HomeForecastsNew York ForecastsOld Greenwich, CT Coastal Forecast

Old Greenwich, CT Coastal Forecast

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Coastal Waters Forecast
National Weather Service New York NY
447 AM EDT Thu May 29 2025

Montauk Point NY to Sandy Hook NJ out 20 nm offshore, including
Long Island Sound, the Long Island Bays, and New York Harbor

ANZ300-292130-
447 AM EDT Thu May 29 2025

.Synopsis for the Long Island and Connecticut coastal waters...
Weak low pressure off the southern New Jersey coast will pass
south of Long Island this morning and head east of New England
tonight. Another weak low over the Mid Atlantic region will
affect the area on Friday. A stronger low developing over the
Mid Atlantic region on Friday will pass over the area Friday
night and then head north into New England on Saturday.
A trailing cold front will move through Saturday night. This low
will then meander over eastern early next week as high pressure
builds from the west.

$$

ANZ350-292130-
Moriches Inlet NY to Montauk Point NY out 20 nm-
447 AM EDT Thu May 29 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.TODAY...E winds 15 to 20 kt, becoming NE 10 to 15 kt this
afternoon. Seas 2 to 3 ft, building to 5 to 6 ft, occasionally to
8 ft. Wave Detail: SE 3 ft at 4 seconds and SE 1 ft at 9 seconds,
becoming SE 6 ft at 8 seconds. Rain early, mainly this morning.
Patchy fog with vsby 1 to 3 nm.
.TONIGHT...W winds 5 to 10 kt, becoming SW 10 to 15 kt after
midnight. Seas 4 to 5 ft, occasionally to 6 ft. Wave Detail: S
5 ft at 8 seconds.
.FRI...SW winds 10 to 15 kt. Seas 3 to 4 ft, occasionally to
5 ft. Wave Detail: S 4 ft at 8 seconds. Chance of showers.
.FRI NIGHT...S winds 10 to 15 kt. Seas around 3 ft. Wave Detail:
S 3 ft at 7 seconds. Patchy fog in the evening. Showers and
chance of tstms. Vsby 1 to 3 nm.
.SAT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft, occasionally to 6 ft, building to 5 to 8 ft, occasionally
to 10 ft in the afternoon. Wave Detail: S 5 ft at 7 seconds,
becoming SW 7 ft at 8 seconds. Showers likely with chance of
tstms in the morning, then showers likely in the afternoon. Vsby
1 to 3 nm.
.SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 5 to 7 ft, occasionally to 9 ft. Wave
Detail: S 7 ft at 8 seconds. Chance of showers.
.SUN...W winds around 15 kt with gusts up to 20 kt. Seas 4 to
5 ft, occasionally to 6 ft.
.SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft, occasionally to 5 ft.
.MON...SW winds 5 to 10 kt. Seas 3 to 4 ft, occasionally to 5 ft.
.MON NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft, occasionally to
5 ft.

Winds and seas may be higher in and near tstms.

$$

ANZ353-292130-
Fire Island Inlet NY to Moriches Inlet NY out 20 nm-
447 AM EDT Thu May 29 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.TODAY...E winds 15 to 20 kt with gusts up to 25 kt, becoming N
10 to 15 kt with gusts up to 20 kt early this afternoon, then
diminishing to 5 to 10 kt late. Seas 2 to 4 ft, occasionally to
5 ft, building to 4 to 6 ft, occasionally to 8 ft. Wave Detail:
SE 3 ft at 4 seconds and SE 1 ft at 9 seconds, becoming SE 6 ft at
8 seconds and E 3 ft at 4 seconds. Rain and patchy fog this
morning with vsby 1 to 3 nm.
.TONIGHT...SW winds 5 to 10 kt. Seas 4 to 5 ft, occasionally to
6 ft. Wave Detail: SE 5 ft at 8 seconds. Chance of showers after
midnight.
.FRI...S winds around 10 kt. Seas 3 to 4 ft, occasionally to
5 ft. Wave Detail: SE 4 ft at 7 seconds. Showers likely.
.FRI NIGHT...S winds around 10 kt. Seas around 3 ft. Wave Detail:
SE 3 ft at 7 seconds. Showers and chance of tstms. Vsby 1 to
3 nm.
.SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft, occasionally to 8 ft. Wave Detail: S 6 ft at 8 seconds.
Chance of tstms. Showers likely. Vsby 1 to 3 nm.
.SAT NIGHT...W winds around 15 kt with gusts up to 20 kt. Seas
4 to 6 ft, occasionally to 8 ft. Wave Detail: S 6 ft at
8 seconds. Chance of showers.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft, occasionally to 5 ft.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft, occasionally
to 5 ft.
.MON...SW winds 5 to 10 kt. Seas 3 to 4 ft, occasionally to 5 ft.
.MON NIGHT...SW winds 5 to 10 kt. Seas around 3 ft.

Winds and seas may be higher in and near tstms.

$$

ANZ355-292130-
Sandy Hook NJ to Fire Island Inlet NY out 20 nm-
447 AM EDT Thu May 29 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.TODAY...NE winds 15 to 20 kt with gusts up to 25 kt, becoming N
10 to 15 kt with gusts up to 20 kt late this morning, then
becoming NW around 5 kt late. Seas 3 to 4 ft, occasionally to 5
ft, building to 4 to 6 ft, occasionally to 8 ft. Wave Detail: SE 4
ft at 5 seconds and SE 1 ft at 9 seconds, becoming SE 5 ft at 8
seconds. Rain likely with patchy fog this morning. Vsby 1 to 3
nm.
.TONIGHT...SW winds 5 to 10 kt. Seas 3 to 5 ft, occasionally to
6 ft. Wave Detail: SE 5 ft at 8 seconds. Chance of showers after
midnight.
.FRI...S winds 5 to 10 kt. Seas 3 to 4 ft, occasionally to 5 ft.
Wave Detail: SE 4 ft at 7 seconds. Showers likely.
.FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds. Showers and chance of tstms. Vsby 1 to 3 nm.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft, occasionally to 6 ft. Wave Detail: S 4 ft at 7 seconds and
W 2 ft at 3 seconds. Showers likely with chance of tstms. Vsby
1 to 3 nm.
.SAT NIGHT...W winds around 15 kt with gusts up to 20 kt. Seas
3 to 5 ft, occasionally to 6 ft. Wave Detail: S 4 ft at 8 seconds
and W 2 ft at 4 seconds. Chance of showers.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft, occasionally to 5 ft.
.SUN NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft.
.MON...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.

Winds and seas may be higher in and near tstms.

$$

ANZ332-292130-
Long Island Sound East of the Mouth of the Connecticut River-
447 AM EDT Thu May 29 2025

.TODAY...E winds 10 to 15 kt with gusts up to 20 kt, becoming N
late. Seas 2 to 3 ft. Wave Detail: E 2 ft at 4 seconds. Rain this
morning. Patchy fog. Vsby 1 to 3 nm.
.TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 8 seconds.
.FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 8 seconds and SW 1 ft at 2 seconds. Chance of showers.
.FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 1 ft at 2 seconds and SE 1 ft at 7 seconds. Showers with chance
of tstms. Patchy fog. Vsby 1 to 3 nm.
.SAT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft, occasionally to 5 ft. Wave Detail: W 3 ft at 3 seconds and
E 1 ft at 7 seconds. Patchy fog in the morning. Showers likely.
Chance of tstms in the morning. Vsby 1 to 3 nm.
.SAT NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft, occasionally to
5 ft. Wave Detail: W 3 ft at 4 seconds and SE 1 ft at 9 seconds.
Chance of showers.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft.
.SUN NIGHT...SW winds 10 to 15 kt. Seas around 2 ft.
.MON...SW winds 5 to 10 kt. Seas around 2 ft.
.MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.

Winds and seas may be higher in and near tstms.

$$

ANZ331-292130-
Long Island Sound East of New Haven CT/Port Jefferson NY to the
Mouth of the Connecticut River-
447 AM EDT Thu May 29 2025

.TODAY...E winds 10 to 15 kt with gusts up to 20 kt, becoming NE
5 to 10 kt early this afternoon, then becoming N late. Seas 1 to 2
ft, then 1 ft or less this afternoon. Wave Detail: E 1 ft at 3
seconds. Rain and patchy fog this morning, with vsby 1 to 3 nm.
.TONIGHT...SW winds around 5 kt. Seas 1 ft or less. Wave Detail:
E 1 ft at 3 seconds.
.FRI...S winds around 5 kt. Seas 1 ft or less. Showers likely,
mainly in the morning with vsby 1 to 3 nm.
.FRI NIGHT...SE winds 5 to 10 kt. Seas 1 ft or less. Patchy fog
in the evening. Showers and chance of tstms. Vsby 1 to 3 nm.
.SAT...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. Showers likely. Chance of
tstms. Vsby 1 to 3 nm.
.SAT NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
W 2 ft at 3 seconds. Showers likely, mainly in the evening.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.SUN NIGHT...W winds 5 to 10 kt. Seas 1 ft or less.
.MON...SW winds 5 to 10 kt. Seas 1 ft or less.
.MON NIGHT...SW winds 5 to 10 kt. Seas 1 ft or less.

Winds and seas may be higher in and near tstms.

$$

ANZ335-292130-
Long Island Sound West of New Haven CT/Port Jefferson NY-
447 AM EDT Thu May 29 2025

.TODAY...NE winds 10 to 15 kt, diminishing to 5 to 10 kt early
this afternoon, then becoming NW late. Seas 1 to 2 ft this
morning, then 1 ft or less. Wave Detail: E 1 ft at 2 seconds.
Rain likely with patchy fog this morning. Vsby 1 to 3 nm.
.TONIGHT...SW winds around 5 kt. Seas 1 ft or less. Wave Detail:
E 1 ft at 3 seconds.
.FRI...S winds around 5 kt. Seas 1 ft or less. Showers likely.
.FRI NIGHT...S winds 5 to 10 kt, becoming E after midnight. Seas
1 ft or less. Showers and chance of tstms. Vsby 1 to 3 nm.
.SAT...NW winds 10 to 15 kt, becoming W with gusts up to 20 kt in
the afternoon. Seas around 2 ft. Wave Detail: NW 1 ft at
2 seconds. Showers and chance of tstms. Vsby 1 to 3 nm.
.SAT NIGHT...W winds 10 to 15 kt. Seas around 2 ft in the
evening, then 1 ft or less. Wave Detail: W 1 ft at 2 seconds,
becoming W 1 ft at 3 seconds. Showers likely, mainly in the
evening.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft.
.SUN NIGHT...W winds 5 to 10 kt. Seas 1 ft or less.
.MON...W winds 5 to 10 kt. Seas 1 ft or less.
.MON NIGHT...SW winds around 5 kt. Seas 1 ft or less.

Winds and seas may be higher in and near tstms.

$$

ANZ338-292130-
New York Harbor-
447 AM EDT Thu May 29 2025

.TODAY...NE winds 10 to 15 kt with gusts up to 20 kt, becoming N
5 to 10 kt this afternoon. Waves 1 to 2 ft. Wave Detail: E 1 ft at
3 seconds. Chance of rain early. Patchy fog this morning with
vsby 1 to 3 nm.
.TONIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft. Chance of showers
after midnight.
.FRI...S winds 5 to 10 kt. Waves 1 to 2 ft. Showers likely.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft in the evening,
then 1 ft or less. Showers and chance of tstms. Vsby 1 to 3 nm.
.SAT...W winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft. Wave Detail: W 1 ft at 2 seconds. Showers likely with chance
of tstms. Vsby 1 to 3 nm.
.SAT NIGHT...W winds 10 to 15 kt. Waves 1 to 2 ft. Wave Detail:
W 1 ft at 2 seconds. Chance of showers.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Waves 1 to
2 ft.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft or less.
.MON...W winds 5 to 10 kt. Waves 1 ft or less.
.MON NIGHT...SW winds around 5 kt. Waves 1 ft or less.

Winds and waves may be higher in and near tstms.

$$

ANZ340-292130-
Peconic and Gardiners Bays-
447 AM EDT Thu May 29 2025

.TODAY...E winds 10 to 15 kt with gusts up to 20 kt, becoming NE
early this afternoon, then becoming N 5 to 10 kt late. Waves 1 to
2 ft. Rain this morning. Patchy fog. Vsby 1 to 3 nm.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft or less.
.FRI...S winds 5 to 10 kt. Waves 1 ft or less. Chance of showers.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft or less. Patchy fog
in the evening. Showers and chance of tstms. Vsby 1 to 3 nm.
.SAT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves 1 to 2
ft. Showers likely with chance of tstms. Vsby 1 to 3 nm.
.SAT NIGHT...W winds 10 to 15 kt. Waves 1 to 2 ft. Chance of
showers.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Waves 1 to
2 ft.
.SUN NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less.
.MON...SW winds 5 to 10 kt. Waves 1 ft or less.
.MON NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less.

Winds and waves may be higher in and near tstms.

$$

ANZ345-292130-
South Shore Bays from Jones Inlet through Shinnecock Bay-
447 AM EDT Thu May 29 2025

.TODAY...E winds 10 to 15 kt with gusts up to 20 kt, becoming N
5 to 10 kt this afternoon. Waves 1 to 2 ft this morning, then 1
ft or less. Rain and patchy fog this morning with vsby 1 to 3 nm.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. Chance of
showers after midnight.
.FRI...S winds 5 to 10 kt. Waves 1 ft or less. Showers likely.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft or less. Patchy fog
in the evening. Showers and chance of tstms. Vsby 1 to 3 nm.
.SAT...W winds 15 to 20 kt with gusts up to 25 kt. Waves around
2 ft. Showers likely with chance of tstms. Vsby 1 to 3 nm.
.SAT NIGHT...W winds 10 to 15 kt. Waves 1 to 2 ft.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Waves 1 to 2
ft.
.SUN NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less.
.MON...SW winds 5 to 10 kt. Waves 1 ft or less.
.MON NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less.

Winds and waves may be higher in and near tstms.

$$


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