Coastal Waters Forecast
Issued by NWS Charleston, SC

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FZUS52 KCHS 201011
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
611 AM EDT Sun Apr 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

AMZ300-202315-
611 AM EDT Sun Apr 20 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will linger across the region into Tuesday. A front
will approach the region by midweek then become stationary over
or near the area through late week.

$$

AMZ330-202315-
Charleston Harbor-
611 AM EDT Sun Apr 20 2025

.TODAY...S winds around 10 kt, increasing to 10 to 15 kt this
afternoon.
.TONIGHT...S winds 5 to 10 kt.
.MON...S winds 5 to 10 kt.
.MON NIGHT...S winds 5 to 10 kt.
.TUE...SW winds 5 kt, becoming S in the afternoon.
.TUE NIGHT...S winds 5 to 10 kt.
.WED...S winds 5 to 10 kt. A slight chance of showers and tstms.
.WED NIGHT...S winds 5 to 10 kt. A slight chance of showers and
tstms.
.THU...SE winds 5 to 10 kt. A slight chance of showers and tstms.
.THU NIGHT...SE 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 70 degrees.

$$

AMZ350-202315-
Waters from South Santee River to Edisto Beach SC out 20 NM-
611 AM EDT Sun Apr 20 2025

.TODAY...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3
ft at 7 seconds.
.TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds.
.MON...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds.
.TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds.
.TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds.
.WED...S winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.
.THU...SE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
and tstms.
.THU NIGHT...SE winds 5 to 10 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ352-202315-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
611 AM EDT Sun Apr 20 2025

.TODAY...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3
ft at 7 seconds.
.TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds.
.MON...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds.
.TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds.
.TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds.
.WED...S winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft.
.THU...SE winds 5 to 10 kt. Seas 2 ft.
.THU NIGHT...SE winds 5 to 10 kt. Seas 2 ft.

$$

AMZ354-202315-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
611 AM EDT Sun Apr 20 2025

.TODAY...SE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds.
.TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds.
.MON...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.MON NIGHT...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds.
.TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds.
.TUE NIGHT...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds.
.WED...S winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.

$$

AMZ374-202315-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
611 AM EDT Sun Apr 20 2025

.TODAY...S winds 10 to 15 kt, becoming SE late. Seas 3 to 4 ft.
Wave Detail: E 3 ft at 7 seconds.
.TONIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE
3 ft at 8 seconds and E 1 foot at 7 seconds.
.MON...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft
at 8 seconds and E 1 foot at 7 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 8 seconds and E 1 foot at 7 seconds.
.TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and E 1 foot at 8 seconds.
.TUE NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 8 seconds and E 1 foot at 8 seconds.
.WED...S winds 5 kt. Seas 3 ft.
.WED NIGHT...SE winds 5 to 10 kt. Seas 3 ft.
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.

$$