FZUS52 KCHS 192139 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 539 PM EDT Tue May 19 2026 South Santee River SC to Altamaha Sound GA out 60 NM, including Charleston Harbor and Grays Reef National Marine Sanctuary AMZ300-201100- 539 PM EDT Tue May 19 2026 .Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... High pressure will extend across the region before a cold front approaches the area near the end of the week. $$ AMZ340-201100- Charleston Harbor- 539 PM EDT Tue May 19 2026 .TONIGHT...SE winds 5 to 10 kt until early morning, becoming light and variable. .WED...W winds 5 kt, becoming SE in the afternoon. .WED NIGHT...S winds 5 to 10 kt. .THU...SW winds 5 kt, becoming S in the afternoon. .THU NIGHT...S winds 5 to 10 kt. A slight chance of showers after midnight. .FRI...SE winds 5 to 10 kt. A slight chance of showers. A slight chance of tstms in the afternoon. .FRI NIGHT...SE winds 5 to 10 kt. A slight chance of showers after midnight. .SAT...S winds 5 to 10 kt. A slight chance of showers. .SAT NIGHT...S winds 5 to 10 kt. A slight chance of showers. .SUN...S winds 5 to 10 kt. A chance of showers with a slight chance of tstms. .SUN NIGHT...S winds 5 to 10 kt. A slight chance of showers. Winds and waves higher in and near tstms. $$ AMZ360-201100- Coastal waters from South Santee River to Edisto Beach SC out 20 NM- 539 PM EDT Tue May 19 2026 .TONIGHT...SE winds 5 to 10 kt, becoming S late. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .WED...N winds 5 kt, becoming SE in the afternoon. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .THU...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .THU NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. A chance of showers with a slight chance of tstms after midnight. .FRI...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds. A chance of showers. A slight chance of tstms in the morning, then a chance of tstms in the afternoon. .FRI NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers after midnight. .SAT...S winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers. .SAT NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms. .SUN...S winds 5 to 10 kt. Seas 3 ft. A chance of showers. .SUN NIGHT...S winds 5 to 10 kt. Seas 3 ft. A chance of showers with a slight chance of tstms. Winds and seas higher in and near tstms. $$ AMZ362-201100- Coastal waters from Edisto Beach SC to Savannah GA out 20 NM- 539 PM EDT Tue May 19 2026 .TONIGHT...SE winds 5 to 10 kt, becoming S late. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .WED...NE winds 5 kt, becoming E in the afternoon. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .THU...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .THU NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .FRI...SE winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .FRI NIGHT...SE winds 10 kt. Seas 3 to 4 ft. .SAT...SE winds 5 to 10 kt. Seas 3 to 4 ft. .SAT NIGHT...SE winds 5 to 10 kt. Seas 3 ft. A slight chance of showers. .SUN...S winds 5 to 10 kt. Seas 3 ft. A slight chance of showers. .SUN NIGHT...S winds 5 to 10 kt. Seas 3 ft. A slight chance of showers. $$ AMZ364-201100- Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary- 539 PM EDT Tue May 19 2026 .TONIGHT...SE winds 10 kt, diminishing to 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .WED...E winds 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and E 1 foot at 9 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .THU...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .THU NIGHT...SE winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .FRI...S winds 5 to 10 kt, becoming SE 10 to 15 kt in the afternoon. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .FRI NIGHT...SE winds 10 to 15 kt. Seas 3 ft. .SAT...SE winds 10 to 15 kt. Seas 3 ft. .SAT NIGHT...SE winds 10 to 15 kt. Seas 3 ft. .SUN...SE winds 10 to 15 kt. Seas 3 ft. A slight chance of showers. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 ft. A slight chance of showers. $$ AMZ380-201100- Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM- 539 PM EDT Tue May 19 2026 .TONIGHT...SE winds 5 to 10 kt, becoming S late. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds. .WED...E winds 5 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A slight chance of showers and tstms after midnight. .THU...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A chance of showers with a slight chance of tstms in the morning, then a slight chance of showers in the afternoon. .THU NIGHT...S winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A slight chance of showers in the evening, then showers likely with a slight chance of tstms after midnight. .FRI...S winds 5 to 10 kt. Seas 4 ft. Wave Detail: SE 4 ft at 9 seconds. Showers likely with a chance of tstms in the morning, then a chance of showers with a slight chance of tstms in the afternoon. .FRI NIGHT...SE winds 10 to 15 kt. Seas 4 ft. A slight chance of tstms. A slight chance of showers in the evening, then a chance of showers after midnight. .SAT...S winds 10 kt. Seas 4 ft. A chance of showers. .SAT NIGHT...S winds 10 to 15 kt. Seas 4 ft. A chance of showers with a slight chance of tstms. .SUN...S winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms. Winds and seas higher in and near tstms. $$ AMZ382-201100- Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM- 539 PM EDT Tue May 19 2026 .TONIGHT...SE winds 5 to 10 kt, becoming S late. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. .WED...NE winds 5 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and E 2 ft at 9 seconds. .THU...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and E 2 ft at 9 seconds. A slight chance of showers in the morning. .THU NIGHT...S winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A chance of showers with a slight chance of tstms after midnight. .FRI...SE winds 5 to 10 kt. Seas 4 ft. Wave Detail: SE 4 ft at 9 seconds and E 1 foot at 9 seconds. A chance of showers. A chance of tstms, mainly in the morning. .FRI NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Seas 4 ft. A slight chance of showers and tstms. .SAT...SE winds 5 to 10 kt. Seas 4 ft. A slight chance of showers. .SAT NIGHT...SE winds 10 to 15 kt. Seas 4 ft. A slight chance of showers. .SUN...S winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ384-201100- Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM- 539 PM EDT Tue May 19 2026 .TONIGHT...SE winds 5 to 10 kt, diminishing to 5 kt late. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .WED...E winds 5 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .THU...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .THU NIGHT...SE winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and E 1 foot at 9 seconds. .FRI...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and E 1 foot at 9 seconds. A chance of showers with a slight chance of tstms. .FRI NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft. .SAT...SE winds 5 to 10 kt. Seas 3 to 4 ft. .SAT NIGHT...SE winds 10 kt. Seas 3 to 4 ft. .SUN...SE winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers. .SUN NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$