858
FZUS52 KCHS 202139
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
439 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

AMZ300-211000-
439 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.

$$

AMZ330-211000-
Charleston Harbor-
439 PM EST Thu Nov 20 2025

.TONIGHT...NE winds 5 kt until early morning, becoming light and
variable. Patchy fog after midnight. Areas of fog late.
.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.
.TUE...SE winds 5 to 10 kt. A slight chance of showers.
.TUE NIGHT...S winds 5 to 10 kt. A chance of showers.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 62 degrees.

$$

AMZ350-211000-
Waters from South Santee River to Edisto Beach SC out 20 NM-
439 PM EST Thu Nov 20 2025

.TONIGHT...NE winds 5 to 10 kt, diminishing to 5 kt late. Seas
2 ft. Wave Detail: E 2 ft at 5 seconds and S 1 foot at 4 seconds.
Patchy fog late.
.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 to 3 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 3 ft at 5 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 3 ft at 5 seconds and E 1 foot at
7 seconds.
.SUN...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft
at 5 seconds and SW 2 ft at 5 seconds.
.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.
.TUE...SE winds 10 kt. Seas 3 to 4 ft. A slight chance of
showers.
.TUE NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A chance of
showers.

$$

AMZ352-211000-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
439 PM EST Thu Nov 20 2025

.TONIGHT...NE winds 5 kt, becoming NW late. Seas 1 foot or less.
Wave Detail: NE 1 foot at 5 seconds. Patchy fog after midnight.
Areas of fog late.
.FRI...W winds 5 kt, becoming SW in the afternoon. Seas 2 ft.
Wave Detail: 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 4 seconds and E
1 foot at 5 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. Wave Detail: W 2 ft at
4 seconds and NE 2 ft at 7 seconds.
.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.
.TUE...SE winds 10 kt. Seas 2 to 3 ft. A slight chance of
showers.
.TUE NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance
of showers.

$$

AMZ354-211000-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
439 PM EST Thu Nov 20 2025

.TONIGHT...NE winds 5 kt, becoming W late. Seas 1 foot or less.
Wave Detail: NE 1 foot at 6 seconds. Patchy fog until early
morning, then areas of dense fog late. Vsby 1 to 3 NM this
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
6 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 2 ft at
3 seconds and E 1 foot at 6 seconds.
.SAT...SW winds 10 kt. Seas 2 ft. Wave Detail: S 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...N winds 10 to 15 kt. Seas 2 ft. Wave Detail: NW 2 ft at
4 seconds and E 2 ft at 7 seconds.
.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.
.TUE...SE winds 10 kt. Seas 2 to 3 ft.
.TUE NIGHT...S winds 10 kt. Seas 3 ft. A slight chance of
showers.

$$

AMZ374-211000-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
439 PM EST Thu Nov 20 2025

.TONIGHT...NE winds 5 kt, becoming NW late. Seas 2 ft this
evening, then 1 foot or less. Wave Detail: NW 1 foot at 2 seconds
and NE 1 foot at 7 seconds, becoming NE 1 foot at 7 seconds and E
1 foot at 13 seconds. Patchy fog late this evening. Areas of fog
late. Vsby 1 to 3 NM late this evening.
.FRI...W winds 5 kt. Seas 2 ft. Wave Detail: NE 2 ft at 6 seconds
and E 1 foot at 13 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 1 foot 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 to 3 ft. Wave Detail: NE 3 ft
at 7 seconds and NW 2 ft at 3 seconds.
.SUN NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft.
.MON...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE...S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of
showers.
.TUE NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance
of showers.

$$