053
FZUS51 KBOX 061805
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 PM EST Sat Dec 6 2025

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

ANZ200-070700-
104 PM EST Sat Dec 6 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Weak low pres system passes well to our south today. Another strong
cold front will cross the waters late Sun into Sun night followed by
high pres building in from the west on Mon. Low pres will then
approach from the west on Tue.

$$

ANZ250-070700-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SE 1 foot at 3 seconds and W 1 foot at 3 seconds. A
slight chance of rain.
.TONIGHT...W winds 10 to 15 kt. Gusts up to 20 kt after midnight.
Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at
9 seconds.
.SUN...NW winds 10 to 15 kt with gusts up to 20 kt, becoming N
5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft
at 4 seconds and SE 3 ft at 9 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 20 to 25 kt after
midnight. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and
SE 3 ft at 9 seconds. A chance of rain and snow after midnight.
.MON AND MON NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Seas 4 to 6 ft. Wave Detail: N 6 ft at 6 seconds and SE 3 ft at
8 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 NE 3 ft at 6 seconds.
.TUE NIGHT THROUGH WED NIGHT...SW winds 20 to 25 kt with gusts up
to 30 kt. Seas 2 to 4 ft. A chance of rain.

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.

$$

ANZ251-070700-
Massachusetts Bay and Ipswich Bay-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: W 1 foot at 2 seconds and SE 1 foot at 3 seconds. A
slight chance of rain.
.TONIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W
2 ft at 3 seconds and SE 1 foot at 3 seconds.
.SUN...NW winds 10 to 15 kt, becoming N 5 to 10 kt in the
afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds
and SE 2 ft at 9 seconds.
.SUN NIGHT...SW winds 5 to 10 kt, becoming W 20 to 25 kt after
midnight. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E
3 ft at 9 seconds.
.MON AND MON NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Seas 2 to 4 ft. Wave Detail: N 4 ft at 5 seconds and E 2 ft at
8 seconds.
.TUE...SW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 3 seconds and NE 2 ft at 6 seconds.
.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 3 ft. A chance of rain.
.WED AND WED NIGHT...SW winds 10 to 15 kt, increasing to 15 to
20 kt. Seas 2 to 3 ft. A chance of rain.

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.

$$

ANZ231-070700-
Cape Cod Bay-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...S winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SE 1 foot at 3 seconds and NW 1 foot at 3 seconds. A
slight chance of rain.
.TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W
1 foot at 3 seconds and SE 1 foot at 5 seconds.
.SUN...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 2 ft
at 4 seconds and SE 2 ft at 9 seconds.
.SUN NIGHT...SW winds 5 to 10 kt, becoming W 15 to 20 kt with
gusts up to 25 kt after midnight. Seas 2 to 3 ft. Wave Detail: NW
2 ft at 4 seconds and SE 2 ft at 9 seconds.
.MON AND MON NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Seas 2 to 4 ft. Wave Detail: N 4 ft at 6 seconds and E 2 ft at
8 seconds.
.TUE...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: N 3 ft at 6 seconds and SW 2 ft at 3 seconds.
.TUE NIGHT THROUGH WED NIGHT...SW winds 15 to 20 kt with gusts up
to 25 kt. Seas 2 to 4 ft. A chance of rain.

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.

$$

ANZ254-070700-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...S winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 4 seconds and NW 1 foot at 6 seconds. A slight
chance of rain.
.TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Seas
2 to 4 ft. Wave Detail: NW 2 ft at 4 seconds and SE 2 ft at
5 seconds.
.SUN...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and
SE 3 ft at 9 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt with
gusts up to 25 kt after midnight. Seas 3 to 4 ft. Wave Detail: NW
3 ft at 4 seconds and SE 3 ft at 8 seconds.
.MON AND MON NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Seas 4 to 6 ft. Wave Detail: N 6 ft at 7 seconds and E 3 ft at
8 seconds.
.TUE AND TUE NIGHT...W winds 10 to 15 kt, becoming SW 20 to
25 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and N
4 ft at 7 seconds.
.WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft. A chance of rain.
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
5 to 7 ft. A chance of rain.

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.

$$

ANZ255-070700-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...S winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 9 seconds and SE 1 foot at 5 seconds.
.TONIGHT...NW winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: W
3 ft at 4 seconds and SE 3 ft at 9 seconds.
.SUN...NW winds 10 to 15 kt, becoming N 5 to 10 kt in the
afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft at 4 seconds and
SE 3 ft at 8 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 20 to 25 kt after
midnight. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 6 seconds and
SE 3 ft at 8 seconds.
.MON...NW winds 25 to 30 kt. Seas 5 to 7 ft. Wave Detail: W 6 ft
at 7 seconds and E 2 ft at 8 seconds.
.MON NIGHT...N winds 20 to 25 kt with gusts up to 30 kt,
diminishing to 15 to 20 kt after midnight. Seas 4 to 6 ft. Wave
Detail: N 5 ft at 5 seconds and SW 1 foot at 6 seconds.
.TUE...W winds 15 to 20 kt. Seas 2 to 4 ft.
.TUE NIGHT...SW winds 25 to 30 kt. Seas 5 to 7 ft.
.WED...SW winds 25 to 30 kt. Seas 5 to 7 ft. A chance of rain.
.WED NIGHT...SW winds 25 to 30 kt. Seas 7 to 10 ft. A chance of
rain.

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.

$$

ANZ256-070700-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 4 seconds and SE 2 ft at 10 seconds.
.TONIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and SE
3 ft at 9 seconds.
.SUN...N winds 10 to 15 kt, becoming SE 5 to 10 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and
NW 2 ft at 4 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming NW 20 to 25 kt after
midnight. Seas 3 to 5 ft. Wave Detail: W 4 ft at 4 seconds and SW
3 ft at 7 seconds.
.MON...NW winds 25 to 30 kt, becoming N 20 to 25 kt in the
afternoon. Seas 4 to 6 ft. Wave Detail: N 5 ft at 5 seconds and
SW 3 ft at 6 seconds.
.MON NIGHT...N winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. Seas 3 to 5 ft. Wave Detail: N 5 ft at 5 seconds
and E 2 ft at 8 seconds.
.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
3 ft.
.TUE NIGHT...SW winds 25 to 30 kt. Seas 5 to 7 ft.
.WED...SW winds 25 to 30 kt. Seas 6 to 9 ft. A chance of rain.
.WED NIGHT...W winds 25 to 30 kt. Seas 8 to 11 ft. A chance of
rain.

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.

$$

ANZ232-070700-
Nantucket Sound-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...S winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SE 1 foot at 3 seconds and NW 1 foot at 4 seconds. A
slight chance of rain.
.TONIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: NW
2 ft at 3 seconds and SE 1 foot at 5 seconds.
.SUN...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW
2 ft at 3 seconds and E 1 foot at 5 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt with
gusts up to 25 kt after midnight. Seas 2 to 3 ft. Wave Detail: W
3 ft at 4 seconds and N 1 foot at 4 seconds.
.MON...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
4 ft. Wave Detail: N 4 ft at 5 seconds and SW 1 foot at
6 seconds.
.MON NIGHT...N winds 20 to 25 kt, becoming NW 10 to 15 kt after
midnight. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and SW
1 foot at 6 seconds. A chance of light freezing spray in the
evening.
.TUE...W winds 15 to 20 kt. Seas 2 to 3 ft.
.TUE NIGHT...SW winds 20 to 25 kt. Seas 3 to 5 ft.
.WED...SW winds 20 to 25 kt. Seas 2 to 4 ft. A chance of rain.
.WED NIGHT...SW winds 20 to 25 kt. Seas 4 to 6 ft. A chance of
rain.

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.

$$

ANZ233-070700-
Vineyard Sound-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: S 1 foot at 3 seconds and SE 1 foot at 10 seconds. A
slight chance of rain.
.TONIGHT...NW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 8 seconds and SW 1 foot at 3 seconds.
.SUN...N winds 5 to 10 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 8 seconds and NW 1 foot at
3 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt with
gusts up to 25 kt after midnight. Seas 2 to 3 ft. Wave Detail: W
2 ft at 4 seconds and SW 2 ft at 7 seconds.
.MON AND MON NIGHT...N winds 20 to 25 kt. Seas 2 to 4 ft. Wave
Detail: N 3 ft at 5 seconds and SW 2 ft at 6 seconds.
.TUE...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SW 2 ft at 4 seconds and N 1 foot at
4 seconds.
.TUE NIGHT...SW winds 25 to 30 kt. Seas 3 to 5 ft.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. A chance of rain.
.WED NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas
5 to 7 ft. A chance of rain.

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.

$$

ANZ234-070700-
Buzzards Bay-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...SW winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 3 seconds and SE 1 foot at 10 seconds. A
slight chance of rain.
.TONIGHT...NW winds around 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 9 seconds and W 1 foot at 3 seconds.
.SUN...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: NW 1 foot at 3 seconds and E 1 foot at
4 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt after
midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and S
2 ft at 7 seconds.
.MON AND MON NIGHT...NW winds 20 to 25 kt. Seas 2 to 3 ft. Wave
Detail: N 2 ft at 4 seconds and SW 2 ft at 6 seconds. A chance of
light freezing spray through the night.
.TUE AND TUE NIGHT...W winds 15 to 20 kt, becoming SW 20 to 25 kt
with gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at
5 seconds and NE 1 foot at 4 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft. A chance of rain.
.WED NIGHT...SW winds 20 to 25 kt. Seas 4 to 6 ft. A chance of
rain.

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.

$$

ANZ235-070700-
Rhode Island Sound-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 4 seconds and W 1 foot at 3 seconds.
.TONIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W
2 ft at 3 seconds and S 2 ft at 7 seconds.
.SUN...N winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to
3 ft. Wave Detail: NW 2 ft at 4 seconds and S 2 ft at 7 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W 20 to 25 kt after
midnight. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and S
2 ft at 7 seconds.
.MON AND MON NIGHT...N winds 20 to 25 kt with gusts up to 30 kt.
Seas 2 to 4 ft. Wave Detail: N 4 ft at 5 seconds and SW 2 ft at
6 seconds.
.TUE...W 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 NE 1 foot at
3 seconds.
.TUE NIGHT...SW winds 25 to 30 kt. Seas 4 to 6 ft.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. A chance of rain.
.WED NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas
6 to 9 ft. A chance of rain.

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.

$$

ANZ237-070700-
Block Island Sound-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...W winds around 10 kt. Seas around 2 ft. Wave
Detail: W 1 foot at 3 seconds and SE 1 foot at 4 seconds.
.TONIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 9 seconds and W 1 foot at 3 seconds.
.SUN...N winds 5 to 10 kt, becoming SE in the afternoon. Seas
2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and SE 2 ft at
9 seconds.
.SUN NIGHT...SW winds 10 to 15 kt, becoming NW 15 to 20 kt with
gusts up to 25 kt after midnight. Seas 2 to 4 ft. Wave Detail: W
3 ft at 4 seconds and SE 3 ft at 8 seconds.
.MON AND MON NIGHT...N winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: N 3 ft at 4 seconds and SE 2 ft at
8 seconds.
.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
3 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at
4 seconds.
.TUE NIGHT...SW winds 20 to 25 kt. Seas 3 to 5 ft.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. A chance of rain.
.WED NIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas
5 to 7 ft. A chance of rain.

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.

$$

ANZ230-070700-
Boston Harbor-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...SW winds 5 to 10 kt. Waves 1 foot or less.
.TONIGHT...W winds 5 to 10 kt. Waves 1 foot or less.
.SUN...NW winds 5 to 10 kt. Waves 1 foot or less.
.SUN NIGHT...S winds 5 to 10 kt, becoming W 15 to 20 kt after
midnight. Waves 1 foot or less, then around 2 ft after midnight.
.MON AND MON NIGHT...NW winds 20 to 25 kt. Waves around 2 ft.
.TUE AND TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to
20 kt. Waves around 2 ft.
.WED AND WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft. A chance of rain.

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.

$$

ANZ236-070700-
Narragansett Bay-
104 PM EST Sat Dec 6 2025

.THIS AFTERNOON...SW winds 5 to 10 kt. Waves 1 foot or less.
.TONIGHT...NW winds 5 to 10 kt. Waves around 2 ft.
.SUN...NW winds around 5 kt, becoming E in the afternoon. Waves
around 2 ft.
.SUN NIGHT...SW winds 5 to 10 kt, becoming W 10 to 15 kt with
gusts up to 20 kt after midnight. Waves 2 to 3 ft.
.MON AND MON NIGHT...N winds 15 to 20 kt with gusts up to 25 kt.
Waves 2 to 3 ft.
.TUE AND TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to
20 kt. Gusts up to 25 kt. Waves 2 to 3 ft.
.WED...SW winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to
4 ft. A chance of rain.
.WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
3 to 5 ft. A chance of rain.

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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