Coastal Waters Forecast
Issued by NWS Boston, MA

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FZUS51 KBOX 200202
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1001 PM EDT Fri Apr 19 2024

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

ANZ200-201500-
1001 PM EDT Fri Apr 19 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres over the waters south of Nova Scotia continues to
move eastward tonight. A cold front then brings showers and a period
of breezy conditions for Sat. High pres then returns for Sun and
Mon, though with W to NW breezes.

$$

ANZ250-201500-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds around 10 kt with gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: SE 3 ft at 4 seconds and E 1 ft at
11 seconds. Patchy fog. A chance of showers.
.SAT...SW winds 5 to 10 kt. Gusts up to 20 kt in the morning.
Seas 2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and E 1 ft at
4 seconds. Patchy fog. Showers in the morning. A chance of
showers in the afternoon. Vsby 1 NM or less.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at
5 seconds. A chance of showers in the evening with vsby 1 to
3 NM.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW in
the afternoon. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds
and SE 2 ft at 6 seconds.
.SUN 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 SE 2 ft at
7 seconds.
.MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.
.TUE AND TUE NIGHT...S winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft.
.WED AND WED NIGHT...S winds around 15 kt, becoming SW. Gusts up
to 30 kt. Seas 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.

$$

ANZ251-201500-
Massachusetts Bay and Ipswich Bay-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds around 10 kt. Gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: S 3 ft at 4 seconds and E 2 ft at 4 seconds.
Patchy fog. A chance of showers.
.SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft
at 4 seconds and E 1 ft at 5 seconds. Patchy fog. Showers in the
morning. A chance of showers in the afternoon. Vsby 1 to 3 NM.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 ft at
5 seconds. A chance of showers in the evening.
.SUN...W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 ft at
6 seconds.
.SUN NIGHT...W winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and
SE 1 ft at 6 seconds.
.MON AND MON NIGHT...NW winds 15 to 20 kt. Seas around 2 ft.
.TUE AND TUE NIGHT...S winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 3 ft.
.WED AND WED NIGHT...S winds around 15 kt, becoming W. 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.

$$

ANZ231-201500-
Cape Cod Bay-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
1 ft at 3 seconds and S 1 ft at 3 seconds. Patchy fog. A chance
of showers with vsby 1 to 3 NM.
.SAT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 4 seconds and E 1 ft at 4 seconds. Patchy fog. Showers. Vsby
1 to 3 NM, decreasing to 1 NM or less in the afternoon.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 ft at
6 seconds.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW in
the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at
4 seconds and SE 1 ft at 6 seconds.
.SUN NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SW 1 ft at 3 seconds and SE 1 ft at 6 seconds.
.MON AND MON NIGHT...N winds 10 to 15 kt. Seas around 2 ft.
.TUE AND TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft.
.WED...S winds around 15 kt with gusts up to 25 kt. Seas around
2 ft. A chance of rain.
.WED NIGHT...W winds around 15 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.

$$

ANZ254-201500-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds around 10 kt. Seas 3 to 4 ft. Wave Detail:
SE 4 ft at 5 seconds and E 2 ft at 11 seconds. Patchy fog. A
chance of showers with vsby 1 to 3 NM.
.SAT...S winds around 10 kt, becoming SW in the afternoon. Seas
2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and E 2 ft at
11 seconds. Patchy fog. Showers likely. Vsby 1 NM or less.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and SE 3 ft at
6 seconds. Patchy fog in the evening with vsby 1 to 3 NM.
.SUN...NW winds 10 to 15 kt with gusts up to 20 kt, becoming SW
in the afternoon. Seas 3 to 4 ft. Wave Detail: NW 3 ft at
4 seconds and SE 2 ft at 6 seconds.
.SUN NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: S
2 ft at 5 seconds and E 1 ft at 11 seconds.
.MON AND MON NIGHT...E winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.
.TUE THROUGH WED...S winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 4 ft.
.WED NIGHT...SW winds around 15 kt with gusts up to 25 kt. Seas
4 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.

$$

ANZ255-201500-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE
4 ft at 7 seconds and E 1 ft at 4 seconds. Patchy fog. A chance
of showers with vsby 1 to 3 NM.
.SAT...S winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to
4 ft. Wave Detail: SE 4 ft at 6 seconds and W 2 ft at 4 seconds.
Patchy fog. A chance of showers in the morning. Showers likely in
the afternoon. Vsby 1 NM or less.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and SE 3 ft at
7 seconds. Patchy fog in the evening. A chance of showers in the
evening with vsby 1 to 3 NM.
.SUN...NW winds 10 to 15 kt, becoming W 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft
at 5 seconds and SE 2 ft at 6 seconds.
.SUN NIGHT AND MON...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and SE 2 ft at
7 seconds.
.MON NIGHT...S winds 5 to 10 kt, becoming E after midnight. Seas
around 2 ft.
.TUE THROUGH WED...S winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 4 ft.
.WED NIGHT...W winds around 15 kt with gusts up to 25 kt. Seas
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.

$$

ANZ256-201500-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds 5 to 10 kt. Seas around 4 ft. Wave Detail:
SE 4 ft at 7 seconds and E 1 ft at 11 seconds. Patchy fog. A
chance of showers with vsby 1 to 3 NM.
.SAT...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft
at 7 seconds and W 2 ft at 4 seconds. Patchy fog. Showers likely,
mainly in the morning. Vsby 1 NM or less, increasing to 1 to 3 NM
in the afternoon.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE 3 ft at
7 seconds.
.SUN...NW winds 10 to 15 kt, becoming W 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NW
3 ft at 4 seconds and SE 2 ft at 7 seconds.
.SUN NIGHT AND MON...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at
7 seconds.
.MON NIGHT...W winds around 10 kt, becoming N after midnight.
Seas around 2 ft.
.TUE AND TUE NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.
.WED AND WED NIGHT...S winds around 15 kt, becoming W. Gusts up
to 25 kt. Seas 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.

$$

ANZ232-201500-
Nantucket Sound-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 4 seconds and E 1 ft at 4 seconds. Patchy fog. A chance
of showers with vsby 1 to 3 NM.
.SAT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 4 seconds and E 1 ft at 5 seconds. Patchy fog. Showers
likely. Vsby 1 NM or less.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 ft at
6 seconds. Patchy fog in the evening with vsby 1 to 3 NM.
.SUN...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and
SE 1 ft at 6 seconds.
.SUN NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE
1 ft at 6 seconds.
.MON AND MON NIGHT...N winds 10 to 15 kt. Seas 1 foot or less.
.TUE THROUGH WED...S winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 3 ft.
.WED NIGHT...W winds around 15 kt with gusts up to 25 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.

$$

ANZ233-201500-
Vineyard Sound-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 6 seconds and S 1 ft at 3 seconds. Patchy fog. A chance
of showers with vsby 1 to 3 NM.
.SAT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 4 seconds and SE 2 ft at 6 seconds. Patchy fog. Showers.
Vsby 1 to 3 NM.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: W 2 ft at 4 seconds and S 2 ft at
7 seconds.
.SUN...W winds 10 to 15 kt, becoming SW 20 to 25 kt in the
afternoon. Seas 2 to 4 ft. Wave Detail: W 2 ft at 4 seconds and S
1 ft at 7 seconds.
.SUN NIGHT AND MON...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: SW 2 ft at 4 seconds and S 1 ft at
7 seconds.
.MON NIGHT...SW winds around 10 kt, becoming N after midnight.
Seas 1 foot or less.
.TUE AND TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 1 foot or less, then around 2 ft.
.WED AND WED NIGHT...S winds around 15 kt, becoming W. 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.

$$

ANZ234-201500-
Buzzards Bay-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 4 seconds and SE 1 ft at 3 seconds. Patchy fog. A chance
of showers with vsby 1 to 3 NM.
.SAT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and SE 2 ft at 6 seconds. Patchy fog. Showers.
Vsby 1 to 3 NM.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 ft at
5 seconds.
.SUN...W winds around 10 kt, becoming SW 20 to 25 kt in the
afternoon. Seas 2 to 4 ft. Wave Detail: W 2 ft at 4 seconds and
SE 1 ft at 6 seconds.
.SUN NIGHT AND MON...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 ft at
7 seconds.
.MON NIGHT...SW winds around 10 kt, becoming N after midnight.
Seas 1 foot or less.
.TUE AND TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 1 foot or less, then around 2 ft.
.WED AND WED NIGHT...S winds around 15 kt, becoming W. 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.

$$

ANZ235-201500-
Rhode Island Sound-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds and SE 1 ft at 14 seconds. Patchy fog. A chance
of showers with vsby 1 to 3 NM.
.SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds and SW 2 ft at 4 seconds. Patchy fog. Showers in the
morning. A chance of showers in the afternoon. Vsby 1 to 3 NM.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at
7 seconds.
.SUN...W winds 10 to 15 kt, becoming SW 20 to 25 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and
SE 2 ft at 7 seconds.
.SUN NIGHT AND MON...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at
7 seconds.
.MON NIGHT...W winds around 10 kt, becoming N after midnight.
Seas around 2 ft.
.TUE AND TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.
.WED AND WED NIGHT...S winds around 15 kt, becoming W. 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.

$$

ANZ237-201500-
Block Island Sound-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds and E 1 ft at 3 seconds. Patchy fog. A chance
of showers with vsby 1 to 3 NM.
.SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds and W 2 ft at 3 seconds. Patchy fog. Showers likely,
mainly in the morning. Vsby 1 NM or less, increasing to 1 to 3 NM
in the afternoon.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 30 kt. Seas
2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at
7 seconds.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 7 seconds.
.SUN NIGHT AND MON...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at
7 seconds.
.MON NIGHT...W winds around 10 kt, becoming N after midnight.
Seas around 2 ft in the evening, then 1 foot or less.
.TUE AND TUE NIGHT...SE winds 5 to 10 kt, becoming S 10 to 15 kt.
Gusts up to 20 kt. Seas 2 to 3 ft.
.WED AND WED NIGHT...S winds around 15 kt, becoming W. 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.

$$

ANZ230-201500-
Boston Harbor-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds 5 to 10 kt. Waves 1 foot or less. Patchy
fog. A chance of showers.
.SAT...SW winds 5 to 10 kt. Waves 1 foot or less. Patchy fog.
Showers. Vsby 1 to 3 NM.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves
around 2 ft. A chance of showers in the evening.
.SUN...W winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Waves around 2 ft.
.SUN NIGHT...W winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. Waves around 2 ft.
.MON AND MON NIGHT...W winds 15 to 20 kt. Waves around 2 ft.
.TUE AND TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.WED AND WED NIGHT...S winds around 15 kt, becoming W. Gusts up
to 25 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.

$$

ANZ236-201500-
Narragansett Bay-
1001 PM EDT Fri Apr 19 2024

.OVERNIGHT...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog. A
chance of showers with vsby 1 to 3 NM.
.SAT...SW winds 5 to 10 kt. Waves around 2 ft. Patchy fog.
Showers. Vsby 1 NM or less, increasing to 1 to 3 NM in the
afternoon.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves
around 2 ft.
.SUN...W winds around 10 kt, becoming SW 15 to 20 kt in the
afternoon. Waves 2 to 3 ft.
.SUN NIGHT AND MON...W winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 3 ft.
.MON NIGHT...W winds around 10 kt, becoming NW after midnight.
Waves 1 foot or less.
.TUE AND TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.WED AND WED NIGHT...S winds 10 to 15 kt, becoming W. Gusts up to
25 kt. Waves 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.

$$

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