FZUS52 KCHS 200613 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 213 AM EDT Wed May 20 2026 South Santee River SC to Altamaha Sound GA out 60 NM, including Charleston Harbor and Grays Reef National Marine Sanctuary AMZ300-202015- 213 AM EDT Wed May 20 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. $$ AMZ340-202015- Charleston Harbor- 213 AM EDT Wed May 20 2026 .REST OF TONIGHT...Variable winds less than 5 kt. .WED...E winds 5 kt, becoming SE 10 to 15 kt in the afternoon. Patchy fog in the morning. .WED NIGHT...SE winds 10 to 15 kt, becoming S 5 kt after midnight. .THU...S winds 5 kt, increasing to 5 to 10 kt in the afternoon. .THU NIGHT...S winds 5 to 10 kt, diminishing to 5 kt after midnight. .FRI...S winds 5 kt, becoming SE in the afternoon. A slight chance of showers. .FRI NIGHT...S winds 5 to 10 kt. A slight chance of showers after midnight. .SAT...S winds 5 to 10 kt. A chance of showers with a slight chance of tstms. .SAT NIGHT...S winds 5 to 10 kt. .SUN...S winds 5 to 10 kt. A chance of showers with a slight chance of tstms. .SUN NIGHT...S winds 5 to 10 kt. A slight chance of showers. Winds and waves higher in and near tstms. $$ AMZ360-202015- Coastal waters from South Santee River to Edisto Beach SC out 20 NM- 213 AM EDT Wed May 20 2026 .REST OF TONIGHT...Variable winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. .WED...NE winds 5 kt, becoming SE in the afternoon. Seas 2 to 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 kt, increasing to 5 to 10 kt in the afternoon. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .THU NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds. A slight chance of showers and tstms after midnight. .FRI...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds. A slight chance of showers. .FRI NIGHT...S winds 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. .SUN...S winds 5 to 10 kt. Seas 3 ft. A slight chance of showers and tstms. .SUN NIGHT...S winds 5 to 10 kt. Seas 3 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$ AMZ362-202015- Coastal waters from Edisto Beach SC to Savannah GA out 20 NM- 213 AM EDT Wed May 20 2026 .REST OF TONIGHT...E winds 5 kt, becoming variable. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds. .WED...NE winds 5 kt, becoming E in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. .THU...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds. .THU NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .FRI...SE winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. .FRI NIGHT...SE winds 10 kt. Seas 3 to 4 ft. A slight chance of showers after midnight. .SAT...SE winds 5 to 10 kt. Seas 3 to 4 ft. .SAT NIGHT...SE winds 5 to 10 kt. Seas 3 ft. .SUN...SE winds 5 to 10 kt. Seas 3 ft. .SUN NIGHT...SE winds 10 kt. Seas 3 ft. $$ AMZ364-202015- Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary- 213 AM EDT Wed May 20 2026 .REST OF TONIGHT...E winds 5 kt, becoming variable. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .WED...NE winds 5 kt, becoming E in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 9 seconds. .WED NIGHT...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...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 NIGHT...SE winds 5 to 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. A slight chance of showers after midnight. .SAT...SE winds 5 to 10 kt. Seas 3 ft. .SAT NIGHT...SE winds 10 kt. Seas 3 ft. .SUN...SE winds 10 to 15 kt. Seas 3 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 3 ft. $$ AMZ380-202015- Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM- 213 AM EDT Wed May 20 2026 .REST OF TONIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds. .WED...E winds 5 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds. A slight chance of showers in the afternoon. .WED NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds. A slight chance of showers after midnight. .THU...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A slight chance of tstms in the morning. A slight chance of showers. .THU NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A slight chance of showers in the evening, then a chance of showers with a slight chance of tstms after midnight. .FRI...S winds 5 to 10 kt. Seas 4 ft. Wave Detail: SE 4 ft at 9 seconds. A chance of showers with a slight chance of tstms. .FRI NIGHT...S winds 10 to 15 kt. Seas 4 ft. A slight chance of tstms. A slight chance of showers in the evening, then a chance of showers after midnight. .SAT...S winds 10 kt. Seas 4 ft. A chance of showers with a slight chance of tstms. .SAT NIGHT...S winds 10 to 15 kt. Seas 4 ft. A slight chance of showers and tstms. .SUN...S winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ382-202015- Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM- 213 AM EDT Wed May 20 2026 .REST OF TONIGHT...SE winds 5 to 10 kt, becoming E late. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds. .WED...E winds 5 kt. 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 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. .THU NIGHT...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 after midnight. .FRI...S winds 5 to 10 kt. Seas 4 ft. Wave Detail: SE 4 ft at 9 seconds. A chance of showers. .FRI NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Seas 4 to 5 ft. A slight chance of showers after midnight. .SAT...S winds 5 to 10 kt. Seas 4 to 5 ft. A slight chance of showers. .SAT NIGHT...SE winds 10 kt. Seas 3 to 4 ft. A slight chance of showers and tstms. .SUN...S 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 and tstms. Winds and seas higher in and near tstms. $$ AMZ384-202015- Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM- 213 AM EDT Wed May 20 2026 .REST OF TONIGHT...E winds 5 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .WED...E winds 5 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .THU...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 9 seconds. .THU NIGHT...S winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and E 1 foot at 9 seconds. .FRI...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and E 1 foot at 9 seconds. A slight chance of showers in the morning. .FRI NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. .SAT...SE winds 5 to 10 kt. Seas 3 to 4 ft. .SAT NIGHT...SE winds 10 kt. Seas 3 to 4 ft. .SUN...SE winds 5 to 10 kt. Seas 3 to 4 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. $$