152
FZUS51 KBOX 190205
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1005 PM EDT Fri Jul 18 2025

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

ANZ200-191500-
1005 PM EDT Fri Jul 18 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres moves in tonight and remains Sat. The high will move
offshore Sun then another cold front will cross the waters Sun
night. High pres will build into the region Mon and Tue, moving
offshore Wed.

$$

ANZ250-191500-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...W winds around 5 kt. Seas around 2 ft. Wave Detail:
N 1 foot at 4 seconds and S 1 foot at 5 seconds.
.SAT...S winds around 5 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft
at 3 seconds and N 1 foot at 4 seconds.
.SAT NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and E 1 foot at
9 seconds. A chance of showers after midnight.
.SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: S 3 ft at 4 seconds and E 1 foot at 9 seconds.
A chance of tstms. A chance of showers in the morning, then
showers likely in the afternoon.
.SUN NIGHT...W winds 10 to 15 kt, becoming NW after midnight.
Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at
4 seconds and S 2 ft at 4 seconds. A chance of showers and tstms
in the evening.
.MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and S 1 foot at
5 seconds.
.TUE THROUGH WED NIGHT...S winds 15 to 20 kt with gusts up to
25 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ251-191500-
Massachusetts Bay and Ipswich Bay-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...W winds around 5 kt. Seas 1 foot or less. Wave
Detail: N 1 foot at 4 seconds and S 1 foot at 4 seconds.
.SAT...E winds around 5 kt, becoming SE 10 to 15 kt in the
afternoon. Seas 1 foot or less, then 2 to 3 ft in the afternoon.
Wave Detail: N 1 foot at 4 seconds and S 1 foot at 5 seconds,
becoming SE 2 ft at 3 seconds and N 1 foot at 4 seconds.
.SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 foot at
9 seconds. A chance of showers after midnight.
.SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 foot at
9 seconds. A chance of showers in the morning, then showers
likely with a chance of tstms in the afternoon.
.SUN NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and
SE 2 ft at 4 seconds. A chance of showers and tstms in the
evening.
.MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot
at 5 seconds.
.TUE THROUGH WED NIGHT...S winds 15 to 20 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ231-191500-
Cape Cod Bay-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...SW winds around 5 kt. Seas 1 foot or less. Wave
Detail: N 1 foot at 4 seconds and S 1 foot at 6 seconds.
.SAT...S winds around 5 kt, increasing to 10 to 15 kt in the
afternoon. Seas 1 foot or less, then around 2 ft in the
afternoon. Wave Detail: N 1 foot at 5 seconds and S 1 foot at
6 seconds, becoming S 1 foot at 3 seconds and N 1 foot at
4 seconds.
.SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: S 1 foot at 3 seconds and NW 1 foot at
4 seconds. A chance of showers after midnight.
.SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SE 2 ft at 3 seconds and W 1 foot at
3 seconds. A chance of showers. A chance of tstms in the
afternoon.
.SUN NIGHT...W winds 10 to 15 kt, becoming NW after midnight.
Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at
3 seconds and SE 1 foot at 3 seconds. A chance of showers and
tstms in the evening.
.MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at
5 seconds.
.TUE THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ254-191500-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 7 seconds and N 1 foot at 4 seconds.
.SAT...SW winds around 5 kt, becoming S 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and N
1 foot at 5 seconds.
.SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and NW 1 foot at
3 seconds. A chance of showers after midnight.
.SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at
9 seconds. A chance of showers. A chance of tstms in the
afternoon.
.SUN NIGHT...SW winds 10 to 15 kt, becoming NW after midnight.
Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at
5 seconds and NW 2 ft at 4 seconds. A chance of showers and tstms
in the evening.
.MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and S 2 ft at
5 seconds.
.TUE THROUGH WED NIGHT...S winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ255-191500-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...S winds around 5 kt. Seas 2 to 3 ft. Wave Detail: S
3 ft at 7 seconds and N 1 foot at 3 seconds.
.SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and N
1 foot at 4 seconds.
.SAT NIGHT...S winds around 10 kt with gusts up to 20 kt. Seas
2 to 4 ft. Wave Detail: S 2 ft at 6 seconds and SE 1 foot at
9 seconds. A chance of showers after midnight.
.SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at
8 seconds. A chance of showers.
.SUN NIGHT...SW winds 10 to 15 kt, becoming NW after midnight.
Gusts up to 20 kt. Seas around 3 ft. Wave Detail: SW 3 ft at
5 seconds and NW 2 ft at 4 seconds. A chance of showers in the
evening.
.MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 2 ft at
5 seconds.
.TUE THROUGH WED NIGHT...S 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.

$$

ANZ256-191500-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S
3 ft at 7 seconds and E 1 foot at 10 seconds.
.SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and
SE 1 foot at 10 seconds.
.SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: S 3 ft at 6 seconds and SE 1 foot at
9 seconds. A chance of showers after midnight.
.SUN...S 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 SE 1 foot at
9 seconds. A chance of showers and tstms.
.SUN NIGHT...W winds 10 to 15 kt, becoming NW after midnight.
Gusts up to 20 kt. Seas around 3 ft. Wave Detail: SW 3 ft at
5 seconds and NW 2 ft at 4 seconds. A chance of showers and tstms
in the evening.
.MON AND MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and S 2 ft at
5 seconds.
.TUE THROUGH WED NIGHT...S winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ232-191500-
Nantucket Sound-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail:
N 1 foot at 3 seconds and SW 1 foot at 7 seconds.
.SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and
NW 1 foot at 4 seconds.
.SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and N 1 foot at
4 seconds. A chance of showers after midnight.
.SUN...S 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 SE 1 foot at
9 seconds. A chance of showers and tstms.
.SUN NIGHT...W winds 10 to 15 kt, becoming NW after midnight.
Gusts up to 20 kt. Seas around 2 ft. Wave Detail: NW 2 ft at
3 seconds and SW 2 ft at 4 seconds. A chance of showers and tstms
in the evening.
.MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot
at 5 seconds.
.TUE THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas around 2 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ233-191500-
Vineyard Sound-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 6 seconds and N 1 foot at 4 seconds.
.SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds
and N 1 foot at 4 seconds.
.SAT NIGHT...S winds around 10 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and
SE 1 foot at 9 seconds. A chance of showers after midnight.
.SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at
8 seconds. A chance of showers and tstms.
.SUN NIGHT...W winds 10 to 15 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot
at 9 seconds. A chance of showers and tstms in the evening.
.MON AND MON NIGHT...N winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: N 1 foot at 4 seconds and SW 1 foot at 5 seconds.
.TUE THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas around 2 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ234-191500-
Buzzards Bay-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 6 seconds and N 1 foot at 3 seconds.
.SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds
and N 1 foot at 4 seconds.
.SAT NIGHT...S winds around 10 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and
SE 1 foot at 9 seconds. A chance of showers after midnight.
.SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at
9 seconds. A chance of showers and tstms.
.SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at
4 seconds and SE 1 foot at 9 seconds. A chance of showers and
tstms in the evening.
.MON AND MON NIGHT...N winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: N 1 foot at 3 seconds and SW 1 foot at 5 seconds.
.TUE THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ235-191500-
Rhode Island Sound-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S
3 ft at 7 seconds and E 1 foot at 10 seconds.
.SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and
SE 1 foot at 10 seconds.
.SAT NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 4 ft. Wave Detail: S 3 ft at 5 seconds and SE
1 foot at 8 seconds. A chance of showers after midnight.
.SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at
8 seconds. A chance of showers and tstms.
.SUN NIGHT...W winds 10 to 15 kt, becoming NW with gusts up to
20 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at
5 seconds and NW 2 ft at 3 seconds. A chance of showers and tstms
in the evening.
.MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and S 2 ft at
5 seconds.
.TUE THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ237-191500-
Block Island Sound-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...W winds around 5 kt, becoming NE. Seas around 2 ft.
Wave Detail: S 2 ft at 7 seconds and W 1 foot at 3 seconds.
.SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and
SE 1 foot at 9 seconds.
.SAT NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and SE
1 foot at 9 seconds. A chance of showers after midnight.
.SUN...S 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
9 seconds. A chance of showers. A chance of tstms in the
afternoon.
.SUN NIGHT...W winds 10 to 15 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and S 2 ft at
5 seconds. A chance of showers and tstms in the evening.
.MON AND MON NIGHT...N winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: N 2 ft at 3 seconds and S 2 ft at 5 seconds.
.TUE THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

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.

$$

ANZ230-191500-
Boston Harbor-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...W winds around 5 kt. Waves 1 foot or less.
.SAT...NE winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less.
.SAT NIGHT...S winds around 10 kt. Waves around 2 ft. A chance of
showers after midnight.
.SUN...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves around 2 ft. A chance of showers in the morning, then
showers likely with a chance of tstms in the afternoon.
.SUN NIGHT...NW winds 10 to 15 kt. Waves around 2 ft. Showers
likely with a chance of tstms in the evening.
.MON AND MON NIGHT...N winds 10 to 15 kt. Waves around 2 ft.
.TUE THROUGH WED NIGHT...S winds 10 to 15 kt with gusts up to
20 kt. Waves around 2 ft.

Winds and waves higher in and near tstms.

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.

$$

ANZ236-191500-
Narragansett Bay-
1005 PM EDT Fri Jul 18 2025

.OVERNIGHT...W winds around 5 kt, becoming N. Waves around 2 ft.
.SAT...SE winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Waves around 2 ft.
.SAT NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of
showers after midnight.
.SUN...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves around 2 ft. A chance of showers. A chance of tstms in the
afternoon.
.SUN NIGHT...W winds around 10 kt, becoming NW after midnight.
Waves around 2 ft. A chance of showers and tstms in the evening.
.MON AND MON NIGHT...N 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.

Winds and waves higher in and near tstms.

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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