779
FZUS52 KCHS 031333
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
933 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

AMZ300-040230-
933 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.

$$

AMZ330-040230-
Charleston Harbor-
933 AM EDT Thu Jul 3 2025

.REST OF TODAY...S winds 10 kt. A chance of showers and tstms
late this morning, then showers and tstms likely early this
afternoon. A chance of showers and tstms late.
.TONIGHT...Variable winds 5 kt. A chance of showers and tstms,
mainly in the evening.
.FRI...NE winds 5 to 10 kt, becoming E 10 to 15 kt with gusts to
20 kt in the afternoon. 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 and tstms.
.SAT...E winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Waves 1 to 2 ft. Showers likely with a chance of tstms
in the morning, then showers and tstms likely in the afternoon.
.SAT NIGHT...E winds 10 to 15 kt. A chance of tstms. Showers
likely, mainly in the evening.
.SUN...E winds 10 to 15 kt. Showers likely with a chance of
tstms.
.SUN NIGHT...S winds 5 to 10 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 chance of showers with a
slight chance of tstms.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 85 degrees.

$$

AMZ350-040230-
Waters from South Santee River to Edisto Beach SC out 20 NM-
933 AM EDT Thu Jul 3 2025

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

Winds and seas higher in and near tstms.

$$

AMZ352-040230-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
933 AM EDT Thu Jul 3 2025

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

Winds and seas higher in and near tstms.

$$

AMZ354-040230-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
933 AM EDT Thu Jul 3 2025

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

$$

AMZ374-040230-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
933 AM EDT Thu Jul 3 2025

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

$$