Coastal Waters Forecast
Issued by NWS Boston, MA

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FZUS51 KBOX 190802
CWFBOX

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

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

ANZ200-192100-
402 AM EDT Fri Apr 19 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres builds over the waters today, but shifts toward Nova
Scotia by late in the day. A cold front crosses the waters on Sat
bringing rain showers and gusty winds. High pres nudges in as we
head into next week. Will have gusty winds as we head into early
next week.

$$

ANZ250-192100-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
402 AM EDT Fri Apr 19 2024

.TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 5 seconds and E 2 ft at 11 seconds.
.TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: SE 3 ft at 4 seconds and E 2 ft at 11 seconds.
Patchy fog after midnight. Showers likely after midnight.
.SAT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Seas 2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and E
1 ft at 4 seconds. Showers, mainly in the morning. Patchy fog in
the morning with vsby 1 to 3 NM.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at
5 seconds.
.SUN AND SUN 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
6 seconds.
.MON AND MON NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt,
becoming SE. Seas 2 to 3 ft.
.TUE AND TUE NIGHT...S winds 15 to 20 kt with gusts up to 25 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.

$$

ANZ251-192100-
Massachusetts Bay and Ipswich Bay-
402 AM EDT Fri Apr 19 2024

.TODAY...E winds 5 to 10 kt, becoming SE 10 to 15 kt this
afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 5 seconds and
E 1 ft at 11 seconds.
.TONIGHT...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 SE 2 ft at 4 seconds.
Patchy fog after midnight. Showers after midnight.
.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. Showers, mainly in the
morning. Patchy fog in the morning with 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 3 seconds and SE 1 ft at
5 seconds.
.SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
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 10 to 15 kt with gusts up to 20 kt,
becoming SE. Seas around 2 ft.
.TUE AND TUE NIGHT...S winds 10 to 15 kt with gusts up to 25 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.

$$

ANZ231-192100-
Cape Cod Bay-
402 AM EDT Fri Apr 19 2024

.TODAY...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 6 seconds and E 1 ft at 3 seconds.
.TONIGHT...S winds around 10 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. Wave Detail: SE 1 ft at 3 seconds and
S 1 ft at 4 seconds. Patchy fog after midnight. Showers likely
after midnight.
.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 in the morning.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 ft at
6 seconds.
.SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and SE 1 ft
at 6 seconds.
.MON THROUGH TUE NIGHT...S winds 10 to 15 kt with gusts up to
25 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.

$$

ANZ254-192100-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
402 AM EDT Fri Apr 19 2024

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

$$

ANZ255-192100-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
402 AM EDT Fri Apr 19 2024

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON...

.TODAY...E winds 10 to 15 kt. Gusts up to 20 kt this morning.
Seas 3 to 4 ft. Wave Detail: SE 4 ft at 7 seconds and E 1 ft at
4 seconds.
.TONIGHT...SE winds around 10 kt. Gusts up to 20 kt in the
evening. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 7 seconds and E
1 ft at 4 seconds. Patchy fog after midnight. A chance of showers
after midnight.
.SAT...S winds around 10 kt, becoming W in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 6 seconds and W 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 20 kt. Seas
2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and SE 3 ft at
7 seconds.
.SUN AND SUN NIGHT...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
6 seconds.
.MON THROUGH TUE 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.

$$

ANZ256-192100-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
402 AM EDT Fri Apr 19 2024

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON...

.TODAY...E winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Seas 3 to 5 ft. Wave Detail: SE 4 ft at 7 seconds and NE 1 ft at
3 seconds.
.TONIGHT...SE winds around 10 kt. Gusts up to 20 kt in the
evening. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 7 seconds and E
1 ft at 11 seconds. Patchy fog after midnight. Showers likely
after midnight.
.SAT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft
at 7 seconds and W 2 ft at 4 seconds. Showers, mainly in the
morning. Patchy fog in the morning with vsby 1 to 3 NM.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 3 ft at
7 seconds.
.SUN AND SUN NIGHT...W winds 15 to 20 kt with 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.
.MON THROUGH TUE NIGHT...S winds 10 to 15 kt with gusts up to
25 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.

$$

ANZ232-192100-
Nantucket Sound-
402 AM EDT Fri Apr 19 2024

.TODAY...E winds around 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 5 seconds and E 1 ft at 12 seconds.
.TONIGHT...SE winds around 10 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 4 seconds and E 2 ft at 4 seconds. Patchy fog after
midnight. Showers likely after midnight.
.SAT...S winds around 10 kt, becoming W in the afternoon. Seas
around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 ft at
5 seconds. Patchy fog. Showers. Vsby 1 to 3 NM.
.SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and
SE 1 ft at 6 seconds.
.SUN AND SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 ft at
6 seconds.
.MON THROUGH TUE NIGHT...S 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.

$$

ANZ233-192100-
Vineyard Sound-
402 AM EDT Fri Apr 19 2024

.TODAY...E winds around 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds and E 1 ft at 2 seconds.
.TONIGHT...S winds around 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 6 seconds and S 1 ft at 3 seconds. Patchy fog after
midnight. Showers likely after midnight.
.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 in the morning.
.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 AND SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: W 2 ft at 4 seconds and S 1 ft at
7 seconds.
.MON THROUGH TUE NIGHT...S 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.

$$

ANZ234-192100-
Buzzards Bay-
402 AM EDT Fri Apr 19 2024

.TODAY...E winds 5 to 10 kt, becoming SE this afternoon. Seas
2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds and E 1 ft at
2 seconds.
.TONIGHT...S winds around 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 4 seconds and SE 1 ft at 3 seconds. Patchy fog after
midnight. Showers likely after midnight.
.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. Showers, mainly in
the morning. Patchy fog in the morning with 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 AND SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 ft at
6 seconds.
.MON THROUGH TUE NIGHT...S 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.

$$

ANZ235-192100-
Rhode Island Sound-
402 AM EDT Fri Apr 19 2024

.TODAY...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds and NE 1 ft at 3 seconds.
.TONIGHT...SE winds around 10 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and E
1 ft at 3 seconds. Patchy fog after midnight. Showers likely
after midnight.
.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. Showers, mainly in the
morning. Patchy fog in the morning with vsby 1 to 3 NM.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at
7 seconds.
.SUN AND SUN NIGHT...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 THROUGH TUE NIGHT...S winds 10 to 15 kt with gusts up to
25 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.

$$

ANZ237-192100-
Block Island Sound-
402 AM EDT Fri Apr 19 2024

.TODAY...E winds around 10 kt. Seas 2 to 4 ft. Wave Detail: SE
4 ft at 7 seconds and E 1 ft at 4 seconds.
.TONIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and E 1 ft at
4 seconds. Patchy fog after midnight. Showers likely after
midnight 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. Showers, mainly in the
morning. Patchy fog in the morning with vsby 1 to 3 NM.
.SAT NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at
7 seconds.
.SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at
7 seconds.
.MON THROUGH TUE NIGHT...S winds 10 to 15 kt with gusts up to
25 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.

$$

ANZ230-192100-
Boston Harbor-
402 AM EDT Fri Apr 19 2024

.TODAY...E winds around 5 kt, becoming SE 10 to 15 kt with gusts
up to 20 kt this afternoon. Waves 1 foot or less, then around
2 ft this afternoon.
.TONIGHT...S winds around 10 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft. Showers after midnight.
.SAT...SW winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon. Showers, mainly in the morning. Patchy fog
in the morning with vsby 1 to 3 NM.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves
around 2 ft.
.SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.MON THROUGH TUE NIGHT...S winds 10 to 15 kt with gusts up to
25 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.

$$

ANZ236-192100-
Narragansett Bay-
402 AM EDT Fri Apr 19 2024

.TODAY...E winds 5 to 10 kt, becoming SE this afternoon. Waves
2 to 3 ft.
.TONIGHT...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog
after midnight. Showers after midnight.
.SAT...SW winds 5 to 10 kt. Waves around 2 ft. Showers, mainly in
the morning. Patchy fog in the morning with vsby 1 to 3 NM.
.SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves
around 2 ft.
.SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 3 ft.
.MON THROUGH TUE NIGHT...S 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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