437
FZUS51 KBOX 121706
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
105 PM EDT Sat Jul 12 2025

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

ANZ200-130600-
105 PM EDT Sat Jul 12 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres dominates this weekend. Cold front moves through Mon
bringing a period of unsettled weather through the week.

$$

ANZ250-130600-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
105 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...SE winds around 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 8 seconds and SE 1 foot at 4 seconds. Patchy
fog. Vsby 1 to 3 NM.
.TONIGHT...SE winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SE 1 foot
at 4 seconds. Patchy fog. Vsby 1 NM or less.
.SUN...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 6 seconds. Patchy fog in the morning with vsby 1 NM or less.
.SUN NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt,
becoming S 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: E 2 ft at 6 seconds and S 1 foot at 3 seconds.
.MON...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at
7 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 7 seconds and S
1 foot at 3 seconds.
.TUE THROUGH WED 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.

$$

ANZ251-130600-
Massachusetts Bay and Ipswich Bay-
105 PM EDT Sat Jul 12 2025

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

$$

ANZ231-130600-
Cape Cod Bay-
105 PM EDT Sat Jul 12 2025

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

$$

ANZ254-130600-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
105 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...SE winds around 10 kt. Seas 2 to 3 ft. Wave
Detail: S 3 ft at 8 seconds and E 1 foot at 5 seconds. Patchy
fog. Vsby 1 NM or less.
.TONIGHT...SE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: S
3 ft at 8 seconds and E 1 foot at 5 seconds. Patchy fog. Vsby
1 NM or less.
.SUN...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 8 seconds and E 1 foot at 6 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds.
.MON...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 7 seconds and E 1 foot at 8 seconds.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds.
.TUE THROUGH WED 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.

$$

ANZ255-130600-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
105 PM EDT Sat Jul 12 2025

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

$$

ANZ256-130600-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
105 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...E winds around 10 kt. Seas around 3 ft. Wave
Detail: S 3 ft at 7 seconds.
.TONIGHT...E winds around 10 kt. Seas around 3 ft. Wave Detail: S
3 ft at 8 seconds. Patchy fog. Vsby 1 NM or less.
.SUN...E winds around 10 kt. Seas around 3 ft. Wave Detail: S
3 ft at 7 seconds and E 2 ft at 4 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 6 seconds and SE 2 ft at 9 seconds.
.MON...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 8 seconds.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 6 seconds.
.TUE THROUGH WED...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.
.WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 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.

$$

ANZ232-130600-
Nantucket Sound-
105 PM EDT Sat Jul 12 2025

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

$$

ANZ233-130600-
Vineyard Sound-
105 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...SE winds around 10 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 7 seconds and E 1 foot at 3 seconds.
.TONIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 8 seconds and E 1 foot at 2 seconds. Patchy fog. Vsby
1 NM or less.
.SUN...E winds around 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 7 seconds and E 1 foot at 3 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 7 seconds and E 1 foot at 3 seconds.
.MON AND MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 1 foot at 6 seconds.
.TUE THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 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.

$$

ANZ234-130600-
Buzzards Bay-
105 PM EDT Sat Jul 12 2025

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

$$

ANZ235-130600-
Rhode Island Sound-
105 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...SE winds around 10 kt. Seas 2 to 3 ft. Wave
Detail: S 3 ft at 7 seconds and E 1 foot at 4 seconds.
.TONIGHT...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: S
3 ft at 7 seconds and E 1 foot at 3 seconds. Patchy fog. Vsby
1 NM or less.
.SUN...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 8 seconds and E 1 foot at 3 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 4 seconds and S 2 ft at 7 seconds.
.MON AND MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 6 seconds.
.TUE THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 4 ft. Wave Detail: SE 4 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.

$$

ANZ237-130600-
Block Island Sound-
105 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...E winds around 10 kt. Seas 2 to 3 ft. Wave
Detail: S 3 ft at 8 seconds.
.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds and E 1 foot at 2 seconds. Patchy fog. Vsby
1 NM or less.
.SUN...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and E 1 foot at 4 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 6 seconds.
.MON AND MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 6 seconds.
.TUE THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 6 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.

$$

ANZ230-130600-
Boston Harbor-
105 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...SE winds 10 to 15 kt. Waves around 2 ft.
.TONIGHT...SE winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Waves around 2 ft in the evening, then 1 foot or less.
Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after
midnight.
.SUN...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Waves 1 foot or less, then around
2 ft in the afternoon. Patchy fog in the morning with vsby 1 NM
or less.
.SUN NIGHT...SE winds 10 to 15 kt, becoming S 5 to 10 kt after
midnight. Waves around 2 ft in the evening, then 1 foot or less.
.MON...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon. A chance of showers in the afternoon.
.MON NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.TUE THROUGH WED 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.

$$

ANZ236-130600-
Narragansett Bay-
105 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Waves around 2 ft.
.TONIGHT...SE winds 5 to 10 kt. Waves around 2 ft. Patchy fog.
Vsby 1 NM or less.
.SUN...E winds 5 to 10 kt. Waves around 2 ft. Patchy fog in the
morning with vsby 1 to 3 NM.
.SUN NIGHT...SE winds 5 to 10 kt. Waves around 2 ft.
.MON AND MON NIGHT...SW winds 5 to 10 kt. Waves around 2 ft.
.TUE THROUGH WED NIGHT...SW 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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