FZUS52 KCHS 200530
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
1230 AM EST Sat Dec 20 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
AMZ300-201800-
1230 AM EST Sat Dec 20 2025
.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will prevail over the weekend, with another cold
front forecast to impact the area Monday.
$$
AMZ330-201800-
Charleston Harbor-
1230 AM EST Sat Dec 20 2025
.REST OF TONIGHT...NW winds 5 kt.
.SAT...NE winds 5 to 10 kt.
.SAT NIGHT...NE winds 5 kt, becoming N after midnight.
.SUN...NW winds 5 kt.
.SUN NIGHT...N winds 5 to 10 kt, becoming NE 10 to 15 kt after
midnight.
.MON...NE winds 10 to 15 kt.
.MON NIGHT...NE winds 5 to 10 kt.
.TUE...S winds 5 kt.
.TUE NIGHT...W winds 5 kt.
.WED...N winds 5 kt.
.WED NIGHT...NE winds 5 kt.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 54 degrees.
$$
AMZ350-201800-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1230 AM EST Sat Dec 20 2025
.REST OF TONIGHT...N winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE
4 ft at 9 seconds and SW 2 ft at 5 seconds.
.SAT...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 2 ft at 4 seconds.
.SAT NIGHT...NE winds 5 to 10 kt, becoming N after midnight. Seas
3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and NE 1 foot at
4 seconds.
.SUN...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 1 foot at 5 seconds.
.SUN NIGHT...N winds 15 to 20 kt with gusts to 25 kt. Seas 3 to
4 ft, building to 4 to 6 ft after midnight. Wave Detail: SE 3 ft
at 9 seconds, becoming NE 5 ft at 5 seconds and SE 3 ft at
10 seconds.
.MON...NE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft.
Wave Detail: E 6 ft at 10 seconds and NE 5 ft at 6 seconds.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt, becoming E
5 to 10 kt after midnight. Seas 5 to 6 ft, subsiding to 4 to 6 ft
after midnight.
.TUE...S winds 5 to 10 kt. Seas 4 to 5 ft.
.TUE NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft.
.WED...N winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
$$
AMZ352-201800-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1230 AM EST Sat Dec 20 2025
.REST OF TONIGHT...N winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE
3 ft at 9 seconds and NW 2 ft at 3 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 1 foot at 3 seconds.
.SAT NIGHT...NE winds 5 kt. Seas 3 ft. Wave Detail: SE 3 ft at
9 seconds and NE 1 foot at 3 seconds.
.SUN...NW winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at
9 seconds and NE 1 foot at 5 seconds.
.SUN NIGHT...N winds 10 to 15 kt, becoming NE 15 to 20 kt with
gusts to 25 kt after midnight. Seas 2 to 3 ft, building to 4 to
5 ft after midnight. Wave Detail: SE 3 ft at 8 seconds and NE
1 foot at 5 seconds, becoming NE 4 ft at 5 seconds and SE 3 ft at
10 seconds.
.MON...NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft.
Wave Detail: E 6 ft at 10 seconds and NE 5 ft at 6 seconds.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 4 to 6 ft,
subsiding to 4 to 5 ft after midnight.
.TUE...S winds 5 kt. Seas 4 to 5 ft.
.TUE NIGHT...SW winds 5 kt. Seas 3 to 4 ft.
.WED...NW winds 5 kt. Seas 3 ft.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft.
$$
AMZ354-201800-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1230 AM EST Sat Dec 20 2025
.REST OF TONIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: SE 3 ft at 9 seconds and NW 2 ft at 3 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and N 1 foot at 3 seconds.
.SAT NIGHT...NE winds 5 kt, becoming N after midnight. Seas 3 ft.
Wave Detail: SE 3 ft at 9 seconds and NE 1 foot at 3 seconds.
.SUN...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
9 seconds.
.SUN NIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt with
gusts to 25 kt after midnight. Seas 2 to 3 ft, building to 3 to
4 ft after midnight. Wave Detail: E 3 ft at 9 seconds and NE
1 foot at 5 seconds, becoming NE 4 ft at 5 seconds and E 3 ft at
9 seconds.
.MON...NE winds 20 kt with gusts to 25 kt. Seas 4 to 6 ft,
building to 5 to 6 ft in the afternoon. Wave Detail: NE 5 ft at
6 seconds and E 2 ft at 11 seconds, becoming E 6 ft at 11 seconds
and NE 5 ft at 6 seconds.
.MON NIGHT...NE winds 15 to 20 kt, diminishing to 5 to 10 kt
after midnight. Seas 4 to 6 ft, subsiding to 4 to 5 ft after
midnight.
.TUE...SE winds 5 kt. Seas 4 to 5 ft.
.TUE NIGHT...SW winds 5 kt. Seas 4 to 5 ft.
.WED...N winds 5 kt. Seas 3 to 4 ft.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft.
$$
AMZ374-201800-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1230 AM EST Sat Dec 20 2025
.REST OF TONIGHT...N winds 10 to 15 kt. Seas 4 to 5 ft. Wave
Detail: SE 4 ft at 9 seconds and NW 3 ft at 4 seconds.
.SAT...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft
at 9 seconds and N 2 ft at 4 seconds.
.SAT NIGHT...N winds 5 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at
9 seconds.
.SUN...N winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
9 seconds and NE 1 foot at 5 seconds.
.SUN NIGHT...N winds 10 to 15 kt, becoming NE 20 to 25 kt after
midnight. Seas 3 to 4 ft, building to 4 to 6 ft after midnight.
Wave Detail: E 3 ft at 9 seconds and NE 2 ft at 5 seconds,
becoming NE 6 ft at 5 seconds and E 3 ft at 10 seconds.
.MON...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 5 to 7 ft, building to 6 to 7 ft in the
afternoon. Wave Detail: NE 7 ft at 6 seconds and E 2 ft at
11 seconds, becoming E 7 ft at 8 seconds. A slight chance of rain
in the afternoon.
.MON NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 6 to 7 ft, subsiding to 5 to 7 ft after
midnight. A slight chance of rain in the evening.
.TUE...S winds 5 to 10 kt. Seas 5 to 7 ft.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 4 to 6 ft.
.WED...NW winds 5 to 10 kt. Seas 3 to 4 ft.
.WED NIGHT...NE winds 5 kt. Seas 3 to 4 ft.
$$
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
1230 AM EST Sat Dec 20 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
AMZ300-201800-
1230 AM EST Sat Dec 20 2025
.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will prevail over the weekend, with another cold
front forecast to impact the area Monday.
$$
AMZ330-201800-
Charleston Harbor-
1230 AM EST Sat Dec 20 2025
.REST OF TONIGHT...NW winds 5 kt.
.SAT...NE winds 5 to 10 kt.
.SAT NIGHT...NE winds 5 kt, becoming N after midnight.
.SUN...NW winds 5 kt.
.SUN NIGHT...N winds 5 to 10 kt, becoming NE 10 to 15 kt after
midnight.
.MON...NE winds 10 to 15 kt.
.MON NIGHT...NE winds 5 to 10 kt.
.TUE...S winds 5 kt.
.TUE NIGHT...W winds 5 kt.
.WED...N winds 5 kt.
.WED NIGHT...NE winds 5 kt.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 54 degrees.
$$
AMZ350-201800-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1230 AM EST Sat Dec 20 2025
.REST OF TONIGHT...N winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE
4 ft at 9 seconds and SW 2 ft at 5 seconds.
.SAT...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 2 ft at 4 seconds.
.SAT NIGHT...NE winds 5 to 10 kt, becoming N after midnight. Seas
3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and NE 1 foot at
4 seconds.
.SUN...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 1 foot at 5 seconds.
.SUN NIGHT...N winds 15 to 20 kt with gusts to 25 kt. Seas 3 to
4 ft, building to 4 to 6 ft after midnight. Wave Detail: SE 3 ft
at 9 seconds, becoming NE 5 ft at 5 seconds and SE 3 ft at
10 seconds.
.MON...NE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft.
Wave Detail: E 6 ft at 10 seconds and NE 5 ft at 6 seconds.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt, becoming E
5 to 10 kt after midnight. Seas 5 to 6 ft, subsiding to 4 to 6 ft
after midnight.
.TUE...S winds 5 to 10 kt. Seas 4 to 5 ft.
.TUE NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft.
.WED...N winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
$$
AMZ352-201800-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1230 AM EST Sat Dec 20 2025
.REST OF TONIGHT...N winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE
3 ft at 9 seconds and NW 2 ft at 3 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 1 foot at 3 seconds.
.SAT NIGHT...NE winds 5 kt. Seas 3 ft. Wave Detail: SE 3 ft at
9 seconds and NE 1 foot at 3 seconds.
.SUN...NW winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at
9 seconds and NE 1 foot at 5 seconds.
.SUN NIGHT...N winds 10 to 15 kt, becoming NE 15 to 20 kt with
gusts to 25 kt after midnight. Seas 2 to 3 ft, building to 4 to
5 ft after midnight. Wave Detail: SE 3 ft at 8 seconds and NE
1 foot at 5 seconds, becoming NE 4 ft at 5 seconds and SE 3 ft at
10 seconds.
.MON...NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft.
Wave Detail: E 6 ft at 10 seconds and NE 5 ft at 6 seconds.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 4 to 6 ft,
subsiding to 4 to 5 ft after midnight.
.TUE...S winds 5 kt. Seas 4 to 5 ft.
.TUE NIGHT...SW winds 5 kt. Seas 3 to 4 ft.
.WED...NW winds 5 kt. Seas 3 ft.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft.
$$
AMZ354-201800-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1230 AM EST Sat Dec 20 2025
.REST OF TONIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: SE 3 ft at 9 seconds and NW 2 ft at 3 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and N 1 foot at 3 seconds.
.SAT NIGHT...NE winds 5 kt, becoming N after midnight. Seas 3 ft.
Wave Detail: SE 3 ft at 9 seconds and NE 1 foot at 3 seconds.
.SUN...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
9 seconds.
.SUN NIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt with
gusts to 25 kt after midnight. Seas 2 to 3 ft, building to 3 to
4 ft after midnight. Wave Detail: E 3 ft at 9 seconds and NE
1 foot at 5 seconds, becoming NE 4 ft at 5 seconds and E 3 ft at
9 seconds.
.MON...NE winds 20 kt with gusts to 25 kt. Seas 4 to 6 ft,
building to 5 to 6 ft in the afternoon. Wave Detail: NE 5 ft at
6 seconds and E 2 ft at 11 seconds, becoming E 6 ft at 11 seconds
and NE 5 ft at 6 seconds.
.MON NIGHT...NE winds 15 to 20 kt, diminishing to 5 to 10 kt
after midnight. Seas 4 to 6 ft, subsiding to 4 to 5 ft after
midnight.
.TUE...SE winds 5 kt. Seas 4 to 5 ft.
.TUE NIGHT...SW winds 5 kt. Seas 4 to 5 ft.
.WED...N winds 5 kt. Seas 3 to 4 ft.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft.
$$
AMZ374-201800-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1230 AM EST Sat Dec 20 2025
.REST OF TONIGHT...N winds 10 to 15 kt. Seas 4 to 5 ft. Wave
Detail: SE 4 ft at 9 seconds and NW 3 ft at 4 seconds.
.SAT...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft
at 9 seconds and N 2 ft at 4 seconds.
.SAT NIGHT...N winds 5 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at
9 seconds.
.SUN...N winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
9 seconds and NE 1 foot at 5 seconds.
.SUN NIGHT...N winds 10 to 15 kt, becoming NE 20 to 25 kt after
midnight. Seas 3 to 4 ft, building to 4 to 6 ft after midnight.
Wave Detail: E 3 ft at 9 seconds and NE 2 ft at 5 seconds,
becoming NE 6 ft at 5 seconds and E 3 ft at 10 seconds.
.MON...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 5 to 7 ft, building to 6 to 7 ft in the
afternoon. Wave Detail: NE 7 ft at 6 seconds and E 2 ft at
11 seconds, becoming E 7 ft at 8 seconds. A slight chance of rain
in the afternoon.
.MON NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 6 to 7 ft, subsiding to 5 to 7 ft after
midnight. A slight chance of rain in the evening.
.TUE...S winds 5 to 10 kt. Seas 5 to 7 ft.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 4 to 6 ft.
.WED...NW winds 5 to 10 kt. Seas 3 to 4 ft.
.WED NIGHT...NE winds 5 kt. Seas 3 to 4 ft.
$$