FZUS52 KCHS 220939 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 539 AM EDT Sat Aug 22 2026 South Santee River SC to Altamaha Sound GA out 60 NM, including Charleston Harbor and Grays Reef National Marine Sanctuary AMZ300-222300- 539 AM EDT Sat Aug 22 2026 .Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... Typical summertime conditions will persist across the local waters through the weekend and into next week. $$ AMZ340-222300- Charleston Harbor- 539 AM EDT Sat Aug 22 2026 .TODAY...W winds 5 to 10 kt, becoming SW late. A chance of showers and tstms early this morning. A chance of showers and tstms this afternoon. .TONIGHT...SW winds 5 to 10 kt. A chance of showers and tstms, mainly in the evening. .SUN...SW winds 5 to 10 kt. .SUN NIGHT...SW winds 5 to 10 kt. .MON...SW winds 5 to 10 kt. A chance of showers with a slight chance of tstms in the afternoon. .MON NIGHT...SW winds 5 to 10 kt. A slight chance of tstms. A chance of showers, mainly in the evening. .TUE...SW winds 5 to 10 kt. A chance of showers and tstms. .TUE NIGHT...SW winds 5 to 10 kt. A chance of showers and tstms. .WED...SW winds 5 to 10 kt. Showers likely with a chance of tstms. .WED NIGHT...SW winds 5 to 10 kt. A chance of showers and tstms. Winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston Harbor water temperature 87 degrees. $$ AMZ360-222300- Coastal waters from South Santee River to Edisto Beach SC out 20 NM- 539 AM EDT Sat Aug 22 2026 .TODAY...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers and tstms early this morning, then a slight chance of showers and tstms late this morning and early afternoon. A chance of showers and tstms late. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 9 seconds. A chance of showers and tstms. .SUN...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 9 seconds. A slight chance of showers and tstms in the morning. .SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers with a slight chance of tstms. .MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms in the afternoon. .MON NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at 12 seconds. A slight chance of showers and tstms. .TUE...SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. .TUE NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Showers likely with a chance of tstms. .WED...SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. .WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Winds and seas higher in and near tstms. $$ AMZ362-222300- Coastal waters from Edisto Beach SC to Savannah GA out 20 NM- 539 AM EDT Sat Aug 22 2026 .TODAY...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms early this morning. A slight chance of showers and tstms early this afternoon, then a chance of showers and tstms late. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of showers and tstms, mainly in the evening. .SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 9 seconds. .SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms in the evening. .MON...W winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 8 seconds. .MON NIGHT...SW winds 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms. .TUE...SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. .TUE NIGHT...SW winds 10 kt. Seas 2 ft. A chance of showers and tstms. .WED...SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. .WED NIGHT...S winds 10 to 15 kt. Seas 2 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ364-222300- Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary- 539 AM EDT Sat Aug 22 2026 .TODAY...SW winds 10 to 15 kt, becoming S late. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms early this afternoon. A chance of showers and tstms late. .TONIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of showers and tstms in the evening. .SUN...W winds 10 to 15 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and E 1 foot at 8 seconds. .MON...W winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 8 seconds. .MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms. .TUE...SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. .WED...SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. .WED NIGHT...S winds 10 to 15 kt. Seas 2 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ380-222300- Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM- 539 AM EDT Sat Aug 22 2026 .TODAY...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 9 seconds. Showers and tstms likely early this morning, then a chance of showers and tstms late this morning. A slight chance of showers and tstms this afternoon. .TONIGHT...SW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 1 foot at 9 seconds. A chance of showers and tstms in the evening, then showers likely with a chance of tstms after midnight. .SUN...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 1 foot at 9 seconds. A chance of showers and tstms in the morning. .SUN NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers. A slight chance of tstms in the evening, then a chance of tstms after midnight. .MON...SW winds 10 kt. Seas 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers and tstms, mainly in the morning. .MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at 12 seconds. A slight chance of showers and tstms. .TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .TUE NIGHT...SW winds 10 kt. Seas 2 ft. Showers and tstms likely. .WED...SW winds 10 kt. Seas 2 ft. A chance of showers and tstms. .WED NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Winds and seas higher in and near tstms. $$ AMZ382-222300- Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM- 539 AM EDT Sat Aug 22 2026 .TODAY...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers and tstms early this morning, then a slight chance of showers and tstms late this morning. .TONIGHT...SW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of showers and tstms. .SUN...SW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of tstms with a slight chance of showers in the morning. .SUN NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 9 seconds. A slight chance of showers and tstms. .MON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms in the morning. .MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and SE 2 ft at 11 seconds. A slight chance of showers and tstms. .TUE...SW winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .TUE NIGHT...SW winds 10 kt. Seas 2 to 3 ft. Tstms likely with a chance of showers. .WED...SW winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .WED NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ384-222300- Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM- 539 AM EDT Sat Aug 22 2026 .TODAY...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms early this morning. A slight chance of showers and tstms late. .TONIGHT...SW winds 15 kt with gusts to 20 kt. Seas 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of showers and tstms, mainly in the evening. .SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and E 1 foot at 8 seconds. .MON...W winds 10 to 15 kt, becoming SW 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 8 seconds. .MON NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and SE 2 ft at 12 seconds. A slight chance of showers and tstms. .TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. .TUE NIGHT...S winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .WED NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$