FZUS52 KCHS 082139 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 539 PM EDT Wed Jul 8 2026 South Santee River SC to Altamaha Sound GA out 60 NM, including Charleston Harbor and Grays Reef National Marine Sanctuary AMZ300-091100- 539 PM EDT Wed Jul 8 2026 .Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... High pressure will persist over the region through this week. $$ AMZ340-091100- Charleston Harbor- 539 PM EDT Wed Jul 8 2026 .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. .THU...W winds 10 kt, becoming SW with gusts to 20 kt in the afternoon. .THU NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. .FRI...SW winds 10 to 15 kt. .FRI NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. .SAT...SW winds 10 to 15 kt. A slight chance of showers and tstms in the afternoon. .SAT NIGHT...SW winds 10 to 15 kt with gusts to 20 kt, diminishing to 5 to 10 kt after midnight. A chance of showers and tstms. .SUN...W winds 5 to 10 kt. Showers and tstms likely. .SUN NIGHT...SW winds 5 to 10 kt. Showers likely with a chance of tstms. .MON...N winds 5 to 10 kt. Showers and tstms likely. .MON NIGHT...NE winds 5 to 10 kt. Showers likely with a chance of tstms. Winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston Harbor water temperature 87 degrees. $$ AMZ360-091100- Coastal waters from South Santee River to Edisto Beach SC out 20 NM- 539 PM EDT Wed Jul 8 2026 .TONIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 9 seconds. .THU...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 9 seconds. .THU NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 9 seconds. .FRI...SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft, building to 4 to 5 ft in the afternoon. Wave Detail: S 4 ft at 6 seconds and SE 2 ft at 9 seconds, becoming S 4 ft at 7 seconds. .FRI NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 5 seconds and SE 2 ft at 9 seconds. A slight chance of showers and tstms in the evening. .SAT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the afternoon. Wave Detail: S 4 ft at 7 seconds. A slight chance of showers and tstms in the afternoon. .SAT NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight. A chance of showers and tstms. .SUN...SW winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely with a chance of tstms. .SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .MON...N winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .MON NIGHT...NE 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. $$ AMZ362-091100- Coastal waters from Edisto Beach SC to Savannah GA out 20 NM- 539 PM EDT Wed Jul 8 2026 .TONIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 9 seconds. .THU...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: S 3 ft at 5 seconds and SE 2 ft at 9 seconds. .THU NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 5 seconds and SE 2 ft at 9 seconds. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: S 3 ft at 6 seconds and SE 2 ft at 9 seconds. .FRI NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 5 seconds and SE 2 ft at 8 seconds. .SAT...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: S 3 ft at 7 seconds. .SAT NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 3 to 4 ft. A chance of showers and tstms. .SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. .SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .MON...W winds 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .MON NIGHT...E winds 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Winds and seas higher in and near tstms. $$ AMZ364-091100- Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary- 539 PM EDT Wed Jul 8 2026 .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt, becoming SW 10 to 15 kt late. Seas 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 9 seconds. .THU...W winds 10 to 15 kt, becoming S with gusts to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 3 ft at 9 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 5 seconds and SE 2 ft at 9 seconds. .FRI...W winds 10 to 15 kt, becoming S 15 to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and SE 2 ft at 9 seconds. .FRI NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 5 seconds and SE 1 foot at 8 seconds. .SAT...W winds 10 kt, becoming S with gusts to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 3 ft at 8 seconds. .SAT NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after midnight. Seas 3 to 4 ft, subsiding to 2 to 3 ft after midnight. A slight chance of showers and tstms. .SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. .SUN NIGHT...SW winds 10 kt. Seas 2 ft. Showers likely with a chance of tstms. .MON...W winds 5 to 10 kt. Seas 2 ft. Showers and tstms likely. .MON NIGHT...W winds 5 to 10 kt. Seas 2 ft. Showers likely with a chance of tstms. Winds and seas higher in and near tstms. $$ AMZ380-091100- Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM- 539 PM EDT Wed Jul 8 2026 .TONIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 9 seconds. .THU...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. Wave Detail: SW 4 ft at 6 seconds and SE 2 ft at 9 seconds. .THU NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft, building to 5 to 6 ft after midnight. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 9 seconds, becoming SW 5 ft at 6 seconds and SE 2 ft at 9 seconds. .FRI...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. Wave Detail: SW 5 ft at 6 seconds and SE 3 ft at 8 seconds. .FRI NIGHT...SW winds 20 kt with gusts to 25 kt. Seas 5 to 6 ft. Wave Detail: SW 5 ft at 5 seconds and SE 2 ft at 8 seconds. .SAT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft, subsiding to 4 to 5 ft in the afternoon. Wave Detail: S 5 ft at 7 seconds, becoming S 4 ft at 7 seconds. .SAT NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. A chance of showers and tstms. .SUN...W winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. .SUN NIGHT...W winds 10 to 15 kt. Seas 3 ft. Showers with a chance of tstms. .MON...NW winds 10 to 15 kt. Seas 3 ft. Showers likely with a chance of tstms. .MON NIGHT...NE winds 10 to 15 kt. Seas 3 ft. Showers likely with a chance of tstms. Winds and seas higher in and near tstms. $$ AMZ382-091100- Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM- 539 PM EDT Wed Jul 8 2026 .TONIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 9 seconds. .THU...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 9 seconds. .THU NIGHT...SW winds 15 to 20 kt with gusts to 30 kt. Seas 4 to 5 ft. Wave Detail: SW 5 ft at 6 seconds and SE 2 ft at 9 seconds. .FRI...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the afternoon. Wave Detail: S 4 ft at 7 seconds, becoming SW 3 ft at 5 seconds and SE 2 ft at 8 seconds. .FRI NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. Wave Detail: SW 5 ft at 5 seconds and SE 3 ft at 9 seconds. .SAT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the afternoon. Wave Detail: S 4 ft at 7 seconds, becoming SW 3 ft at 5 seconds and SE 2 ft at 8 seconds. .SAT NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft. A chance of showers and tstms. .SUN...W winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. .SUN NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Showers likely with a chance of tstms. .MON...W winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .MON 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. $$ AMZ384-091100- Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM- 539 PM EDT Wed Jul 8 2026 .TONIGHT...SW winds 15 kt. Gusts to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. .THU...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 3 ft at 9 seconds. .THU NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 5 seconds and SE 3 ft at 9 seconds. .FRI...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 7 seconds. .FRI NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 5 seconds and SE 2 ft at 8 seconds. .SAT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 5 seconds and SE 3 ft at 8 seconds. .SAT NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. A slight chance of showers and tstms. .SUN...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. .SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .MON...W winds 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Winds and seas higher in and near tstms. $$