FZUS52 KCHS 181814 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 214 PM EDT Mon May 18 2026 South Santee River SC to Altamaha Sound GA out 60 NM, including Charleston Harbor and Grays Reef National Marine Sanctuary AMZ300-190800- 214 PM EDT Mon May 18 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. $$ AMZ340-190800- Charleston Harbor- 214 PM EDT Mon May 18 2026 .THIS AFTERNOON...SE winds 10 kt. .TONIGHT...SE winds 5 to 10 kt, diminishing to 5 kt after midnight. .TUE...E winds 5 kt, becoming SE in the afternoon. .TUE NIGHT...SE winds 5 to 10 kt, becoming S after midnight. .WED...SE winds 5 kt, increasing to 5 to 10 kt in the afternoon. .WED NIGHT...S winds 5 to 10 kt. .THU...S winds 5 to 10 kt. .THU NIGHT...S winds 5 to 10 kt. A slight chance of showers. .FRI...SE winds 5 to 10 kt. A chance of showers with a slight chance of tstms. .FRI NIGHT...SE winds 5 to 10 kt. A slight chance of showers and tstms. Winds and waves higher in and near tstms. $$ AMZ360-190800- Coastal waters from South Santee River to Edisto Beach SC out 20 NM- 214 PM EDT Mon May 18 2026 .THIS AFTERNOON...SE 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. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .TUE...E winds 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .TUE NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas 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...S winds 5 to 10 kt. Seas 3 ft. .THU NIGHT...SE winds 5 to 10 kt. Seas 3 ft. A slight chance of showers and tstms. .FRI...SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms. .FRI NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms. Winds and seas higher in and near tstms. $$ AMZ362-190800- Coastal waters from Edisto Beach SC to Savannah GA out 20 NM- 214 PM EDT Mon May 18 2026 .THIS AFTERNOON...E winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .TONIGHT...SE winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .TUE...E winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .TUE NIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .WED...E winds 5 kt, becoming SE in the afternoon. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .THU...S winds 5 to 10 kt. Seas 3 ft. .THU NIGHT...SE winds 5 to 10 kt. Seas 3 ft. .FRI...SE winds 5 to 10 kt. Seas 3 ft. .FRI NIGHT...SE winds 5 to 10 kt. Seas 3 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ364-190800- Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary- 214 PM EDT Mon May 18 2026 .THIS AFTERNOON...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...SE 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. .TUE...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. .TUE NIGHT...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 8 seconds. .WED...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE3 ft at 8 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 2 to 3 ft. .THU NIGHT...SE winds 5 to 10 kt. Seas 3 ft. .FRI...SE winds 5 to 10 kt. Seas 3 ft. .FRI NIGHT...SE winds 10 kt. Seas 3 ft. $$ AMZ380-190800- Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM- 214 PM EDT Mon May 18 2026 .THIS AFTERNOON...SE winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .TONIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds. .TUE...SE winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. .TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds. A slight chance of showers after midnight. .WED...SE winds 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds. A slight chance of showers in the morning. .WED NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A slight chance of showers after midnight. .THU...S winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms. .THU NIGHT...SE winds 10 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms. .FRI...SE winds 5 to 10 kt. Seas 4 ft. A chance of showers with a slight chance of tstms. .FRI NIGHT...SE winds 10 to 15 kt. Seas 4 ft. A chance of showers with a slight chance of tstms. Winds and seas higher in and near tstms. $$ AMZ382-190800- Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM- 214 PM EDT Mon May 18 2026 .THIS AFTERNOON...E winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds. .TONIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds. .TUE...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds. .TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. .WED...E winds 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SE 3 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. .THU...S winds 5 to 10 kt. Seas 3 to 4 ft. .THU NIGHT...SE winds 10 kt. Seas 3 to 4 ft. A slight chance of showers and tstms. .FRI...SE winds 5 to 10 kt. Seas 3 to 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. Winds and seas higher in and near tstms. $$ AMZ384-190800- Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM- 214 PM EDT Mon May 18 2026 .THIS AFTERNOON...E winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .TONIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .TUE...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .WED...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .THU...SE winds 5 to 10 kt. Seas 3 to 4 ft. .THU NIGHT...SE winds 10 kt. Seas 3 to 4 ft. .FRI...SE winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers. .FRI NIGHT...SE winds 10 kt. Seas 3 to 4 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$