777
FZUS51 KBOX 100205
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EDT Sat Aug 9 2025

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

ANZ200-101500-
1004 PM EDT Sat Aug 9 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High Pressure is continuing to bring pleasant boating conditions
through midweek. Winds gradually increase form the SW Tue and Wed but
remain below small craft criteria.

$$

ANZ250-101500-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1004 PM EDT Sat Aug 9 2025

.OVERNIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds and S 1 foot at 3 seconds.
.SUN...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and SW 1 foot at 3 seconds. Patchy fog in the
morning.
.SUN NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and S
2 ft at 3 seconds.
.MON...S winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft
at 9 seconds and SW 1 foot at 3 seconds.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at
4 seconds.
.TUE AND TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 4 ft. Wave Detail: S 3 ft at 5 seconds and E 3 ft at
8 seconds.
.WED THROUGH THU NIGHT...NW winds 10 to 15 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.

$$

ANZ251-101500-
Massachusetts Bay and Ipswich Bay-
1004 PM EDT Sat Aug 9 2025

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

$$

ANZ231-101500-
Cape Cod Bay-
1004 PM EDT Sat Aug 9 2025

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

$$

ANZ254-101500-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1004 PM EDT Sat Aug 9 2025

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

$$

ANZ255-101500-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1004 PM EDT Sat Aug 9 2025

.OVERNIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds and SE 2 ft at 6 seconds. Patchy fog.
.SUN...E winds around 5 kt, becoming S around 5 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and
SE 2 ft at 7 seconds. Patchy fog in the morning with vsby 1 NM or
less.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds and SW 1 foot at 4 seconds. Patchy fog. Vsby
1 to 3 NM.
.MON...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft
at 8 seconds and W 2 ft at 3 seconds. Patchy fog in the morning
with vsby 1 to 3 NM.
.MON NIGHT THROUGH TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to
4 ft. Wave Detail: E 3 ft at 9 seconds and W 2 ft at 4 seconds.
.WED THROUGH THU NIGHT...W 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
2 ft at 8 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.

$$

ANZ256-101500-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1004 PM EDT Sat Aug 9 2025

.OVERNIGHT...SE winds around 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds and SE 2 ft at 8 seconds. Patchy fog.
.SUN...S 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 and
SE 2 ft at 7 seconds. Patchy fog in the morning.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds and SW 1 foot at 3 seconds. Patchy fog. Vsby
1 to 3 NM.
.MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 9 seconds and SW 2 ft at 3 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.MON NIGHT THROUGH TUE NIGHT...SW winds 10 to 15 kt. Seas 3 to
4 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 3 seconds.
.WED THROUGH THU NIGHT...W 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
2 ft at 8 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.

$$

ANZ232-101500-
Nantucket Sound-
1004 PM EDT Sat Aug 9 2025

.OVERNIGHT...SE winds around 5 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 7 seconds.
.SUN...SW winds around 5 kt, becoming S in the afternoon. Seas
around 2 ft. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at
7 seconds. Patchy fog in the morning.
.SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 3 seconds and SE 1 foot at 7 seconds. Patchy fog
after midnight with vsby 1 NM or less.
.MON...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and E 2 ft at 9 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.MON NIGHT THROUGH 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.
.WED THROUGH THU NIGHT...W winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E
1 foot at 8 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.

$$

ANZ233-101500-
Vineyard Sound-
1004 PM EDT Sat Aug 9 2025

.OVERNIGHT...S winds around 5 kt, becoming SW around 5 kt. Seas
around 2 ft. Wave Detail: SE 1 foot at 7 seconds.
.SUN...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
1 foot at 7 seconds and E 1 foot at 9 seconds. Patchy fog in the
morning.
.SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 3 seconds and SE 1 foot at 7 seconds. Patchy fog.
Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight.
.MON...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and
SW 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 to
3 NM.
.MON NIGHT THROUGH 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
E 2 ft at 9 seconds.
.WED THROUGH THU NIGHT...W 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
1 foot at 8 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.

$$

ANZ234-101500-
Buzzards Bay-
1004 PM EDT Sat Aug 9 2025

.OVERNIGHT...S winds around 5 kt. Seas 1 foot or less. Wave
Detail: SE 1 foot at 6 seconds. Patchy fog with vsby 1 to 3 NM.
.SUN...SW winds around 5 kt, increasing to around 10 kt in the
afternoon. Seas 1 foot or less, then around 2 ft in the
afternoon. Wave Detail: S 1 foot at 2 seconds and SE 1 foot at
7 seconds, becoming SW 1 foot at 2 seconds and SE 1 foot at
7 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 3 seconds and SE 1 foot at 7 seconds. Patchy
fog. Vsby 1 to 3 NM.
.MON...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and E
1 foot at 8 seconds, becoming SW 2 ft at 3 seconds and E 2 ft at
9 seconds. Patchy fog in the morning with vsby 1 NM or less.
.MON NIGHT THROUGH 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
E 2 ft at 9 seconds.
.WED THROUGH THU NIGHT...W winds 10 to 15 kt with gusts up to
25 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E
1 foot at 8 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.

$$

ANZ235-101500-
Rhode Island Sound-
1004 PM EDT Sat Aug 9 2025

.OVERNIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 7 seconds and E 1 foot at 9 seconds.
.SUN...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and SW 1 foot at 2 seconds. Patchy fog in the
morning.
.SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 8 seconds and SW 1 foot at 3 seconds. Patchy fog. Vsby
1 to 3 NM, decreasing to 1 NM or less after midnight.
.MON...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 to 3 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.
.MON NIGHT THROUGH TUE NIGHT...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
SE 2 ft at 9 seconds.
.WED THROUGH THU NIGHT...W 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
1 foot 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.

$$

ANZ237-101500-
Block Island Sound-
1004 PM EDT Sat Aug 9 2025

.OVERNIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 8 seconds and E 2 ft at 9 seconds.
.SUN...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and SW 1 foot at 2 seconds.
.SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 7 seconds and E 2 ft at 8 seconds. Patchy fog after
midnight with vsby 1 to 3 NM.
.MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 3 seconds and E 2 ft at 7 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.MON NIGHT THROUGH TUE 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.
.WED THROUGH THU NIGHT...W 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
1 foot at 8 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.

$$

ANZ230-101500-
Boston Harbor-
1004 PM EDT Sat Aug 9 2025

.OVERNIGHT...S winds 5 to 10 kt. Waves 1 foot or less.
.SUN...S winds 5 to 10 kt, becoming SE in the afternoon. Waves
1 foot or less, then around 2 ft in the afternoon.
.SUN NIGHT...S winds around 10 kt, becoming SW after midnight.
Waves around 2 ft in the evening, then 1 foot or less.
.MON...SW winds 5 to 10 kt, becoming S in the afternoon. Waves
1 foot or less, then around 2 ft in the afternoon.
.MON NIGHT...SW winds 5 to 10 kt. Waves around 2 ft in the
evening, then 1 foot or less.
.TUE AND TUE NIGHT...SW winds 10 to 15 kt. Waves around 2 ft.
.WED THROUGH THU NIGHT...N winds 10 to 15 kt with gusts up to
20 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.

$$

ANZ236-101500-
Narragansett Bay-
1004 PM EDT Sat Aug 9 2025

.OVERNIGHT...SW winds around 5 kt. Waves around 2 ft.
.SUN...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon. Patchy fog in the morning.
.SUN NIGHT...SW winds 5 to 10 kt. Waves around 2 ft in the
evening, then 1 foot or less. Patchy fog after midnight with vsby
1 NM or less.
.MON...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Waves around 2 ft. Patchy fog in the morning with vsby 1 NM or
less.
.MON NIGHT THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Waves around 2 ft.
.WED THROUGH THU NIGHT...W 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.

$$

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