212
FZUS52 KCHS 200939
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
439 AM EST Thu Nov 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

AMZ300-202200-
439 AM EST Thu Nov 20 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Dry high pressure is expected to prevail across the area through
the rest of the week. A cold front is expected to move through
this weekend, followed by more high pressure early next week.

$$

AMZ330-202200-
Charleston Harbor-
439 AM EST Thu Nov 20 2025

.TODAY...NE winds 5 kt.
.TONIGHT...NE winds 5 kt.
.FRI...SW winds 5 kt, increasing to 5 to 10 kt in the afternoon.
.FRI NIGHT...SW winds 5 to 10 kt.
.SAT...SW winds 10 kt.
.SAT NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
.SUN...NE winds 10 kt.
.SUN NIGHT...NE winds 5 to 10 kt.
.MON...NE winds 5 to 10 kt.
.MON NIGHT...E winds 5 kt.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 62 degrees.

$$

AMZ350-202200-
Waters from South Santee River to Edisto Beach SC out 20 NM-
439 AM EST Thu Nov 20 2025

.TODAY...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 1 foot at
4 seconds and E 1 foot at 6 seconds.
.TONIGHT...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: NE 2 ft
at 6 seconds and S 1 foot at 4 seconds.
.FRI...NW winds 5 kt, becoming SW in the afternoon. Seas 2 ft.
Wave Detail: E 2 ft at 6 seconds.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 2 ft. Wave Detail: SW
2 ft at 3 seconds and E 1 foot at 5 seconds.
.SAT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and E 1 foot at 7 seconds.
.SAT NIGHT...SW winds 10 to 15 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
7 seconds.
.SUN...NE winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.MON...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft.

$$

AMZ352-202200-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
439 AM EST Thu Nov 20 2025

.TODAY...N winds 5 kt, becoming NE late. Seas 1 foot or less.
Wave Detail: SE 1 foot at 5 seconds.
.TONIGHT...E winds 5 kt. Seas 1 foot or less. Wave Detail: E
1 foot at 6 seconds.
.FRI...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
6 seconds.
.FRI NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 6 seconds and SW 1 foot at 2 seconds.
.SAT...SW winds 10 kt. Seas 2 ft. Wave Detail: SW 2 ft at
4 seconds and E 1 foot at 6 seconds.
.SAT NIGHT...SW winds 10 kt, becoming NW after midnight. Seas
2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
7 seconds.
.SUN...NE winds 10 kt. Seas 2 ft.
.SUN NIGHT...NE winds 5 to 10 kt. Seas 2 ft.
.MON...NE winds 10 kt. Seas 2 ft.
.MON NIGHT...E winds 10 kt. Seas 2 ft.

$$

AMZ354-202200-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
439 AM EST Thu Nov 20 2025

.TODAY...NW winds 5 kt, becoming E late. Seas 1 to 2 ft. Wave
Detail: S 1 foot at 4 seconds and E 1 foot at 6 seconds, becoming
E 1 foot at 6 seconds.
.TONIGHT...E winds 5 kt. Seas 1 foot or less. Wave Detail: E
1 foot at 6 seconds.
.FRI...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: E 1 foot at 6 seconds, becoming S
1 foot at 2 seconds and E 1 foot at 6 seconds.
.FRI NIGHT...SW winds 10 kt. Seas 2 ft. Wave Detail: S 1 foot at
3 seconds and E 1 foot at 6 seconds.
.SAT...SW winds 10 kt. Seas 2 ft. Wave Detail: SW 1 foot at
3 seconds and E 1 foot at 6 seconds.
.SAT NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas
2 ft. Wave Detail: S 1 foot at 3 seconds and E 1 foot at
7 seconds.
.SUN...N winds 10 kt. Seas 2 ft.
.SUN NIGHT...NE winds 10 kt. Seas 2 ft.
.MON...NE winds 10 kt. Seas 2 ft.
.MON NIGHT...E winds 10 kt. Seas 2 ft.

$$

AMZ374-202200-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
439 AM EST Thu Nov 20 2025

.TODAY...NW winds 5 to 10 kt, becoming N late. Seas 2 ft. Wave
Detail: W 1 foot at 3 seconds and E 1 foot at 7 seconds.
.TONIGHT...NE winds 5 kt. Seas 2 ft in the evening, then 1 foot
or less. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at
7 seconds, becoming E 1 foot at 7 seconds and E 1 foot at
13 seconds.
.FRI...NW winds 5 kt, becoming SW in the afternoon. Seas 2 ft.
Wave Detail: NE 2 ft at 6 seconds and E 1 foot at 13 seconds.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SW 2 ft at 3 seconds and NE 2 ft at 6 seconds.
.SAT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and NE 2 ft at 6 seconds.
.SAT NIGHT...SW winds 10 to 15 kt, becoming W after midnight.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at
7 seconds.
.SUN...N winds 10 kt. Seas 2 ft.
.SUN NIGHT...NE winds 10 kt. Seas 2 ft.
.MON...NE winds 10 kt. Seas 2 to 3 ft.
.MON NIGHT...E winds 10 kt. Seas 2 to 3 ft.

$$