236
FZUS52 KCHS 201819
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
219 PM 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

AMZ300-210800-
219 PM 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.

$$

AMZ340-210800-
Charleston Harbor-
219 PM EDT Sun Sep 20 2026

.THIS AFTERNOON...E winds 10 kt. A chance of showers and tstms.
.TONIGHT...E winds 5 to 10 kt, diminishing to 5 kt after
midnight.
.MON...NE winds 5 kt, becoming E in the afternoon.
.MON NIGHT...E winds 5 kt. A chance of showers with a slight
chance of tstms after midnight.
.TUE...N winds 5 kt, becoming E in the afternoon. A chance of
showers. A slight chance of tstms in the morning, then a chance
of tstms in the afternoon.
.TUE NIGHT...E winds 5 to 10 kt, becoming NE after midnight. A
chance of showers. A chance of tstms, mainly in the evening.
.WED...NE winds 10 to 15 kt. Showers likely with a chance of
tstms.
.WED NIGHT...NE winds 10 to 15 kt. A slight chance of showers and
tstms.
.THU...N winds 15 kt. A chance of showers and tstms.
.THU NIGHT...N 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 84 degrees.

$$

AMZ360-210800-
Coastal waters from South Santee River to Edisto Beach SC out
20 NM-
219 PM EDT Sun Sep 20 2026

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

Winds and seas higher in and near tstms.

$$

AMZ362-210800-
Coastal waters from Edisto Beach SC to Savannah GA out 20 NM-
219 PM EDT Sun Sep 20 2026

.THIS AFTERNOON...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: NE
2 ft at 8 seconds. A chance of showers and tstms.
.TONIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas
2 ft. Wave Detail: E 2 ft at 8 seconds. A slight chance of
showers and tstms in the evening.
.MON...NE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A slight chance of showers and tstms in the morning.
.MON NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A chance of showers and tstms after midnight.
.TUE...N winds 5 to 10 kt, becoming E in the afternoon. Seas
2 ft. Wave Detail: E 2 ft at 8 seconds. A chance of showers with
a slight chance of tstms.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 7 seconds. A chance of showers. A slight chance of tstms in
the evening, then a chance of tstms 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 chance of showers
and tstms.
.THU NIGHT...N winds 20 to 25 kt. Seas 4 to 6 ft. A slight chance
of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ364-210800-
Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm,
including Grays Reef National Marine Sanctuary-
219 PM EDT Sun Sep 20 2026

.THIS AFTERNOON...NE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 8 seconds. A chance of showers and tstms.
.TONIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A slight chance of showers and tstms.
.MON...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A slight chance of tstms. A chance of showers, mainly
in the morning.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 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 with a slight chance of tstms.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 8 seconds. A chance of showers with a slight chance of tstms.
.WED...NE winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with
a chance of tstms.
.WED NIGHT...NE winds 20 to 25 kt. Seas 4 to 5 ft. A chance of
showers and tstms.
.THU...N winds 20 to 25 kt. Seas 4 to 5 ft. A chance of showers
and tstms.
.THU NIGHT...N winds 25 to 30 kt. Seas 5 to 7 ft. A slight chance
of showers.

Winds and seas higher in and near tstms.

$$

AMZ380-210800-
Waters from South Santee River SC to Edisto Beach SC extending
from 20 to 60 NM-
219 PM EDT Sun Sep 20 2026

.THIS AFTERNOON...E winds 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds. A chance of showers and tstms.
.TONIGHT...SE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
8 seconds. A slight chance of showers and tstms in the evening.
.MON...NE winds 5 kt, increasing to 5 to 10 kt in the afternoon.
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 and tstms.
.TUE NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 8 seconds. A slight 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 20 to 25 kt. Seas 4 to 6 ft. Showers likely
with a chance of tstms.
.THU...N winds 25 to 30 kt. Seas 7 to 9 ft. A chance of showers
and tstms.
.THU NIGHT...N winds 25 to 30 kt. Seas 7 to 9 ft. A chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ382-210800-
Waters from Edisto Beach SC to Savannah GA extending from 20 to
60 NM-
219 PM EDT Sun Sep 20 2026

.THIS AFTERNOON...NE winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft
at 9 seconds. A chance of showers and tstms.
.TONIGHT...SE winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A slight chance of showers and tstms.
.MON...NE 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
morning.
.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 and SE 1 foot at 3 seconds. A chance of showers with a
slight chance of tstms.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 8 seconds. A slight 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 20 to 25 kt. Seas 4 to 6 ft. Showers likely
with a chance of tstms.
.THU...N winds 25 to 30 kt. Seas 6 to 8 ft. A chance of showers
and tstms.
.THU NIGHT...N winds 25 to 30 kt. Seas 7 to 9 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ384-210800-
Waters from Savannah GA to Altamaha Sound GA extending from 20 to
60 NM-
219 PM EDT Sun Sep 20 2026

.THIS AFTERNOON...NE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 8 seconds. A chance of showers and tstms.
.TONIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A slight chance of showers and tstms after midnight.
.MON...E winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at
8 seconds. A slight chance of showers and tstms in the morning.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds. 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 with a slight chance of tstms.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 8 seconds. A chance of showers with a slight chance of tstms
in the evening, then showers likely with a chance of tstms 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 4 to 5 ft. Showers likely
with a chance of tstms.
.THU...N winds 25 to 30 kt. Seas 5 to 7 ft. A chance of showers
and tstms.
.THU NIGHT...N winds 25 to 30 kt. Seas 7 to 9 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$