459
FZUS52 KCHS 140212
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
1011 PM EDT Wed Aug 13 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

AMZ300-141500-
1011 PM EDT Wed Aug 13 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will prevail across the region through Friday. A
weak cold front will move through Saturday, followed by high
pressure into the middle of next week.

$$

AMZ330-141500-
Charleston Harbor-
1011 PM EDT Wed Aug 13 2025

.OVERNIGHT...SW winds 5 to 10 kt. A slight chance of showers and
tstms late.
.THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts to
20 kt in the afternoon. A slight chance of showers and tstms in
the morning, then a chance of showers and tstms in the afternoon.
.THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Showers and tstms likely, mainly in the evening.
.FRI...W winds 5 kt, becoming SW in the afternoon. A chance of
showers and tstms in the afternoon.
.FRI NIGHT...SW winds 5 to 10 kt, becoming W after midnight. A
chance of showers and tstms.
.SAT...NE winds 5 to 10 kt. A chance of showers and tstms.
.SAT NIGHT...E winds 5 to 10 kt. A chance of showers and tstms.
.SUN...NE winds 10 to 15 kt. A chance of showers and tstms.
.SUN NIGHT...E winds 5 to 10 kt.
.MON...NE winds 10 to 15 kt.
.MON NIGHT...E winds 5 to 10 kt.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 84 degrees.

$$

AMZ350-141500-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1011 PM EDT Wed Aug 13 2025

.OVERNIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: S 2 ft
at 4 seconds and E 2 ft at 7 seconds. A slight chance of showers
and tstms late.
.THU...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 5 seconds and E 2 ft at 8 seconds. A slight chance of showers
and tstms in the morning, then a chance of showers and tstms in
the afternoon.
.THU NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to
3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 9 seconds.
Showers and tstms likely.
.FRI...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at
9 seconds. A chance of showers and tstms.
.FRI NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas
2 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 8 seconds.
A chance of showers and tstms.
.SAT...N winds 5 to 10 kt, becoming NE in the afternoon. Seas
2 ft. Wave Detail: NE 2 ft at 7 seconds and S 1 foot at
5 seconds. A chance of showers and tstms.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 ft. A chance of showers
and tstms.
.SUN...NE winds 10 kt. Seas 2 ft. A chance of showers and tstms.
.SUN NIGHT...E winds 5 to 10 kt. Seas 2 ft.
.MON...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.MON NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance
of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-141500-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1011 PM EDT Wed Aug 13 2025

.OVERNIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 4 seconds and E 2 ft at 9 seconds. A slight chance of
showers and tstms.
.THU...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft
at 5 seconds and E 2 ft at 8 seconds. A slight chance of showers
and tstms in the morning, then a chance of showers and tstms in
the afternoon.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 4 seconds and E 1 foot at 8 seconds. A chance of showers
and tstms.
.FRI...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 9 seconds.
A slight chance of showers and tstms in the morning, then a
chance of showers and tstms in the afternoon.
.FRI NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas
2 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 9 seconds.
A chance of showers and tstms.
.SAT...N winds 5 kt, becoming E in the afternoon. Seas 2 ft. Wave
Detail: S 1 foot at 4 seconds and SE 1 foot at 8 seconds. A
chance of showers and tstms.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 ft. A chance of showers
and tstms.
.SUN...NE winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.SUN NIGHT...E winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.
.MON...NE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
and tstms.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-141500-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1011 PM EDT Wed Aug 13 2025

.OVERNIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 4 seconds and E 2 ft at 8 seconds. A slight chance of
showers and tstms.
.THU...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and E 2 ft at 8 seconds. A slight chance of showers
in the morning, then a chance of showers and tstms in the
afternoon.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 4 seconds and E 1 foot at 9 seconds. A chance of showers
and tstms.
.FRI...W winds 5 to 10 kt, becoming S in the afternoon. Seas
2 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 9 seconds.
A slight chance of showers and tstms in the morning, then a
chance of showers and tstms in the afternoon.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 9 seconds and S 1 foot at 5 seconds. A chance of showers and
tstms.
.SAT...N winds 5 kt, becoming NE in the afternoon. Seas 2 ft.
Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 3 seconds. A
chance of showers and tstms in the morning, then showers and
tstms likely in the afternoon.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 ft. Showers and tstms
likely, mainly in the evening.
.SUN...NE winds 10 kt. Seas 2 ft. A chance of showers and tstms.
.SUN NIGHT...E winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.
.MON...NE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
and tstms.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-141500-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1011 PM EDT Wed Aug 13 2025

.OVERNIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: E 3 ft
at 9 seconds and S 2 ft at 3 seconds. A slight chance of showers
and tstms late this evening, then a chance of showers and tstms.
.THU...SW winds 10 kt. Seas 3 ft. Wave Detail: SW 2 ft at
4 seconds and E 2 ft at 9 seconds. A slight chance of showers and
tstms.
.THU NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft.
Wave Detail: S 2 ft at 4 seconds and E 2 ft at 9 seconds. A
chance of showers and tstms.
.FRI...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at
5 seconds and E 2 ft at 9 seconds. A chance of showers and tstms.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 9 seconds. A chance of showers and tstms.
.SAT...NW winds 5 kt, becoming NE in the afternoon. Seas 2 ft.
Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 4 seconds.
Showers and tstms likely.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 ft. A chance of showers
and tstms in the evening, then showers and tstms likely after
midnight.
.SUN...NE winds 10 kt. Seas 2 ft. A chance of showers and tstms.
.SUN NIGHT...NE winds 5 to 10 kt. Seas 2 ft. A chance of showers
and tstms.
.MON...NE winds 10 kt. Seas 2 to 3 ft. A chance of showers and
tstms.
.MON NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance
of showers and tstms.

Winds and seas higher in and near tstms.

$$