FZUS52 KCHS 221820 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 219 PM 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 AMZ300-230800- 219 PM 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. $$ AMZ340-230800- Charleston Harbor- 219 PM EDT Sat Aug 22 2026 .THIS AFTERNOON...SW winds 10 kt. A slight chance of showers and tstms early, then showers and tstms likely late. .TONIGHT...SW winds 5 to 10 kt. A chance of showers and tstms, mainly in the evening. .SUN...W winds 5 to 10 kt, becoming SW 10 to 15 kt in the afternoon. A slight chance of showers and tstms in the afternoon. .SUN NIGHT...SW winds 5 to 10 kt. A slight chance of tstms. A slight chance of showers in the evening, then a chance of showers after midnight. .MON...SW winds 5 to 10 kt. A chance of showers and tstms in the afternoon. .MON NIGHT...SW winds 5 to 10 kt. A chance of showers and tstms, mainly in the evening. .TUE...SW winds 5 to 10 kt. A chance of showers and tstms. .TUE NIGHT...SW winds 5 to 10 kt. Showers likely with a chance of tstms. .WED...SW winds 5 to 10 kt. A chance of showers and tstms. .WED NIGHT...S winds 5 to 10 kt. Showers likely with a chance of tstms. Winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston Harbor water temperature 88 degrees. $$ AMZ360-230800- Coastal waters from South Santee River to Edisto Beach SC out 20 NM- 219 PM EDT Sat Aug 22 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 9 seconds. A slight chance of showers and tstms early, then 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. Seas 2 to 3 ft. Wave Detail: SW 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 with gusts to 20 kt. Seas 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms after midnight. .MON...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 in the afternoon. .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 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 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of 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. $$ AMZ362-230800- Coastal waters from Edisto Beach SC to Savannah GA out 20 NM- 219 PM EDT Sat Aug 22 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 8 seconds. A chance of tstms with a slight chance of showers late. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of tstms. A chance of showers. .SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 9 seconds. .SUN NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms after midnight. .MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms in the afternoon. .MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms. .TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .TUE NIGHT...SW winds 10 to 15 kt. Seas 2 ft. Showers likely with a chance of tstms. .WED...SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. .WED NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Winds and seas higher in and near tstms. $$ AMZ364-230800- Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary- 219 PM EDT Sat Aug 22 2026 .THIS AFTERNOON...S winds 5 to 10 kt, increasing to 10 to 15 kt late. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms early, then 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. .SUN...W winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and E 1 foot at 8 seconds. .MON...SW 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. A chance of showers with a slight chance of tstms in the afternoon. .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 chance of showers with a slight chance of tstms. .TUE...SW winds 10 to 15 kt. Seas 2 ft. A chance of showers and tstms. .TUE NIGHT...SW winds 10 to 15 kt. Seas 2 ft. A chance of showers and tstms. .WED...SW winds 10 to 15 kt. Seas 2 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. $$ AMZ380-230800- Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM- 219 PM EDT Sat Aug 22 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 9 seconds. A slight chance of showers and tstms late. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 9 seconds. A chance of tstms. A chance of showers in the evening, then showers likely after midnight. .SUN...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 9 seconds. A chance of showers and tstms in the morning. .SUN NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers and tstms after midnight. .MON...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms. .MON NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 12 seconds. A chance of showers. A slight chance of tstms in the evening, then a chance of tstms after midnight. .TUE...SW winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Showers and tstms likely. .WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .WED NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Winds and seas higher in and near tstms. $$ AMZ382-230800- Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM- 219 PM EDT Sat Aug 22 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. .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, becoming SW 3 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers and tstms 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 8 seconds. A slight chance of showers and tstms after midnight. .MON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and NE 1 foot at 8 seconds. .MON 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 12 seconds. A chance of showers. A slight chance of tstms in the evening, then a chance of tstms after midnight. .TUE...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. .TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of 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. $$ AMZ384-230800- Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM- 219 PM EDT Sat Aug 22 2026 .THIS AFTERNOON...SW winds 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms late. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of showers and tstms. .SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. A slight chance of showers and tstms in the morning. .SUN NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and E 1 foot at 8 seconds. .MON...SW winds 10 to 15 kt with gusts to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers in the afternoon. .MON NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 2 ft at 12 seconds. A chance of showers with a slight chance of tstms. .TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. .WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. .WED NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$