266
FZUS52 KCHS 201716
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
1215 PM 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

AMZ300-210600-
1215 PM 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 sweep across
the region Saturday night, followed by more high pressure early
next week.

$$

AMZ330-210600-
Charleston Harbor-
1215 PM EST Thu Nov 20 2025

.THIS AFTERNOON...NE winds 5 to 10 kt.
.TONIGHT...NE winds 5 kt. Areas of fog after midnight.
.FRI...NW winds 5 kt, becoming SW in the afternoon. Areas of fog
in the morning.
.FRI NIGHT...SW winds 5 to 10 kt.
.SAT...SW winds 10 kt.
.SAT NIGHT...W 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 to 10 kt.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 62 degrees.

$$

AMZ350-210600-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1215 PM EST Thu Nov 20 2025

.THIS AFTERNOON...NE winds 10 kt. Seas 2 ft. Wave Detail: NE 2 ft
at 5 seconds and S 1 foot at 4 seconds.
.TONIGHT...NE winds 5 to 10 kt, diminishing to 5 kt after
midnight. Seas 2 ft. Wave Detail: NE 2 ft at 5 seconds and S
1 foot at 4 seconds. Patchy fog after midnight.
.FRI...NW winds 5 kt, becoming SW in the afternoon. Seas 2 ft.
Wave Detail: E 2 ft at 5 seconds. Patchy fog in the morning.
.FRI NIGHT...SW winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts to 20 kt after midnight. Seas 2 ft. Wave Detail: SW 2 ft at
4 seconds and E 1 foot at 5 seconds.
.SAT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft.
Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds.
.SAT NIGHT...W winds 10 to 15 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at
7 seconds.
.SUN...NE winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft.
.MON...NE winds 10 kt. Seas 2 to 3 ft.
.MON NIGHT...E winds 10 kt. Seas 2 to 3 ft.

$$

AMZ352-210600-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1215 PM EST Thu Nov 20 2025

.THIS AFTERNOON...NE winds 5 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 3 seconds and SE 1 foot at 6 seconds.
.TONIGHT...NE winds 5 kt. Seas 1 foot or less. Wave Detail: E
1 foot at 6 seconds. Areas of fog after midnight.
.FRI...W winds 5 kt, becoming SW in the afternoon. Seas 2 ft.
Wave Detail: S 1 foot at 2 seconds and E 1 foot at 6 seconds.
Areas of fog in the morning.
.FRI NIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt after
midnight. Seas 2 ft. Wave Detail: SW 2 ft at 3 seconds and E
1 foot at 6 seconds.
.SAT...SW winds 10 to 15 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 to 15 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.

$$

AMZ354-210600-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1215 PM EST Thu Nov 20 2025

.THIS AFTERNOON...NE winds 5 kt. Seas 1 foot or less. Wave
Detail: E 1 foot at 6 seconds. Patchy fog.
.TONIGHT...Variable winds 5 kt. Seas 1 foot or less. Wave Detail:
E 1 foot at 6 seconds. Patchy fog in the evening, then areas of
fog after midnight. Vsby 1 to 3 NM in the evening.
.FRI...W winds 5 kt, becoming S in the afternoon. Seas 1 foot or
less, then around 2 ft in the afternoon. Wave Detail: E 1 foot at
7 seconds, becoming S 1 foot at 2 seconds and E 1 foot at
6 seconds. Areas of dense fog in the morning.
.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 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 3 seconds and E 1 foot at
7 seconds.
.SUN...N winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...NE winds 10 to 15 kt. Seas 2 ft.
.MON...NE winds 10 to 15 kt. Seas 2 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 2 ft.

$$

AMZ374-210600-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1215 PM EST Thu Nov 20 2025

.THIS AFTERNOON...N winds 5 to 10 kt. Seas 2 ft. Wave Detail: W
1 foot at 3 seconds and E 1 foot at 7 seconds. Patchy fog.
.TONIGHT...N winds 5 kt. Seas 2 ft in the evening, then 1 foot or
less. Wave Detail: W 1 foot at 2 seconds and E 1 foot at
7 seconds, becoming E 1 foot at 7 seconds and E 1 foot at
13 seconds. Patchy fog in the evening, then areas of fog after
midnight. Vsby 1 to 3 NM in the evening.
.FRI...W winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at 6 seconds
and SW 1 foot at 2 seconds. Areas of fog in the morning.
.FRI NIGHT...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...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 NW with gusts to
20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at
4 seconds and E 1 foot at 7 seconds.
.SUN...N winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...NE winds 10 to 15 kt. Seas 2 ft.
.MON...NE winds 10 to 15 kt. Seas 2 to 3 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft.

$$