FZUS52 KCHS 211720
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
1219 PM EST Sun Dec 21 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
AMZ300-220600-
1219 PM EST Sun Dec 21 2025
.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure continues to prevail today, with a cold front then
expected to dive across the region tonight into Monday. High
pressure then returns Tuesday, resulting in above normal
temperatures and dry conditions for the remainder of the holiday
week.
$$
AMZ330-220600-
Charleston Harbor-
1219 PM EST Sun Dec 21 2025
.THIS AFTERNOON...NW winds 5 kt, becoming NE late.
.TONIGHT...N winds 5 to 10 kt, becoming NE 15 to 20 kt after
midnight. Waves 1 to 2 ft.
.MON...NE winds 10 to 15 kt with gusts to 20 kt.
.MON NIGHT...NE winds 5 to 10 kt.
.TUE...SW winds 5 to 10 kt.
.TUE NIGHT...W winds 5 kt.
.WED...N winds 5 kt.
.WED NIGHT...E winds 5 kt.
.THU...W winds 5 to 10 kt.
.THU NIGHT...SW winds 5 to 10 kt.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 55 degrees.
$$
AMZ350-220600-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1219 PM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM EST THIS EVENING
THROUGH MONDAY EVENING...
.THIS AFTERNOON...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 8 seconds and NE 1 foot at 4 seconds.
.TONIGHT...NE winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. Seas 3 to 4 ft, building to 4 to 6 ft after midnight.
Wave Detail: NE 3 ft at 4 seconds and SE 2 ft at 10 seconds,
becoming NE 5 ft at 6 seconds and E 2 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. Wave Detail: E 6 ft at 8 seconds.
.MON NIGHT...NE winds 10 to 15 kt, becoming E 5 to 10 kt after
midnight. Seas 4 to 6 ft, subsiding to 4 to 5 ft after midnight.
Wave Detail: E 6 ft at 8 seconds, becoming E 5 ft at 9 seconds.
.TUE...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 9 seconds.
.TUE NIGHT...W winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 9 seconds and SW 2 ft at 4 seconds.
.WED...N winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...E winds 5 kt. Seas 2 ft.
.THU...W winds 5 to 10 kt. Seas 2 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
$$
AMZ352-220600-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1219 PM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EST TONIGHT
THROUGH MONDAY EVENING...
.THIS AFTERNOON...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 9 seconds and NE 1 foot at 5 seconds.
.TONIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas 2 to
3 ft, building to 4 to 5 ft after midnight. Wave Detail: NE 2 ft
at 5 seconds and SE 2 ft at 8 seconds, becoming NE 5 ft at
5 seconds and SE 2 ft at 10 seconds.
.MON...NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft,
building to 5 to 6 ft in the afternoon. Wave Detail: E 6 ft at
7 seconds and E 2 ft at 10 seconds, becoming E 6 ft at 8 seconds.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt, becoming E
5 to 10 kt after midnight. Seas 4 to 6 ft, subsiding to 4 to 5 ft
after midnight. Wave Detail: E 5 ft at 8 seconds, becoming E 5 ft
at 9 seconds.
.TUE...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at
9 seconds.
.TUE NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft.
.THU...W winds 5 to 10 kt. Seas 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
$$
AMZ354-220600-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1219 PM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EST TONIGHT
THROUGH MONDAY EVENING...
.THIS AFTERNOON...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 9 seconds and NE 1 foot at 4 seconds.
.TONIGHT...NE winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. Seas 2 to 3 ft, building to 4 to 5 ft after midnight.
Wave Detail: NE 2 ft at 5 seconds and E 2 ft at 9 seconds,
becoming NE 5 ft at 5 seconds and E 2 ft at 9 seconds.
.MON...NE winds 20 to 25 kt. Seas 4 to 6 ft, building to 5 to
6 ft in the afternoon. Wave Detail: NE 6 ft at 6 seconds and E
2 ft at 11 seconds, becoming E 6 ft at 7 seconds and E 1 foot at
11 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. Wave Detail: E 5 ft at
8 seconds.
.TUE...SE winds 5 kt, becoming SW in the afternoon. Seas 4 to
5 ft. Wave Detail: E 5 ft at 9 seconds.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...SE winds 5 kt. Seas 2 to 3 ft.
.THU...W winds 5 to 10 kt. Seas 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 ft.
$$
AMZ374-220600-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1219 PM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM EST THIS EVENING
THROUGH TUESDAY AFTERNOON...
.THIS AFTERNOON...N winds 5 to 10 kt. Seas 3 ft. Wave Detail: E
3 ft at 9 seconds and NE 1 foot at 5 seconds.
.TONIGHT...NE winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. Seas 4 to 5 ft, building to 5 to 7 ft after midnight.
Wave Detail: NE 4 ft at 5 seconds and E 3 ft at 9 seconds,
becoming NE 6 ft at 6 seconds and E 3 ft at 10 seconds.
.MON...NE winds 20 to 25 kt. Seas 6 to 7 ft, building to 6 to
8 ft in the afternoon. Wave Detail: NE 7 ft at 7 seconds and E
2 ft at 11 seconds, becoming E 7 ft at 8 seconds.
.MON NIGHT...E winds 15 to 20 kt, becoming SE 10 to 15 kt after
midnight. Seas 5 to 7 ft, subsiding to 5 to 6 ft after midnight.
Wave Detail: E 7 ft at 8 seconds, becoming E 6 ft at 8 seconds. A
slight chance of rain in the evening.
.TUE...S winds 5 to 10 kt, becoming SW in the afternoon. Seas
5 to 6 ft, subsiding to 4 to 6 ft in the afternoon. Wave Detail:
E 6 ft at 9 seconds, becoming E 5 ft at 9 seconds.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E
5 ft at 9 seconds.
.WED...NW winds 5 to 10 kt. Seas 3 to 4 ft.
.WED NIGHT...NE winds 5 kt. Seas 2 to 3 ft.
.THU...W winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
$$
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
1219 PM EST Sun Dec 21 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
AMZ300-220600-
1219 PM EST Sun Dec 21 2025
.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure continues to prevail today, with a cold front then
expected to dive across the region tonight into Monday. High
pressure then returns Tuesday, resulting in above normal
temperatures and dry conditions for the remainder of the holiday
week.
$$
AMZ330-220600-
Charleston Harbor-
1219 PM EST Sun Dec 21 2025
.THIS AFTERNOON...NW winds 5 kt, becoming NE late.
.TONIGHT...N winds 5 to 10 kt, becoming NE 15 to 20 kt after
midnight. Waves 1 to 2 ft.
.MON...NE winds 10 to 15 kt with gusts to 20 kt.
.MON NIGHT...NE winds 5 to 10 kt.
.TUE...SW winds 5 to 10 kt.
.TUE NIGHT...W winds 5 kt.
.WED...N winds 5 kt.
.WED NIGHT...E winds 5 kt.
.THU...W winds 5 to 10 kt.
.THU NIGHT...SW winds 5 to 10 kt.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 55 degrees.
$$
AMZ350-220600-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1219 PM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM EST THIS EVENING
THROUGH MONDAY EVENING...
.THIS AFTERNOON...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 8 seconds and NE 1 foot at 4 seconds.
.TONIGHT...NE winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. Seas 3 to 4 ft, building to 4 to 6 ft after midnight.
Wave Detail: NE 3 ft at 4 seconds and SE 2 ft at 10 seconds,
becoming NE 5 ft at 6 seconds and E 2 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. Wave Detail: E 6 ft at 8 seconds.
.MON NIGHT...NE winds 10 to 15 kt, becoming E 5 to 10 kt after
midnight. Seas 4 to 6 ft, subsiding to 4 to 5 ft after midnight.
Wave Detail: E 6 ft at 8 seconds, becoming E 5 ft at 9 seconds.
.TUE...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 9 seconds.
.TUE NIGHT...W winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 9 seconds and SW 2 ft at 4 seconds.
.WED...N winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...E winds 5 kt. Seas 2 ft.
.THU...W winds 5 to 10 kt. Seas 2 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
$$
AMZ352-220600-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1219 PM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EST TONIGHT
THROUGH MONDAY EVENING...
.THIS AFTERNOON...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 9 seconds and NE 1 foot at 5 seconds.
.TONIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas 2 to
3 ft, building to 4 to 5 ft after midnight. Wave Detail: NE 2 ft
at 5 seconds and SE 2 ft at 8 seconds, becoming NE 5 ft at
5 seconds and SE 2 ft at 10 seconds.
.MON...NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft,
building to 5 to 6 ft in the afternoon. Wave Detail: E 6 ft at
7 seconds and E 2 ft at 10 seconds, becoming E 6 ft at 8 seconds.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt, becoming E
5 to 10 kt after midnight. Seas 4 to 6 ft, subsiding to 4 to 5 ft
after midnight. Wave Detail: E 5 ft at 8 seconds, becoming E 5 ft
at 9 seconds.
.TUE...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at
9 seconds.
.TUE NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft.
.THU...W winds 5 to 10 kt. Seas 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
$$
AMZ354-220600-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1219 PM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EST TONIGHT
THROUGH MONDAY EVENING...
.THIS AFTERNOON...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 9 seconds and NE 1 foot at 4 seconds.
.TONIGHT...NE winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. Seas 2 to 3 ft, building to 4 to 5 ft after midnight.
Wave Detail: NE 2 ft at 5 seconds and E 2 ft at 9 seconds,
becoming NE 5 ft at 5 seconds and E 2 ft at 9 seconds.
.MON...NE winds 20 to 25 kt. Seas 4 to 6 ft, building to 5 to
6 ft in the afternoon. Wave Detail: NE 6 ft at 6 seconds and E
2 ft at 11 seconds, becoming E 6 ft at 7 seconds and E 1 foot at
11 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. Wave Detail: E 5 ft at
8 seconds.
.TUE...SE winds 5 kt, becoming SW in the afternoon. Seas 4 to
5 ft. Wave Detail: E 5 ft at 9 seconds.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...SE winds 5 kt. Seas 2 to 3 ft.
.THU...W winds 5 to 10 kt. Seas 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 ft.
$$
AMZ374-220600-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1219 PM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM EST THIS EVENING
THROUGH TUESDAY AFTERNOON...
.THIS AFTERNOON...N winds 5 to 10 kt. Seas 3 ft. Wave Detail: E
3 ft at 9 seconds and NE 1 foot at 5 seconds.
.TONIGHT...NE winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. Seas 4 to 5 ft, building to 5 to 7 ft after midnight.
Wave Detail: NE 4 ft at 5 seconds and E 3 ft at 9 seconds,
becoming NE 6 ft at 6 seconds and E 3 ft at 10 seconds.
.MON...NE winds 20 to 25 kt. Seas 6 to 7 ft, building to 6 to
8 ft in the afternoon. Wave Detail: NE 7 ft at 7 seconds and E
2 ft at 11 seconds, becoming E 7 ft at 8 seconds.
.MON NIGHT...E winds 15 to 20 kt, becoming SE 10 to 15 kt after
midnight. Seas 5 to 7 ft, subsiding to 5 to 6 ft after midnight.
Wave Detail: E 7 ft at 8 seconds, becoming E 6 ft at 8 seconds. A
slight chance of rain in the evening.
.TUE...S winds 5 to 10 kt, becoming SW in the afternoon. Seas
5 to 6 ft, subsiding to 4 to 6 ft in the afternoon. Wave Detail:
E 6 ft at 9 seconds, becoming E 5 ft at 9 seconds.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E
5 ft at 9 seconds.
.WED...NW winds 5 to 10 kt. Seas 3 to 4 ft.
.WED NIGHT...NE winds 5 kt. Seas 2 to 3 ft.
.THU...W winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
$$