FZUS52 KCHS 292309 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 709 PM EDT Tue Apr 29 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 AMZ300-301215- 709 PM EDT Tue Apr 29 2025 .Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... High pressure will prevail through the end of the week. A cold front will move through Saturday, followed by high pressure building into the region again early next week. $$ AMZ330-301215- Charleston Harbor- 709 PM EDT Tue Apr 29 2025 .TONIGHT...S winds 5 to 10 kt. .WED...SW winds 5 kt, becoming S 10 to 15 kt in the afternoon. .WED NIGHT...S winds 10 to 15 kt, diminishing to 5 kt after midnight. .THU...S winds 5 to 10 kt. .THU NIGHT...S winds 5 to 10 kt. .FRI...S winds 10 kt. .FRI NIGHT...S winds 10 kt. A slight chance of showers in the evening, then a chance of showers after midnight. .SAT...SW winds 10 kt. A chance of showers and tstms. .SAT NIGHT...W winds 5 to 10 kt. A chance of showers and tstms. .SUN...NE winds 10 kt. A chance of showers. .SUN NIGHT...NE winds 10 kt. Winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston Harbor water temperature 74 degrees. $$ AMZ350-301215- Waters from South Santee River to Edisto Beach SC out 20 NM- 709 PM EDT Tue Apr 29 2025 .TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds. .WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds. .WED NIGHT...S winds 10 to 15 kt, becoming SW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. .THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. .THU NIGHT...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 2 ft at 8 seconds. .FRI...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: S 3 ft at 5 seconds and E 2 ft at 8 seconds. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers in the evening, then a chance of showers after midnight. .SAT...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. .SAT NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .SUN...NE winds 10 to 15 kt. Seas 4 to 5 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$ AMZ352-301215- Waters from Edisto Beach SC to Savannah GA out 20 NM- 709 PM EDT Tue Apr 29 2025 .TONIGHT...SE winds 5 to 10 kt, becoming S late. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds. .WED...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds. .THU...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds. .THU NIGHT...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. .FRI...S winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 5 seconds. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers in the evening, then a chance of showers after midnight. .SAT...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms. .SAT NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .SUN...NE winds 10 to 15 kt. Seas 4 to 5 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$ AMZ354-301215- Waters from Savannah GA to Altamaha Sound GA out 20 NM, including Grays Reef National Marine Sanctuary- 709 PM EDT Tue Apr 29 2025 .TONIGHT...SE winds 10 kt, becoming S late. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds. .WED...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 7 seconds. .WED NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds. .THU...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds. .THU NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 4 seconds, becoming S 2 ft at 4 seconds and E 2 ft at 8 seconds. .FRI...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 5 seconds. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers in the evening, then a chance of showers after midnight. .SAT...S winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms. .SAT NIGHT...SW winds 10 kt. Seas 3 to 4 ft. A chance of showers and tstms. .SUN...NE winds 10 to 15 kt. Seas 4 to 5 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$ AMZ374-301215- Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM- 709 PM EDT Tue Apr 29 2025 .TONIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds. .WED...S winds 5 kt. Seas 3 ft. Wave Detail: E 3 ft at 8 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft at 8 seconds. .THU...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft at 8 seconds. .THU NIGHT...S winds 10 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 5 seconds and SE 3 ft at 8 seconds. .FRI...S winds 10 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 5 seconds and E 3 ft at 8 seconds. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers in the evening, then a chance of showers after midnight. .SAT...SW winds 10 to 15 kt. Seas 4 ft. A chance of showers with a slight chance of tstms. .SAT NIGHT...SW winds 10 kt. Seas 3 to 4 ft. Showers likely with a chance of tstms. .SUN...NE winds 10 to 15 kt. Seas 4 to 6 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. A chance of showers. Winds and seas higher in and near tstms. $$