FZUS52 KCHS 190913 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 513 AM 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 AMZ300-192315- 513 AM 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. $$ AMZ340-192315- Charleston Harbor- 513 AM EDT Tue May 19 2026 .TODAY...Variable winds less than 5 kt, becoming SE 10 to 15 kt. .TONIGHT...SE winds 5 to 10 kt, becoming S after midnight. .WED...E winds 5 kt, becoming SE in the afternoon. .WED NIGHT...S winds 5 to 10 kt, diminishing to 5 kt after midnight. .THU...S winds 5 kt, increasing to 5 to 10 kt in the afternoon. .THU NIGHT...S winds 5 to 10 kt, diminishing to 5 kt after midnight. A slight chance of showers and tstms after midnight. .FRI...SE winds 5 to 10 kt. A chance of showers with a slight chance of tstms. .FRI NIGHT...SE winds 5 to 10 kt. .SAT...S winds 5 to 10 kt. A slight chance of showers and tstms. .SAT NIGHT...S winds 5 to 10 kt. A slight chance of showers. Winds and waves higher in and near tstms. $$ AMZ360-192315- Coastal waters from South Santee River to Edisto Beach SC out 20 NM- 513 AM EDT Tue May 19 2026 .TODAY...SE winds 5 kt, becoming E this afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. .TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. .WED...E 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...SW winds 5 kt, becoming S in the afternoon. 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. A slight chance of showers and tstms. .FRI NIGHT...SE winds 10 kt. Seas 3 to 4 ft. .SAT...S winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers and tstms. .SAT NIGHT...S winds 10 kt. Seas 3 to 4 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$ AMZ362-192315- Coastal waters from Edisto Beach SC to Savannah GA out 20 NM- 513 AM EDT Tue May 19 2026 .TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. .TONIGHT...SE winds 5 to 10 kt, diminishing to 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. .WED...NE winds 5 kt, becoming E in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .THU...S winds 5 kt, becoming SE in the afternoon. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .THU NIGHT...SE winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .FRI...SE winds 5 to 10 kt. Seas 3 ft. A slight chance of showers and tstms. .FRI NIGHT...SE winds 10 kt. Seas 3 to 4 ft. .SAT...S winds 5 to 10 kt. Seas 3 to 4 ft. .SAT NIGHT...S winds 10 kt. Seas 3 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$ AMZ364-192315- Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary- 513 AM EDT Tue May 19 2026 .TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .TONIGHT...E winds 10 kt, becoming SE 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 3 ft at 9 seconds and E 1 foot at 9 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .THU...SE winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 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...SE winds 10 to 15 kt. Seas 3 ft. .FRI NIGHT...SE winds 10 to 15 kt. Seas 3 ft. .SAT...SE winds 10 to 15 kt. Seas 3 ft. .SAT NIGHT...S winds 10 to 15 kt. Seas 3 ft. $$ AMZ380-192315- Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM- 513 AM EDT Tue May 19 2026 .TODAY...SE winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .TONIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds. .WED...SE winds 5 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A slight chance of showers after midnight. .THU...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A slight chance of tstms in the morning. A slight chance of showers. .THU NIGHT...S winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A slight chance of showers in the evening, then a chance of showers and tstms after midnight. .FRI...SE winds 5 to 10 kt. Seas 4 ft. A chance of showers with a slight chance of tstms. .FRI NIGHT...SE winds 10 to 15 kt. Seas 4 ft. A chance of showers with a slight chance of tstms. .SAT...S winds 10 kt. Seas 4 ft. A chance of showers with a slight chance of tstms. .SAT NIGHT...S winds 10 to 15 kt. Seas 4 ft. A chance of showers with a slight chance of tstms. Winds and seas higher in and near tstms. $$ AMZ382-192315- Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM- 513 AM EDT Tue May 19 2026 .TODAY...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. .TONIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. .WED...E 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 4 ft at 8 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...SE 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. A chance of showers with a slight chance of tstms. .FRI NIGHT...SE winds 10 to 15 kt. Seas 4 to 5 ft. A slight chance of showers and tstms. .SAT...S winds 10 kt. Seas 4 ft. A slight chance of showers. .SAT NIGHT...S winds 10 to 15 kt. Seas 4 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ384-192315- Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM- 513 AM EDT Tue May 19 2026 .TODAY...E winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .TONIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .WED...E winds 5 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .THU...S winds 5 kt, becoming SE in the afternoon. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .THU NIGHT...SE winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and E 1 foot at 9 seconds. A slight chance of showers and tstms after midnight. .FRI...SE winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers and tstms. .FRI NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. .SAT...S winds 5 to 10 kt. Seas 3 to 4 ft. .SAT NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$