428
FZUS52 KCHS 200939
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
539 AM EDT Sun Sep 20 2026

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

AMZ300-202300-
539 AM EDT Sun Sep 20 2026

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A cold front will push through the area mid-week. High pressure
will prevail thereafter.

$$

AMZ340-202300-
Charleston Harbor-
539 AM EDT Sun Sep 20 2026

.TODAY...NE winds 5 to 10 kt, becoming E late. A chance of
showers this morning. A chance of tstms. Showers likely this
afternoon.
.TONIGHT...E winds 5 kt. A slight chance of showers and tstms in
the evening.
.MON...NE winds 5 kt, becoming E in the afternoon. A slight
chance of showers in the morning.
.MON NIGHT...E winds 5 kt. A slight chance of tstms. A slight
chance of showers in the evening, then a chance of showers after
midnight.
.TUE...NE winds 5 to 10 kt. A chance of showers and tstms.
.TUE NIGHT...E winds 5 kt. A chance of showers and tstms.
.WED...NE winds 10 to 15 kt. A chance of showers and tstms.
.WED NIGHT...NE winds 10 to 15 kt. A chance of showers and tstms.
.THU...N winds 10 to 15 kt. A slight chance of showers and tstms.
.THU NIGHT...N winds 10 kt.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 84 degrees.

$$

AMZ360-202300-
Coastal waters from South Santee River to Edisto Beach SC out
20 NM-
539 AM EDT Sun Sep 20 2026

.TODAY...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
9 seconds. A chance of tstms. A chance of showers until late
afternoon, then a slight chance of showers late.
.TONIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas
2 ft. Wave Detail: E 2 ft at 8 seconds.
.MON...NE winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A slight chance of showers in the morning.
.MON NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A chance of showers with a slight chance of tstms
after midnight.
.TUE...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A chance of showers. A chance of tstms, mainly in the
morning.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 7 seconds. A chance of tstms. A chance of showers in the
evening, then showers likely after midnight.
.WED...NE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.WED NIGHT...NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of
showers and tstms.
.THU...N winds 20 to 25 kt. Seas 4 to 5 ft. A slight chance of
showers and tstms.
.THU NIGHT...N winds 15 to 20 kt. Seas 4 to 5 ft. A slight chance
of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ362-202300-
Coastal waters from Edisto Beach SC to Savannah GA out 20 NM-
539 AM EDT Sun Sep 20 2026

.TODAY...NE winds 5 to 10 kt, becoming E late. Seas 2 ft. Wave
Detail: E 2 ft at 8 seconds. A chance of showers and tstms until
late afternoon, then a slight chance of showers and tstms late.
.TONIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
9 seconds.
.MON...NE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A slight chance of showers. A slight chance of tstms
in the afternoon.
.MON NIGHT...SE winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A chance of showers with a slight chance of tstms
after midnight.
.TUE...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A chance of showers. A chance of tstms, mainly in the
morning.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 7 seconds. A chance of tstms. A chance of showers in the
evening, then showers likely after midnight.
.WED...NE winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with
a chance of tstms.
.WED NIGHT...NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of
showers and tstms.
.THU...N winds 15 to 20 kt. Seas 4 to 5 ft. A slight chance of
showers and tstms.
.THU NIGHT...NE winds 15 to 20 kt. Seas 4 to 5 ft. A slight
chance of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ364-202300-
Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm,
including Grays Reef National Marine Sanctuary-
539 AM EDT Sun Sep 20 2026

.TODAY...N winds 5 kt, becoming E late. Seas 2 ft. Wave Detail: E
2 ft at 8 seconds. A chance of showers and tstms until late
afternoon, then a slight chance of showers and tstms late.
.TONIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds.
.MON...NE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A slight chance of showers and tstms.
.MON NIGHT...SE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A slight chance of tstms. A slight chance of showers
in the evening, then a chance of showers after midnight.
.TUE...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A chance of showers. A chance of tstms, mainly in the
morning.
.TUE NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A chance of tstms. A chance of showers in the evening,
then showers likely after midnight.
.WED...NE winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with
a chance of tstms.
.WED NIGHT...NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of
showers and tstms.
.THU...NE winds 20 to 25 kt. Seas 4 to 5 ft. A slight chance of
showers and tstms.
.THU NIGHT...NE winds 20 to 25 kt. Seas 4 to 5 ft. A slight
chance of showers.

Winds and seas higher in and near tstms.

$$

AMZ380-202300-
Waters from South Santee River SC to Edisto Beach SC extending
from 20 to 60 NM-
539 AM EDT Sun Sep 20 2026

.TODAY...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
9 seconds. A chance of showers. A chance of tstms until late
afternoon, then a slight chance of tstms late.
.TONIGHT...SE winds 5 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at
8 seconds. A slight chance of showers. A slight chance of tstms
after midnight.
.MON...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
8 seconds. A slight chance of showers and tstms.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds. A slight chance of showers and tstms in the
evening, then a chance of showers and tstms after midnight.
.TUE...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A chance of showers. A chance of tstms, mainly in the
morning.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 7 seconds. A chance of tstms. A chance of showers in the
evening, then showers likely after midnight.
.WED...NE winds 15 to 20 kt. Seas 3 to 4 ft. Showers likely with
a chance of tstms.
.WED NIGHT...NE winds 15 to 20 kt. Seas 4 to 5 ft. Showers likely
with a chance of tstms.
.THU...N winds 20 to 25 kt. Seas 5 to 6 ft. A chance of showers
and tstms.
.THU NIGHT...N winds 20 kt. Seas 5 to 6 ft. A chance of showers
with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ382-202300-
Waters from Edisto Beach SC to Savannah GA extending from 20 to
60 NM-
539 AM EDT Sun Sep 20 2026

.TODAY...N winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
9 seconds. A chance of tstms this morning. A chance of showers. A
slight chance of tstms this afternoon.
.TONIGHT...SE winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
9 seconds. A slight chance of showers and tstms after midnight.
.MON...E winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
8 seconds. A slight chance of showers in the morning.
.MON NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds. A slight chance of showers and tstms in the
evening, then a chance of showers and tstms after midnight.
.TUE...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A chance of showers. A chance of tstms, mainly in the
morning.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 7 seconds. A chance of tstms. A chance of showers in the
evening, then showers likely after midnight.
.WED...NE winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely with
a chance of tstms.
.WED NIGHT...NE winds 15 to 20 kt. Seas 4 to 5 ft. Showers likely
with a chance of tstms.
.THU...N winds 20 to 25 kt. Seas 4 to 6 ft. A chance of showers
and tstms.
.THU NIGHT...NE winds 20 to 25 kt. Seas 5 to 6 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ384-202300-
Waters from Savannah GA to Altamaha Sound GA extending from 20 to
60 NM-
539 AM EDT Sun Sep 20 2026

.TODAY...N winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A chance of showers and tstms this morning, then a
chance of showers with a slight chance of tstms early this
afternoon.
.TONIGHT...SE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A slight chance of showers and tstms after midnight.
.MON...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
8 seconds. A slight chance of showers and tstms.
.MON NIGHT...SE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds. A slight chance of showers in the evening, then a
chance of showers and tstms after midnight.
.TUE...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A chance of showers. A chance of tstms, mainly in the
morning.
.TUE NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
7 seconds. A chance of tstms. A chance of showers in the evening,
then showers likely after midnight.
.WED...NE winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with
a chance of tstms.
.WED NIGHT...NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of
showers and tstms.
.THU...NE winds 20 to 25 kt. Seas 4 to 6 ft. A chance of showers
and tstms.
.THU NIGHT...NE winds 20 to 25 kt. Seas 5 to 6 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$