FZUS52 KCHS 210535
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
1235 AM 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
AMZ300-211800-
1235 AM 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.
$$
AMZ330-211800-
Charleston Harbor-
1235 AM EST Sun Dec 21 2025
.REST OF TONIGHT...Light and variable winds, becoming NW 5 kt
late.
.SUN...N winds 5 kt.
.SUN NIGHT...NE winds 5 to 10 kt, increasing to 15 to 20 kt after
midnight. Waves 1 to 2 ft.
.MON...NE winds 10 to 15 kt.
.MON NIGHT...NE winds 5 to 10 kt.
.TUE...SW winds 5 to 10 kt.
.TUE NIGHT...W winds 5 kt.
.WED...N winds 5 kt.
.WED NIGHT...NE winds 5 kt.
.THU...NW winds 5 to 10 kt.
.THU NIGHT...SW winds 5 to 10 kt.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 54 degrees.
$$
AMZ350-211800-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1235 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
MONDAY EVENING...
.REST OF TONIGHT...N winds 5 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 2 ft at 5 seconds.
.SUN...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and NE 1 foot at 5 seconds.
.SUN NIGHT...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
9 seconds, becoming NE 4 ft at 5 seconds and SE 2 ft at
10 seconds.
.MON...NE winds 20 to 25 kt with gusts to 30 kt, diminishing to
15 to 20 kt in the afternoon. 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, 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 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.
.WED...N winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...NE winds 5 kt. Seas 2 ft.
.THU...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
$$
AMZ352-211800-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1235 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY EVENING...
.REST OF TONIGHT...N winds 5 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 1 foot at 4 seconds.
.SUN...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 1 foot at 5 seconds.
.SUN NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas 2 to
3 ft, building to 4 to 5 ft after midnight. Wave Detail: NE 2 ft
at 5 seconds and SE 2 ft at 8 seconds, becoming NE 4 ft at
5 seconds and SE 2 ft at 10 seconds.
.MON...NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft.
Wave Detail: NE 6 ft at 6 seconds and E 2 ft at 10 seconds.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt, becoming E
5 to 10 kt after midnight. Seas 4 to 5 ft. Wave Detail: E 5 ft at
9 seconds.
.TUE...SW winds 5 to 10 kt. Seas 4 to 5 ft, subsiding to 3 to
4 ft in the afternoon. Wave Detail: E 4 ft at 9 seconds.
.TUE NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft.
.WED...N winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...NE winds 5 kt. Seas 2 to 3 ft.
.THU...NW winds 5 to 10 kt. Seas 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
$$
AMZ354-211800-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1235 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY EVENING...
.REST OF TONIGHT...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 9 seconds and NE 1 foot at 3 seconds.
.SUN...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and NE 1 foot at
4 seconds.
.SUN NIGHT...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, diminishing to 15 to 20 kt in the
afternoon. Seas 4 to 6 ft, building to 5 to 6 ft in the
afternoon. Wave Detail: E 5 ft at 6 seconds and E 2 ft at
11 seconds, becoming E 6 ft at 7 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. Wave Detail: E 5 ft at 8 seconds.
.TUE...S winds 5 kt. 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.
.WED...N winds 5 to 10 kt. Seas 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.
$$
AMZ374-211800-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1235 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
TUESDAY AFTERNOON...
.REST OF TONIGHT...NW winds 5 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 9 seconds and NE 1 foot at 4 seconds.
.SUN...N winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft at
9 seconds and NE 2 ft at 5 seconds.
.SUN NIGHT...NE winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. Seas 4 to 5 ft, building to 5 to 7 ft after
midnight. Wave Detail: NE 3 ft at 5 seconds and E 3 ft at
9 seconds, becoming NE 5 ft at 5 seconds and E 3 ft at
10 seconds.
.MON...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 6 to 7 ft. Wave Detail: E 7 ft at 7 seconds and E
2 ft at 10 seconds. A slight chance of rain in the afternoon.
.MON NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft, subsiding to
5 to 6 ft after midnight. Wave Detail: E 7 ft at 8 seconds,
becoming E 6 ft at 9 seconds. A slight chance of rain in the
evening.
.TUE...S winds 5 to 10 kt, becoming SW in the afternoon. Seas
5 to 6 ft. Wave Detail: E 6 ft at 9 seconds.
.TUE NIGHT...W winds 5 to 10 kt. Seas 4 to 5 ft.
.WED...NW winds 5 to 10 kt. Seas 3 to 4 ft.
.WED NIGHT...NE winds 5 kt. Seas 2 to 3 ft.
.THU...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.
$$
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
1235 AM 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
AMZ300-211800-
1235 AM 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.
$$
AMZ330-211800-
Charleston Harbor-
1235 AM EST Sun Dec 21 2025
.REST OF TONIGHT...Light and variable winds, becoming NW 5 kt
late.
.SUN...N winds 5 kt.
.SUN NIGHT...NE winds 5 to 10 kt, increasing to 15 to 20 kt after
midnight. Waves 1 to 2 ft.
.MON...NE winds 10 to 15 kt.
.MON NIGHT...NE winds 5 to 10 kt.
.TUE...SW winds 5 to 10 kt.
.TUE NIGHT...W winds 5 kt.
.WED...N winds 5 kt.
.WED NIGHT...NE winds 5 kt.
.THU...NW winds 5 to 10 kt.
.THU NIGHT...SW winds 5 to 10 kt.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 54 degrees.
$$
AMZ350-211800-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1235 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
MONDAY EVENING...
.REST OF TONIGHT...N winds 5 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 2 ft at 5 seconds.
.SUN...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and NE 1 foot at 5 seconds.
.SUN NIGHT...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
9 seconds, becoming NE 4 ft at 5 seconds and SE 2 ft at
10 seconds.
.MON...NE winds 20 to 25 kt with gusts to 30 kt, diminishing to
15 to 20 kt in the afternoon. 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, 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 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.
.WED...N winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...NE winds 5 kt. Seas 2 ft.
.THU...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
$$
AMZ352-211800-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1235 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY EVENING...
.REST OF TONIGHT...N winds 5 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 1 foot at 4 seconds.
.SUN...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 1 foot at 5 seconds.
.SUN NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas 2 to
3 ft, building to 4 to 5 ft after midnight. Wave Detail: NE 2 ft
at 5 seconds and SE 2 ft at 8 seconds, becoming NE 4 ft at
5 seconds and SE 2 ft at 10 seconds.
.MON...NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft.
Wave Detail: NE 6 ft at 6 seconds and E 2 ft at 10 seconds.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt, becoming E
5 to 10 kt after midnight. Seas 4 to 5 ft. Wave Detail: E 5 ft at
9 seconds.
.TUE...SW winds 5 to 10 kt. Seas 4 to 5 ft, subsiding to 3 to
4 ft in the afternoon. Wave Detail: E 4 ft at 9 seconds.
.TUE NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft.
.WED...N winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...NE winds 5 kt. Seas 2 to 3 ft.
.THU...NW winds 5 to 10 kt. Seas 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
$$
AMZ354-211800-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1235 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY EVENING...
.REST OF TONIGHT...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 9 seconds and NE 1 foot at 3 seconds.
.SUN...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and NE 1 foot at
4 seconds.
.SUN NIGHT...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, diminishing to 15 to 20 kt in the
afternoon. Seas 4 to 6 ft, building to 5 to 6 ft in the
afternoon. Wave Detail: E 5 ft at 6 seconds and E 2 ft at
11 seconds, becoming E 6 ft at 7 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. Wave Detail: E 5 ft at 8 seconds.
.TUE...S winds 5 kt. 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.
.WED...N winds 5 to 10 kt. Seas 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.
$$
AMZ374-211800-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1235 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
TUESDAY AFTERNOON...
.REST OF TONIGHT...NW winds 5 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 9 seconds and NE 1 foot at 4 seconds.
.SUN...N winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft at
9 seconds and NE 2 ft at 5 seconds.
.SUN NIGHT...NE winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. Seas 4 to 5 ft, building to 5 to 7 ft after
midnight. Wave Detail: NE 3 ft at 5 seconds and E 3 ft at
9 seconds, becoming NE 5 ft at 5 seconds and E 3 ft at
10 seconds.
.MON...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 6 to 7 ft. Wave Detail: E 7 ft at 7 seconds and E
2 ft at 10 seconds. A slight chance of rain in the afternoon.
.MON NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft, subsiding to
5 to 6 ft after midnight. Wave Detail: E 7 ft at 8 seconds,
becoming E 6 ft at 9 seconds. A slight chance of rain in the
evening.
.TUE...S winds 5 to 10 kt, becoming SW in the afternoon. Seas
5 to 6 ft. Wave Detail: E 6 ft at 9 seconds.
.TUE NIGHT...W winds 5 to 10 kt. Seas 4 to 5 ft.
.WED...NW winds 5 to 10 kt. Seas 3 to 4 ft.
.WED NIGHT...NE winds 5 kt. Seas 2 to 3 ft.
.THU...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.
$$