Charleston, SC Coastal Forecast

FZUS52 KCHS 230553
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
1253 AM EST Tue Dec 23 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

AMZ300-231815-
1253 AM EST Tue Dec 23 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will prevail through the holiday week. A cold front
could move through the area Sunday night or early Monday.

$$

AMZ330-231815-
Charleston Harbor-
1253 AM EST Tue Dec 23 2025

.REST OF TONIGHT...NE winds 5 to 10 kt, diminishing to 5 kt late.
.TUE...S winds 5 kt, becoming SW in the afternoon.
.TUE NIGHT...W winds 5 to 10 kt.
.WED...NW winds 5 kt, becoming N in the afternoon.
.WED NIGHT...E winds 5 kt.
.THU...SW winds 5 to 10 kt.
.THU NIGHT...W winds 5 kt.
.FRI...W winds 5 to 10 kt.
.FRI NIGHT...SW winds 10 kt.
.SAT...SW winds 10 kt.
.SAT NIGHT...SW winds 5 kt.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 54 degrees.

$$

AMZ350-231815-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1253 AM EST Tue Dec 23 2025

.REST OF TONIGHT...NE winds 15 to 20 kt, becoming E 10 kt late.
Seas 4 to 5 ft. Wave Detail: E 5 ft at 9 seconds.
.TUE...S winds 5 to 10 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the
afternoon. Wave Detail: E 5 ft at 9 seconds, becoming E 4 ft at
9 seconds.
.TUE NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft.
Wave Detail: E 3 ft at 9 seconds and W 2 ft at 4 seconds.
.WED...NW winds 5 to 10 kt, becoming N in the afternoon. Seas
2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and E 2 ft at
9 seconds.
.WED NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 9 seconds and SW 1 foot at 3 seconds.
.THU...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at
9 seconds and SW 1 foot at 3 seconds.
.THU NIGHT...W winds 10 kt. Seas 2 to 3 ft.
.FRI...W winds 10 to 15 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT NIGHT...SW winds 10 kt. Seas 2 to 3 ft.

$$

AMZ352-231815-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1253 AM EST Tue Dec 23 2025

.REST OF TONIGHT...NE winds 15 to 20 kt, diminishing to 10 kt
late. Seas 4 to 5 ft. Wave Detail: E 5 ft at 8 seconds.
.TUE...S winds 5 to 10 kt, becoming SW in the afternoon. Seas
4 to 5 ft, subsiding to 3 to 4 ft in the afternoon. Wave Detail:
E 5 ft at 9 seconds, becoming E 4 ft at 9 seconds.
.TUE NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...W winds 5 to 10 kt, becoming N in the afternoon. Seas 2 to
3 ft. Wave Detail: E 3 ft at 9 seconds and W 1 foot at 2 seconds.
.WED NIGHT...SE winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
9 seconds.
.THU...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at
9 seconds and SW 1 foot at 2 seconds.
.THU NIGHT...W winds 10 kt. Seas 2 to 3 ft.
.FRI...W winds 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.SAT...SW winds 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.

$$

AMZ354-231815-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1253 AM EST Tue Dec 23 2025

.REST OF TONIGHT...NE winds 15 to 20 kt, diminishing to 10 kt
late. Seas 4 to 5 ft. Wave Detail: E 5 ft at 8 seconds. A slight
chance of showers.
.TUE...SE winds 5 to 10 kt, becoming SW in the afternoon. Seas
4 to 5 ft. Wave Detail: E 5 ft at 8 seconds.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...W winds 10 kt, becoming N in the afternoon. Seas 2 to
3 ft. Wave Detail: E 3 ft at 9 seconds.
.WED NIGHT...E winds 5 kt, becoming S after midnight. Seas 2 to
3 ft. Wave Detail: E 3 ft at 9 seconds.
.THU...W winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
9 seconds.
.THU NIGHT...W winds 5 to 10 kt. Seas 2 ft.
.FRI...SW winds 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.SAT...SW winds 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 2 ft.

$$

AMZ374-231815-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1253 AM EST Tue Dec 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

.REST OF TONIGHT...E winds 15 to 20 kt, diminishing to 10 kt
late. Seas 6 to 7 ft. Wave Detail: E 7 ft at 8 seconds. A slight
chance of showers.
.TUE...S winds 5 to 10 kt, becoming SW in the afternoon. Seas
5 to 6 ft, subsiding to 4 to 5 ft in the afternoon. Wave Detail:
E 6 ft at 9 seconds, becoming E 5 ft at 9 seconds. A slight
chance of showers in the morning.
.TUE NIGHT...W winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E
5 ft at 9 seconds.
.WED...W winds 10 to 15 kt, becoming NW 5 to 10 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds.
.WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds.
.THU...W winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
9 seconds.
.THU NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft, building to
3 to 4 ft after midnight.
.FRI...W winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT...W winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.

$$