679
FZUS52 KCHS 170939
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
538 AM 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

AMZ300-172200-
538 AM 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 another
area of high pressure.

$$

AMZ330-172200-
Charleston Harbor-
538 AM EDT Fri Oct 17 2025

.TODAY...NE winds 5 to 10 kt.
.TONIGHT...NE winds 5 kt in the evening, becoming light and
variable.
.SAT...NE winds 5 kt, becoming SE in the afternoon.
.SAT NIGHT...S winds 5 to 10 kt.
.SUN...SW winds 5 to 10 kt, increasing to 15 to 20 kt in the
afternoon. Waves 1 to 2 ft.
.SUN NIGHT...SW winds 15 kt, becoming W after midnight.
.MON...N winds 10 to 15 kt.
.MON NIGHT...N winds 5 to 10 kt.
.TUE...SW winds 10 to 15 kt.
.TUE NIGHT...SW winds 10 to 15 kt.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 71 degrees.

$$

AMZ350-172200-
Waters from South Santee River to Edisto Beach SC out 20 NM-
538 AM EDT Fri Oct 17 2025

.TODAY...NE winds 10 to 15 kt with gusts to 20 kt, diminishing to
5 to 10 kt late. Seas 3 to 4 ft. Wave Detail: E 4 ft at
10 seconds.
.TONIGHT...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
9 seconds.
.SAT...Variable winds 5 kt. 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.
.SUN...SW winds 10 kt, increasing to 15 to 20 kt in the
afternoon. Seas 2 to 3 ft, building to 3 to 4 ft in the
afternoon. Wave Detail: E 3 ft at 13 seconds and S 2 ft at
3 seconds, becoming S 3 ft at 4 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.
.MON...N winds 15 to 20 kt. Seas 3 to 4 ft.
.MON NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE...W winds 10 to 15 kt. Seas 2 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.

$$

AMZ352-172200-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
538 AM EDT Fri Oct 17 2025

.TODAY...NE winds 10 to 15 kt with gusts to 20 kt, diminishing to
5 to 10 kt late. Seas 3 to 4 ft. Wave Detail: E 4 ft at
10 seconds.
.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds.
.SAT...E winds 5 kt. 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
2 ft at 9 seconds.
.SUN...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts to
20 kt in the afternoon. Seas 2 to 3 ft, building to 3 to 4 ft in
the afternoon. Wave Detail: E 3 ft at 12 seconds and S 1 foot at
3 seconds, becoming S 3 ft at 4 seconds and E 2 ft at 13 seconds.
.SUN NIGHT...SW winds 15 kt, becoming W 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.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 ft.
.TUE...W winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.

$$

AMZ354-172200-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
538 AM EDT Fri Oct 17 2025

.TODAY...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 10 seconds.
.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 10 seconds.
.SAT...E winds 5 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...SE 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 2 to 3 ft, building to 3 to 4 ft
in the afternoon. Wave Detail: E 3 ft at 11 seconds and S 1 foot
at 3 seconds, becoming S 3 ft at 4 seconds and E 2 ft at
13 seconds.
.SUN NIGHT...SW winds 15 kt, becoming W after midnight. Seas 3 to
4 ft. Wave Detail: S 3 ft at 4 seconds and E 2 ft at 14 seconds.
.MON...N winds 10 to 15 kt. Seas 3 to 4 ft.
.MON NIGHT...SE 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 ft.

$$

AMZ374-172200-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
538 AM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.TODAY...NE winds 10 to 15 kt. Seas 4 to 6 ft, subsiding to 4 to
5 ft this afternoon. Wave Detail: E 6 ft at 10 seconds, becoming
E 5 ft at 10 seconds.
.TONIGHT...NE 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 after midnight. Seas
3 to 4 ft. Wave Detail: E 4 ft at 9 seconds.
.SUN...SW winds 10 to 15 kt. Seas 3 to 4 ft, building to 4 to
5 ft in the afternoon. Wave Detail: E 4 ft at 12 seconds and S
2 ft at 3 seconds, becoming E 4 ft at 13 seconds and S 3 ft at
4 seconds.
.SUN NIGHT...S winds 15 kt, becoming W after midnight. Seas 4 to
5 ft, building to 4 to 6 ft after midnight. Wave Detail: S 4 ft
at 4 seconds and E 4 ft at 13 seconds, becoming SW 4 ft at
5 seconds and E 4 ft at 12 seconds.
.MON...N winds 15 to 20 kt. Seas 4 to 5 ft.
.MON NIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft.
.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.

$$