081
FZUS51 KBOX 032003
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
403 PM EDT Fri Oct 3 2025

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

ANZ200-040900-
403 PM EDT Fri Oct 3 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres remains anchored over the waters south of Southern New
England through early next week. SW winds trend lighter tonight and
more westerly for the weekend into early next week.

$$

ANZ250-040900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
403 PM EDT Fri Oct 3 2025

.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and E 3 ft at 10 seconds.
.SAT...W winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at
10 seconds and W 2 ft at 4 seconds.
.SAT NIGHT...S winds around 5 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 11 seconds and W 1 foot at 3 seconds. Patchy dense fog
after midnight with vsby 1 NM or less.
.SUN...SE winds around 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 14 seconds.
.SUN NIGHT THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up
to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E
3 ft at 13 seconds.
.TUE...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at
10 seconds.
.TUE NIGHT AND WED...SW winds 15 to 20 kt, becoming W 10 to
15 kt. Gusts up to 30 kt. Seas 2 to 4 ft. Showers likely. Vsby
1 to 3 NM.
.WED NIGHT...N winds 15 to 20 kt with gusts up to 30 kt. Seas
3 to 5 ft. A chance of showers. Vsby 1 to 3 NM.

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.

$$

ANZ251-040900-
Massachusetts Bay and Ipswich Bay-
403 PM EDT Fri Oct 3 2025

.TONIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 3 seconds and E 2 ft at 10 seconds.
.SAT...W winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to
3 ft. Wave Detail: W 2 ft at 3 seconds and E 2 ft at 10 seconds.
.SAT NIGHT...S winds around 5 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: E 2 ft at 11 seconds and W 1 foot
at 3 seconds.
.SUN...N winds around 5 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 13 seconds.
.SUN NIGHT THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and E
2 ft at 13 seconds.
.TUE...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 3 seconds and E 1 foot at
10 seconds.
.TUE NIGHT AND WED...SW winds 15 to 20 kt, becoming NW 10 to
15 kt. Gusts up to 25 kt. Seas 2 to 3 ft. Showers likely. Vsby
1 to 3 NM.
.WED NIGHT...N winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 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.

$$

ANZ231-040900-
Cape Cod Bay-
403 PM EDT Fri Oct 3 2025

.TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at
3 seconds.
.SAT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 10 seconds and W 1 foot at 3 seconds.
.SAT NIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 11 seconds and NW 1 foot at 3 seconds.
.SUN...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 9 seconds and SW 1 foot at 3 seconds.
.SUN NIGHT THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 13 seconds and S
1 foot at 2 seconds.
.TUE...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at
10 seconds.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas
3 to 4 ft. A chance of showers. Vsby 1 to 3 NM.
.WED AND WED NIGHT...W winds around 15 kt, becoming N. Gusts up
to 30 kt. Seas 3 to 4 ft. Showers. Vsby 1 to 3 NM.

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.

$$

ANZ254-040900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
403 PM EDT Fri Oct 3 2025

.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: E 4 ft at 10 seconds and SW 3 ft at 4 seconds.
.SAT...W winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at
10 seconds and W 3 ft at 4 seconds.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 13 seconds and W 1 foot at 3 seconds.
.SUN...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
14 seconds and SW 1 foot at 4 seconds.
.SUN NIGHT THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 13 seconds and
SW 2 ft at 3 seconds.
.TUE...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 10 seconds.
.TUE NIGHT...SW winds around 15 kt with gusts up to 25 kt. Seas
around 3 ft. A chance of showers. Vsby 1 to 3 NM.
.WED...W winds around 15 kt with gusts up to 25 kt. Seas 3 to
4 ft. Showers. Vsby 1 to 3 NM.
.WED NIGHT...N winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 6 ft. Showers likely. Vsby 1 to 3 NM.

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.

$$

ANZ255-040900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
403 PM EDT Fri Oct 3 2025

.TONIGHT...W winds around 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: W 4 ft at 5 seconds and E 4 ft at 10 seconds.
.SAT...W winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: W 3 ft
at 5 seconds and E 3 ft at 10 seconds.
.SAT NIGHT...W winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E
3 ft at 12 seconds and SW 2 ft at 5 seconds.
.SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and E 2 ft at 13 seconds. Patchy fog in the morning
with vsby 1 to 3 NM.
.SUN NIGHT THROUGH MON 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 E
2 ft at 14 seconds.
.TUE...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 10 seconds.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft. A chance of showers.
.WED AND WED NIGHT...W winds 15 to 20 kt, becoming N 20 to 25 kt.
Gusts up to 30 kt. Seas 3 to 5 ft. Showers. Vsby 1 to 3 NM.

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.

$$

ANZ256-040900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
403 PM EDT Fri Oct 3 2025

.TONIGHT...W winds around 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: SW 4 ft at 4 seconds and E 3 ft at 10 seconds.
.SAT...W winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: W 3 ft
at 5 seconds and SE 3 ft at 11 seconds.
.SAT NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE
3 ft at 12 seconds and SW 2 ft at 5 seconds.
.SUN...SW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 13 seconds and SW 1 foot at 4 seconds.
.SUN NIGHT THROUGH MON NIGHT...SW 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 3 ft at 14 seconds.
.TUE...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 SE 2 ft at
10 seconds.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft. A chance of showers.
.WED AND WED NIGHT...W winds 15 to 20 kt, becoming N 20 to 25 kt.
Gusts up to 30 kt. Seas 3 to 5 ft. Showers. Vsby 1 to 3 NM.

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.

$$

ANZ232-040900-
Nantucket Sound-
403 PM EDT Fri Oct 3 2025

.TONIGHT...W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: SW
3 ft at 4 seconds and E 2 ft at 10 seconds.
.SAT...W winds 10 to 15 kt, becoming SW 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and E
2 ft at 10 seconds.
.SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
W 1 foot at 4 seconds and E 1 foot at 11 seconds.
.SUN...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 4 seconds and E 1 foot at 13 seconds.
.SUN NIGHT THROUGH MON NIGHT...SW 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 14 seconds.
.TUE...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
10 seconds.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
around 3 ft. A chance of showers.
.WED AND WED NIGHT...W winds 15 to 20 kt, becoming N 20 to 25 kt.
Gusts up to 30 kt. Seas 3 to 4 ft. Showers. Vsby 1 to 3 NM.

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.

$$

ANZ233-040900-
Vineyard Sound-
403 PM EDT Fri Oct 3 2025

.TONIGHT...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 SE 1 foot at
10 seconds.
.SAT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 5 seconds and SE 1 foot at 10 seconds.
.SAT NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 5 seconds and SE 1 foot at 10 seconds.
.SUN...W winds around 5 kt, becoming S in the afternoon. Seas
around 2 ft. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at
12 seconds.
.SUN NIGHT THROUGH MON NIGHT...SW 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
SE 1 foot at 13 seconds.
.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at
10 seconds.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft. A chance of showers.
.WED AND WED NIGHT...W winds 15 to 20 kt, becoming N. Gusts up to
25 kt. Seas 2 to 4 ft. Showers. Vsby 1 to 3 NM.

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.

$$

ANZ234-040900-
Buzzards Bay-
403 PM EDT Fri Oct 3 2025

.TONIGHT...W winds 10 to 15 kt. Gusts up to 20 kt this evening.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot
at 9 seconds.
.SAT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft
at 5 seconds and SE 1 foot at 10 seconds.
.SAT NIGHT...W winds 5 to 10 kt. Seas around 2 ft in the evening,
then 1 foot or less. Wave Detail: SW 1 foot at 5 seconds and SE
1 foot at 10 seconds, becoming SW 1 foot at 5 seconds and SE
1 foot at 11 seconds.
.SUN...N winds around 5 kt, becoming S in the afternoon. Seas
1 foot or less. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot
at 12 seconds.
.SUN NIGHT THROUGH MON NIGHT...SW 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
SE 1 foot at 13 seconds.
.TUE...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at
10 seconds.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas
3 to 4 ft. A chance of showers.
.WED AND WED NIGHT...W winds around 15 kt, becoming N. Gusts up
to 25 kt. Seas 2 to 4 ft. Showers. Vsby 1 to 3 NM.

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.

$$

ANZ235-040900-
Rhode Island Sound-
403 PM EDT Fri Oct 3 2025

.TONIGHT...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 2 ft at
10 seconds.
.SAT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft
at 5 seconds and SE 2 ft at 10 seconds.
.SAT NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 5 seconds and SE 2 ft at 12 seconds.
.SUN...NW winds around 5 kt, becoming S in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 13 seconds and SW 1 foot at
4 seconds.
.SUN NIGHT THROUGH MON 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 14 seconds.
.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at
10 seconds.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft. A chance of showers.
.WED AND WED NIGHT...W winds 15 to 20 kt, becoming N. Gusts up to
25 kt. Seas 2 to 4 ft. Showers. Vsby 1 to 3 NM.

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.

$$

ANZ237-040900-
Block Island Sound-
403 PM EDT Fri Oct 3 2025

.TONIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 4 seconds and SE 2 ft at 10 seconds.
.SAT...W winds around 10 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft
at 4 seconds and SE 2 ft at 11 seconds.
.SAT NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: W
2 ft at 4 seconds and SE 2 ft at 12 seconds.
.SUN...N winds around 5 kt, becoming S in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 13 seconds and SW 1 foot at
4 seconds.
.SUN NIGHT THROUGH MON 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
SE 2 ft at 14 seconds.
.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at
10 seconds.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft. A chance of showers.
.WED AND WED NIGHT...W winds around 15 kt, becoming N. Gusts up
to 25 kt. Seas 3 to 4 ft. Showers likely. Vsby 1 to 3 NM.

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.

$$

ANZ230-040900-
Boston Harbor-
403 PM EDT Fri Oct 3 2025

.TONIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.SAT...W winds 5 to 10 kt, becoming S in the afternoon. Waves
1 foot or less.
.SAT NIGHT...S winds around 5 kt, becoming NW around 5 kt after
midnight. Waves 1 foot or less.
.SUN...N winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less.
.SUN NIGHT THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Waves around 2 ft.
.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Waves around
2 ft.
.TUE NIGHT AND WED...SW winds 15 to 20 kt, becoming NW 10 to
15 kt. Gusts up to 25 kt. Waves around 2 ft. Showers likely. Vsby
1 to 3 NM.
.WED NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Waves
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.

$$

ANZ236-040900-
Narragansett Bay-
403 PM EDT Fri Oct 3 2025

.TONIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after
midnight. Waves around 2 ft.
.SAT...W winds 5 to 10 kt, becoming SW in the afternoon. Waves
around 2 ft.
.SAT NIGHT...W winds around 5 kt. Waves around 2 ft.
.SUN...NE winds around 5 kt, becoming S in the afternoon. Waves
around 2 ft.
.SUN NIGHT THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Waves 2 to 3 ft.
.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to
3 ft.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
2 to 3 ft. A chance of showers. Vsby 1 to 3 NM.
.WED...W winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft. Showers likely. Vsby 1 to 3 NM.
.WED NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Waves
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.

$$

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