477
FZUS52 KCHS 030545
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
145 AM EDT Thu Jul 3 2025

South Santee River SC to Savannah GA out 20 NM and Savannah GA to
Altamaha Sound GA out 60 NM, including Charleston Harbor and
Grays Reef National Marine Sanctuary

AMZ300-031800-
145 AM EDT Thu Jul 3 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A cold front is forecast to stall in the vicinity of the local
region today, lingering just off the southeastern coastline
through the weekend.

$$

AMZ330-031800-
Charleston Harbor-
145 AM EDT Thu Jul 3 2025

.REST OF TONIGHT...SW winds 5 to 10 kt. A chance of tstms. A
chance of showers.
.THU...SW winds 5 kt, becoming S 10 to 15 kt in the afternoon. A
chance of tstms. A chance of showers in the morning, then showers
likely in the afternoon.
.THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. A
chance of showers and tstms.
.FRI...NE winds 10 to 15 kt. A chance of showers. A slight chance
of tstms in the morning, then a chance of tstms in the afternoon.
.FRI NIGHT...E winds 10 to 15 kt. A chance of showers. A chance
of tstms, mainly in the evening.
.SAT...E winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
A chance of showers and tstms.
.SAT NIGHT...E winds 15 to 20 kt with gusts to 25 kt, becoming NE
10 to 15 kt after midnight. Waves 1 to 2 ft. A chance of showers
and tstms.
.SUN...E winds 10 to 15 kt. Showers likely with a chance of
tstms.
.SUN NIGHT...S winds 10 to 15 kt. A chance of showers and tstms.
.MON...SW winds 10 to 15 kt. A chance of showers and tstms.
.MON NIGHT...SW winds 10 to 15 kt. A slight chance of showers and
tstms.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 85 degrees.

$$

AMZ350-031800-
Waters from South Santee River to Edisto Beach SC out 20 NM-
145 AM EDT Thu Jul 3 2025

.REST OF TONIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: S 4 ft at 6 seconds and SE 1 foot at 9 seconds. A chance
of tstms. A chance of showers.
.THU...SW winds 5 to 10 kt. Seas 3 ft. Wave Detail: S 3 ft at
7 seconds. Showers and tstms likely, mainly in the morning.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds. A chance of showers and tstms.
.FRI...NE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds. A chance of showers. A slight chance of tstms in
the morning, then a chance of tstms in the afternoon.
.FRI NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft. Wave Detail: SE 4 ft at 6 seconds. A chance of showers and
tstms.
.SAT...E winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft.
Wave Detail: E 5 ft at 7 seconds. Showers likely with a chance of
tstms.
.SAT NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 4 to
5 ft. A chance of tstms. A chance of showers in the evening, then
showers likely after midnight.
.SUN...E winds 10 to 15 kt. Seas 4 to 5 ft. Showers likely with a
chance of tstms.
.SUN NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A chance of
showers and tstms.
.MON...SW winds 10 kt. Seas 3 to 4 ft. A chance of showers and
tstms.
.MON NIGHT...SW winds 10 kt. Seas 3 to 4 ft. A chance of showers
with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-031800-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
145 AM EDT Thu Jul 3 2025

.REST OF TONIGHT...SW winds 5 to 10 kt. Seas 3 ft. Wave Detail:
SE 3 ft at 7 seconds. A chance of tstms. A chance of showers.
.THU...SW winds 5 to 10 kt, becoming S in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. A chance of showers
and tstms.
.THU NIGHT...S winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 7 seconds. A chance of showers and tstms.
.FRI...NE winds 5 to 10 kt, becoming E 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 3 seconds and
SE 3 ft at 7 seconds. A chance of showers. A slight chance of
tstms in the morning, then a chance of tstms in the afternoon.
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 ft. Wave Detail: E 3 ft
at 5 seconds. A chance of showers. A chance of tstms, mainly in
the evening.
.SAT...E winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft,
building to 4 to 5 ft in the afternoon. Wave Detail: E 4 ft at
6 seconds, becoming E 5 ft at 6 seconds. Showers likely with a
chance of tstms.
.SAT NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 4 to 5 ft. A chance of tstms. A chance of
showers in the evening, then showers likely after midnight.
.SUN...E winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely with a
chance of tstms.
.SUN NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. A chance of
showers and tstms.
.MON...SW winds 5 to 10 kt. Seas 3 ft. A chance of showers and
tstms.
.MON NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A chance of showers
with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-031800-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
145 AM EDT Thu Jul 3 2025

.REST OF TONIGHT...SW winds 10 kt. Seas 2 to 3 ft. Wave Detail:
SE 3 ft at 7 seconds. A chance of tstms. A chance of showers.
.THU...SW winds 5 to 10 kt, becoming S in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. A chance of showers
and tstms.
.THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 8 seconds. A chance of showers and tstms.
.FRI...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds. A chance of showers. A slight chance of tstms in
the morning, then a chance of tstms in the afternoon.
.FRI NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 6 seconds. A chance of showers. A chance of tstms, mainly
in the evening.
.SAT...NE winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: NE 4 ft
at 5 seconds. Showers likely. A slight chance of tstms in the
morning, then a chance of tstms in the afternoon.
.SAT NIGHT...NE winds 15 to 20 kt, becoming E 10 to 15 kt after
midnight. Seas 3 to 4 ft. A chance of tstms. Showers likely,
mainly in the evening.
.SUN...E winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely with a
chance of tstms.
.SUN NIGHT...S winds 10 kt. Seas 3 to 4 ft. A chance of showers
and tstms.
.MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A chance of showers
with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-031800-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
145 AM EDT Thu Jul 3 2025

.REST OF TONIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: S 3 ft at 8 seconds and E 2 ft at 8 seconds. A chance of
tstms. A chance of showers.
.THU...SW winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
8 seconds. Showers and tstms likely, mainly in the morning.
.THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds. A chance of showers and tstms.
.FRI...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds. A chance of showers. A slight chance of tstms in
the morning, then a chance of tstms in the afternoon.
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 ft. Wave Detail: E 3 ft
at 8 seconds. A chance of showers. A chance of tstms, mainly in
the evening.
.SAT...E winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft,
building to 4 to 5 ft in the afternoon. Wave Detail: E 4 ft at
7 seconds, becoming NE 5 ft at 6 seconds. Showers likely. A
slight chance of tstms in the morning, then a chance of tstms in
the afternoon.
.SAT NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Seas 4 to
5 ft. Showers likely with a chance of tstms.
.SUN...E winds 10 to 15 kt. Seas 4 ft. Showers likely with a
chance of tstms.
.SUN NIGHT...S winds 10 kt. Seas 3 to 4 ft. A chance of showers
and tstms.
.MON...SW winds 5 to 10 kt. Seas 3 ft. A chance of showers with a
slight chance of tstms.
.MON NIGHT...SW winds 10 kt. Seas 3 ft. A chance of showers with
a slight chance of tstms.

Winds and seas higher in and near tstms.

$$