937
FZUS52 KCHS 172324
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
724 PM EDT Fri Oct 17 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

AMZ300-181200-
724 PM EDT Fri Oct 17 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will remain across the region through Saturday. A
cold front will move through Sunday night, followed by high
pressure early next week. Another cold front will then arrive
during the middle of next week.

$$

AMZ330-181200-
Charleston Harbor-
724 PM EDT Fri Oct 17 2025

.TONIGHT...SE winds 5 kt until early morning, becoming light and
variable.
.SAT...Variable winds 5 kt.
.SAT NIGHT...S winds 5 kt.
.SUN...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts to
20 kt in the afternoon.
.SUN NIGHT...SW winds 10 to 15 kt, becoming W after midnight.
.MON...N winds 5 to 10 kt.
.MON NIGHT...SE winds 5 kt, becoming SW after midnight.
.TUE...SW winds 5 to 10 kt.
.TUE NIGHT...SW winds 10 kt.
.WED...N winds 10 kt.
.WED NIGHT...NE winds 5 to 10 kt.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 70 degrees.

$$

AMZ350-181200-
Waters from South Santee River to Edisto Beach SC out 20 NM-
724 PM EDT Fri Oct 17 2025

.TONIGHT...E winds 5 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft
after midnight. Wave Detail: E 4 ft at 9 seconds, becoming E 3 ft
at 9 seconds.
.SAT...NE winds 5 kt, becoming SE in the afternoon. Seas 2 to
3 ft. Wave Detail: E 3 ft at 9 seconds.
.SAT NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 12 seconds and E 2 ft at 9 seconds.
.SUN...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: S 4 ft at 5 seconds and E
3 ft at 13 seconds.
.SUN NIGHT...SW winds 15 to 20 kt, becoming W after midnight.
Seas 4 to 5 ft. Wave Detail: S 4 ft at 5 seconds and E 2 ft at
12 seconds. A slight chance of showers. A slight chance of tstms
after midnight.
.MON...N winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the
afternoon. Wave Detail: S 4 ft at 6 seconds and NW 2 ft at
3 seconds, becoming N 2 ft at 3 seconds and S 2 ft at 6 seconds.
.MON NIGHT...E winds 5 to 10 kt, becoming SW after midnight. Seas
2 to 3 ft.
.TUE...SW winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft.
.WED...N winds 10 to 15 kt. Seas 2 to 3 ft.
.WED NIGHT...N winds 10 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ352-181200-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
724 PM EDT Fri Oct 17 2025

.TONIGHT...E winds 5 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at
9 seconds.
.SAT...SE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
9 seconds.
.SAT NIGHT...SE winds 5 kt, becoming S after midnight. Seas 2 to
3 ft. Wave Detail: E 2 ft at 9 seconds and E 1 foot at
12 seconds.
.SUN...S winds 10 to 15 kt. Seas 2 to 3 ft, building to 3 to 4 ft
in the afternoon. Wave Detail: S 2 ft at 4 seconds and E 2 ft at
11 seconds, becoming S 3 ft at 4 seconds and E 2 ft at
13 seconds.
.SUN NIGHT...SW winds 15 kt, becoming NW after midnight. Seas
3 to 4 ft. Wave Detail: S 4 ft at 5 seconds and E 2 ft at
12 seconds.
.MON...N winds 10 to 15 kt with gusts to 20 kt, becoming NE 5 to
10 kt in the afternoon. Seas 3 to 4 ft, subsiding to 2 to 3 ft in
the afternoon. Wave Detail: S 3 ft at 5 seconds and NW 2 ft at
3 seconds, becoming N 2 ft at 3 seconds and S 2 ft at 5 seconds.
.MON NIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas
2 ft.
.TUE...SW winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.WED...N winds 10 to 15 kt. Seas 2 to 3 ft.
.WED NIGHT...NE winds 5 to 10 kt. Seas 2 ft.

$$

AMZ354-181200-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
724 PM EDT Fri Oct 17 2025

.TONIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 10 seconds.
.SAT...SE winds 5 to 10 kt. Seas 3 to 4 ft, subsiding to 2 to
3 ft in the afternoon. Wave Detail: E 3 ft at 9 seconds.
.SAT NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds.
.SUN...S winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft
at 4 seconds and E 3 ft at 9 seconds.
.SUN NIGHT...SW winds 15 kt, becoming NW after midnight. Seas
3 to 4 ft. Wave Detail: S 3 ft at 5 seconds and E 2 ft at
13 seconds.
.MON...N winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to
3 ft in the afternoon. Wave Detail: NW 2 ft at 3 seconds and S
2 ft at 5 seconds, becoming N 2 ft at 3 seconds and E 2 ft at
12 seconds.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE...W winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.WED...N winds 10 to 15 kt. Seas 2 to 3 ft.
.WED NIGHT...NE winds 10 kt. Seas 2 ft.

$$

AMZ374-181200-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
724 PM EDT Fri Oct 17 2025

.TONIGHT...E winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E
5 ft at 9 seconds.
.SAT...E winds 5 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft in
the afternoon. Wave Detail: E 5 ft at 9 seconds, becoming E 4 ft
at 9 seconds.
.SAT NIGHT...SE winds 5 to 10 kt, becoming S 10 to 15 kt after
midnight. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SE
1 foot at 12 seconds.
.SUN...S winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E 4 ft
at 11 seconds and S 3 ft at 4 seconds.
.SUN NIGHT...S winds 15 to 20 kt, becoming W after midnight. Seas
4 to 6 ft. Wave Detail: S 4 ft at 5 seconds and E 4 ft at
13 seconds.
.MON...N winds 15 to 20 kt with gusts to 25 kt, becoming NE 10 to
15 kt in the afternoon. Seas 4 to 5 ft. Wave Detail: NW 3 ft at
4 seconds and S 3 ft at 5 seconds.
.MON NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft, subsiding to
2 to 3 ft after midnight.
.TUE...W winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.WED...N winds 15 to 20 kt. Seas 3 to 4 ft.
.WED NIGHT...NE winds 10 kt. Seas 2 to 3 ft.

$$