962
FZUS52 KCHS 181741
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
141 PM EDT Sat Oct 18 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

AMZ300-190615-
141 PM EDT Sat Oct 18 2025

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

$$

AMZ330-190615-
Charleston Harbor-
141 PM EDT Sat Oct 18 2025

.THIS AFTERNOON...S winds 5 to 10 kt.
.TONIGHT...S winds 5 to 10 kt.
.SUN...S winds 10 to 15 kt.
.SUN NIGHT...SW winds 15 kt, becoming NW after midnight. Gusts to
25 kt. A slight chance of showers and tstms.
.MON...N winds 5 to 10 kt.
.MON NIGHT...NE winds 5 kt.
.TUE...SW winds 5 to 10 kt.
.TUE NIGHT...SW winds 5 to 10 kt.
.WED...W winds 10 kt.
.WED NIGHT...NW winds 5 to 10 kt.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 71 degrees.

$$

AMZ350-190615-
Waters from South Santee River to Edisto Beach SC out 20 NM-
141 PM EDT Sat Oct 18 2025

.THIS AFTERNOON...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 10 seconds.
.TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 11 seconds and S 2 ft at 3 seconds.
.SUN...S winds 10 to 15 kt, becoming SW 15 to 20 kt with gusts to
25 kt in the afternoon. Seas 3 to 4 ft, building to 4 to 5 ft in
the afternoon. Wave Detail: S 3 ft at 4 seconds and E 3 ft at
13 seconds, becoming S 4 ft at 5 seconds and E 3 ft at
12 seconds.
.SUN NIGHT...SW winds 20 kt, becoming W after midnight. Seas 5 to
6 ft, subsiding to 4 to 6 ft after midnight. Wave Detail: S 6 ft
at 6 seconds and E 2 ft at 12 seconds, becoming SW 6 ft at
7 seconds and E 2 ft at 11 seconds. A slight chance of showers
and tstms.
.MON...N winds 15 to 20 kt, diminishing to 5 to 10 kt in the
afternoon. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the
afternoon. Wave Detail: NW 5 ft at 6 seconds and E 2 ft at
11 seconds, becoming SW 3 ft at 5 seconds and NE 2 ft at
11 seconds.
.MON NIGHT...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 5 seconds and NE 2 ft at 9 seconds.
.TUE...W winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.WED...W winds 10 to 15 kt. Seas 2 to 3 ft.
.WED NIGHT...NW winds 10 to 15 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ352-190615-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
141 PM EDT Sat Oct 18 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 9 seconds.
.TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 3 seconds and E 2 ft at 9 seconds.
.SUN...S winds 10 to 15 kt, increasing to 15 to 20 kt with gusts
to 25 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: S 4 ft at
5 seconds and E 2 ft at 12 seconds.
.SUN NIGHT...SW winds 15 to 20 kt, becoming NW after midnight.
Seas 4 to 5 ft. Wave Detail: S 5 ft at 6 seconds and E 2 ft at
12 seconds. A slight chance of showers and tstms.
.MON...N winds 15 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: NW 4 ft at 5 seconds and E 2 ft at
11 seconds, becoming SW 3 ft at 5 seconds and NE 2 ft at
10 seconds.
.MON NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds and S 1 foot at 4 seconds.
.TUE...NW winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 ft.
.WED...NW winds 10 to 15 kt. Seas 2 ft.
.WED NIGHT...NW winds 10 to 15 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ354-190615-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
141 PM EDT Sat Oct 18 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 9 seconds.
.TONIGHT...SE winds 5 to 10 kt, becoming S 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and S
2 ft at 3 seconds.
.SUN...S 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
2 ft at 12 seconds.
.SUN NIGHT...SW winds 15 to 20 kt, becoming NW after midnight.
Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight. Wave
Detail: S 4 ft at 5 seconds and E 2 ft at 13 seconds, becoming SW
4 ft at 5 seconds and E 2 ft at 13 seconds. A slight chance of
showers. A slight chance of tstms after midnight.
.MON...N winds 15 to 20 kt, becoming NE 10 to 15 kt in the
afternoon. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the
afternoon. Wave Detail: NW 3 ft at 4 seconds and E 2 ft at
12 seconds, becoming SE 3 ft at 5 seconds and NE 3 ft at
7 seconds.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE
2 ft at 8 seconds and SE 1 foot at 4 seconds.
.TUE...NE winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 ft.
.WED...NW winds 10 to 15 kt. Seas 2 ft.
.WED NIGHT...NW winds 10 to 15 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ374-190615-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
141 PM EDT Sat Oct 18 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave
Detail: E 4 ft at 9 seconds.
.TONIGHT...SE winds 5 to 10 kt, becoming S 10 to 15 kt after
midnight. Seas 3 to 4 ft, building to 4 to 5 ft after midnight.
Wave Detail: E 4 ft at 9 seconds, becoming E 4 ft at 10 seconds
and S 3 ft at 4 seconds.
.SUN...S winds 15 to 20 kt. Seas 4 to 5 ft, building to 4 to 6 ft
in the afternoon. Wave Detail: S 3 ft at 4 seconds and E 3 ft at
12 seconds, becoming S 4 ft at 5 seconds and E 3 ft at
13 seconds.
.SUN NIGHT...SW winds 20 kt, becoming W after midnight. Seas 5 to
6 ft, subsiding to 4 to 6 ft after midnight. Wave Detail: S 5 ft
at 5 seconds and E 3 ft at 13 seconds, becoming SW 5 ft at
5 seconds and E 3 ft at 12 seconds. A slight chance of showers
and tstms.
.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 4 ft at
5 seconds and E 3 ft at 12 seconds.
.MON NIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft, subsiding to
2 to 3 ft after midnight. Wave Detail: NE 3 ft at 8 seconds and S
1 foot at 4 seconds, becoming E 3 ft at 9 seconds.
.TUE...N winds 5 kt. Seas 2 to 3 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.WED...NW winds 10 to 15 kt. Seas 2 to 3 ft.
.WED NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

$$