977
FZUS52 KCHS 171014
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
614 AM EDT Sat May 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

AMZ300-172300-
614 AM EDT Sat May 17 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Broad high pressure will persist through the weekend. A weak cold
front may push over the region early next week, remaining
generally stationary through Tuesday. A stronger cold front is
timed to sweep across the region Wednesday into Wednesday night,
followed by high pressure through late next week.

$$

AMZ330-172300-
Charleston Harbor-
614 AM EDT Sat May 17 2025

.TODAY...SW winds 10 to 15 kt with gusts to 20 kt. A slight
chance of showers and tstms late.
.TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt, becoming W
5 to 10 kt after midnight. A slight chance of showers and tstms
in the evening.
.SUN...SW winds 5 to 10 kt. A slight chance of showers and tstms
in the afternoon.
.SUN NIGHT...SW winds 5 to 10 kt. A slight chance of showers and
tstms in the evening.
.MON...W winds 5 kt, becoming S in the afternoon. A slight chance
of showers and tstms in the afternoon.
.MON NIGHT...SW winds 5 kt. A slight chance of showers and tstms
in the evening.
.TUE...SW winds 5 to 10 kt.
.TUE NIGHT...SW winds 10 kt.
.WED...SW winds 10 to 15 kt. A chance of showers and tstms.
.WED NIGHT...W winds 10 to 15 kt. A chance of showers and tstms.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 77 degrees.

$$

AMZ350-172300-
Waters from South Santee River to Edisto Beach SC out 20 NM-
614 AM EDT Sat May 17 2025

.TODAY...SW winds 10 to 15 kt, increasing to 15 to 20 kt late.
Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at
8 seconds.
.TONIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after
midnight. Seas 3 to 4 ft, subsiding to 2 to 3 ft after midnight.
Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 8 seconds,
becoming SW 3 ft at 5 seconds and SE 2 ft at 8 seconds. A slight
chance of showers and tstms in the evening.
.SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 5 seconds and SE 2 ft at 8 seconds. A slight chance of showers
and tstms in the afternoon.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SW 2 ft
at 5 seconds and SE 2 ft at 8 seconds. A slight chance of showers
and tstms.
.MON...W winds 5 to 10 kt, becoming S in the afternoon. Seas
2 ft. Wave Detail: SE 2 ft at 9 seconds and S 1 foot at
5 seconds. A slight chance of showers and tstms in the afternoon.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft
at 5 seconds and SE 1 foot at 9 seconds.
.TUE...SW winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...SW winds 10 kt. Seas 2 to 3 ft.
.WED...SW winds 15 to 20 kt. Seas 4 to 5 ft. A slight chance of
showers and tstms.
.WED NIGHT...W winds 15 to 20 kt. Seas 3 to 4 ft. A chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-172300-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
614 AM EDT Sat May 17 2025

.TODAY...SW winds 10 to 15 kt. Gusts to 25 kt this morning. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at
8 seconds.
.TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt, becoming W
5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and SE 2 ft at 8 seconds. A slight chance of showers
and tstms in the evening.
.SUN...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 8 seconds.
A slight chance of showers and tstms in the afternoon.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 8 seconds and S 1 foot at 4 seconds. A slight chance of
showers and tstms.
.MON...W winds 5 kt, becoming S in the afternoon. Seas 2 ft. Wave
Detail: SE 2 ft at 9 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 9 seconds and S 1 foot at 5 seconds.
.TUE...SW winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...SW winds 10 kt. Seas 2 to 3 ft.
.WED...SW winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of
showers and tstms.
.WED NIGHT...W winds 10 to 15 kt. Seas 3 to 4 ft. A chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-172300-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
614 AM EDT Sat May 17 2025

.TODAY...W winds 10 to 15 kt with gusts to 20 kt, becoming SW
late. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE
2 ft at 8 seconds.
.TONIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and
SE 2 ft at 8 seconds. A slight chance of showers and tstms in the
evening.
.SUN...W winds 5 to 10 kt, becoming S in the afternoon. Seas
2 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 8 seconds.
A chance of showers and tstms in the afternoon.
.SUN NIGHT...S winds 10 kt, becoming SW after midnight. Seas
2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at
4 seconds. A chance of showers and tstms, mainly in the evening.
.MON...W winds 5 kt, becoming S in the afternoon. Seas 2 ft. Wave
Detail: S 1 foot at 4 seconds and SE 1 foot at 8 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 8 seconds and S 1 foot at 4 seconds.
.TUE...SW winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...SW winds 10 kt. Seas 2 to 3 ft.
.WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.WED NIGHT...W winds 10 to 15 kt. Seas 3 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-172300-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
614 AM EDT Sat May 17 2025

.TODAY...W winds 10 to 15 kt with gusts to 20 kt, becoming SW
late. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE
2 ft at 8 seconds.
.TONIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SW 2 ft
at 4 seconds and SE 2 ft at 8 seconds. A slight chance of showers
and tstms in the evening.
.SUN...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at
8 seconds. A chance of showers and tstms in the afternoon.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft
at 4 seconds and SE 2 ft at 8 seconds. A chance of showers and
tstms, mainly in the evening.
.MON...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 9 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft
at 3 seconds and SE 2 ft at 9 seconds.
.TUE...SW winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft.
.WED...SW winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of
showers and tstms.
.WED NIGHT...W winds 15 kt. Seas 3 to 4 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$