detail: E 4 ft at 8 seconds and S 1 foot at 7 seconds.
.SAT THROUGH SUN NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft.
Wave Detail: E 3 ft at 9 seconds and S 2 ft at 4 seconds.

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.

$$

ANZ232-061500-
Nantucket Sound-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 7 seconds and NE 1 foot at 3 seconds. Hazy. Patchy fog
with vsby 1 NM or less.
.WED...NE winds around 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and NE 1 foot at 3 seconds.
.WED NIGHT...E winds around 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 8 seconds and E 1 foot at 3 seconds.
.THU...E winds around 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and E 1 foot at 3 seconds.
.THU NIGHT THROUGH FRI NIGHT...S winds 5 to 10 kt. Seas around
2 ft. Wave Detail: E 2 ft at 8 seconds and SE 1 foot at
3 seconds.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 9 seconds.

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.

$$

ANZ233-061500-
Vineyard Sound-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 8 seconds and NE 1 foot at 2 seconds. Hazy.
.WED...NE winds around 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and NE 1 foot at 2 seconds.
.WED NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and E 1 foot at 3 seconds.
.THU...E winds around 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and NE 1 foot at 3 seconds.
.THU NIGHT THROUGH FRI 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.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt. Seas around 2 ft.
Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 10 seconds.

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.

$$

ANZ234-061500-
Buzzards Bay-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds 5 to 10 kt. Seas 1 foot or less, then
around 2 ft. Wave Detail: NE 1 foot at 2 seconds and E 1 foot at
7 seconds, becoming E 2 ft at 8 seconds and NE 1 foot at
2 seconds.
.WED...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 8 seconds and NE 1 foot at 2 seconds.
.WED NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 8 seconds and E 1 foot at 2 seconds.
.THU...NE winds 5 to 10 kt, becoming E in the afternoon. Seas
1 foot or less, then around 2 ft in the afternoon. Wave Detail:
NE 1 foot at 2 seconds and S 1 foot at 7 seconds, becoming E 2 ft
at 8 seconds and E 1 foot at 2 seconds.
.THU NIGHT THROUGH FRI 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.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and S
1 foot at 2 seconds.

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.

$$

ANZ235-061500-
Rhode Island Sound-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 9 seconds and NE 1 foot at 3 seconds. Hazy.
.WED...NE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 9 seconds and NE 1 foot at 3 seconds.
.WED NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds and NE 1 foot at 3 seconds.
.THU...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and E 2 ft at 4 seconds.
.THU NIGHT THROUGH FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to
3 ft. Wave Detail: SE 3 ft at 8 seconds and E 2 ft at 3 seconds.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
Wave Detail: S 2 ft at 6 seconds and SE 2 ft at 9 seconds.

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.

$$

ANZ237-061500-
Block Island Sound-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 7 seconds and SE 2 ft at 8 seconds. Hazy.
.WED...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 9 seconds and SE 2 ft at 8 seconds.
.WED NIGHT...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds and NE 1 foot at 3 seconds.
.THU...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds and E 1 foot at 3 seconds.
.THU NIGHT THROUGH FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to
3 ft. Wave Detail: E 3 ft at 8 seconds and NE 1 foot at
3 seconds.
.SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 4 seconds.

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.

$$

ANZ230-061500-
Boston Harbor-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds around 5 kt. Waves 1 foot or less.
.WED...NE winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 foot or less.
.THU...E winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon.
.THU NIGHT...S winds 5 to 10 kt, becoming SW after midnight.
Waves 1 foot or less.
.FRI AND FRI NIGHT...SW winds 10 to 15 kt. Waves around 2 ft.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 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.

$$

ANZ236-061500-
Narragansett Bay-
1005 PM EDT Tue Aug 5 2025

.OVERNIGHT...NE winds around 5 kt. Waves around 2 ft. Hazy.
.WED...NE winds 5 to 10 kt. Waves around 2 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves around 2 ft.
.THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Waves
around 2 ft.
.THU NIGHT THROUGH FRI NIGHT...S winds 5 to 10 kt. Waves around
2 ft.
.SAT THROUGH SUN 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.

$$

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