National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Coastal Waters Forecast
Issued by NWS Charleston, SC

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FZUS52 KCHS 181859
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
259 PM EDT Fri Apr 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

AMZ300-190700-
259 PM EDT Fri Apr 18 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will persist into early next week. A front could
push into the region by the middle of next week.

$$

AMZ330-190700-
Charleston Harbor-
259 PM EDT Fri Apr 18 2025

.TONIGHT...S winds 5 to 10 kt.
.SAT...S winds 5 to 10 kt.
.SAT NIGHT...S winds 5 to 10 kt.
.SUN...S winds 5 kt, increasing to 10 kt in the afternoon.
.SUN NIGHT...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 to 10 kt.
.TUE NIGHT...S winds 5 to 10 kt.
.WED...S winds 5 to 10 kt. A chance of showers and tstms.
.WED NIGHT...SE winds 5 kt. A slight 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 68 degrees.

$$

AMZ350-190700-
Waters from South Santee River to Edisto Beach SC out 20 NM-
259 PM EDT Fri Apr 18 2025

.TONIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 5 seconds and SE 1 foot at 8 seconds.
.SAT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
7 seconds.
.SAT NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 6 seconds.
.SUN...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.SUN NIGHT...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 10 kt. Seas 2 to 3 ft.
.TUE...SW winds 10 kt. Seas 2 to 3 ft.
.TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft.
.WED...S winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.WED NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-190700-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
259 PM EDT Fri Apr 18 2025

.TONIGHT...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at
5 seconds and SE 1 foot at 8 seconds.
.SAT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 5 seconds and SE 1 foot at 8 seconds.
.SAT NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds.
.SUN...S winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at
7 seconds.
.SUN NIGHT...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 8 seconds.
.MON NIGHT...S winds 10 kt. Seas 2 to 3 ft.
.TUE...S winds 5 to 10 kt. Seas 2 to 3 ft.
.TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft.
.WED...S winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-190700-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
259 PM EDT Fri Apr 18 2025

.TONIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 5 seconds and E 1 foot at 8 seconds.
.SAT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 5 seconds and E 1 foot at 8 seconds.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 7 seconds.
.SUN...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 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 10 to 15 kt. Seas 2 to 3 ft.
.TUE...S winds 10 kt. Seas 2 to 3 ft.
.TUE NIGHT...S winds 10 kt. Seas 2 to 3 ft.
.WED...S winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.WED NIGHT...SE winds 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-190700-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
259 PM EDT Fri Apr 18 2025

.TONIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 5 seconds and SE 1 foot at 8 seconds.
.SAT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft
at 6 seconds.
.SAT NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE
3 ft at 7 seconds.
.SUN...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at
7 seconds.
.SUN NIGHT...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 10 kt. Seas 3 ft.
.TUE...S winds 5 to 10 kt. Seas 3 ft.
.TUE NIGHT...S winds 10 kt. Seas 3 to 4 ft.
.WED...S winds 5 to 10 kt. Seas 3 ft.
.WED NIGHT...SE winds 5 to 10 kt. Seas 3 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$