FZUS52 KCHS 150939 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 539 AM EDT Thu Oct 15 2026 South Santee River SC to Altamaha Sound GA out 60 NM, including Charleston Harbor and Grays Reef National Marine Sanctuary AMZ300-152300- 539 AM EDT Thu Oct 15 2026 .Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... High pressure will extend across the region this week. A strong cold front will push offshore Friday night into Saturday morning. Significant wind and sea conditions expected across the nearshore and outer Georgia and South Carolina waters this weekend into early next week. $$ AMZ340-152300- Charleston Harbor- 539 AM EDT Thu Oct 15 2026 .TODAY...SW winds 5 to 10 kt. .TONIGHT...SW winds 5 to 10 kt. .FRI...SW winds 5 to 10 kt. .FRI NIGHT...SW winds 10 to 15 kt. .SAT...N winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A slight chance of showers in the morning, then a chance of showers in the afternoon. .SAT NIGHT...N winds 20 kt with gusts to 30 kt. Waves 1 to 2 ft. A chance of showers in the evening. .SUN...NE winds 20 to 25 kt. Waves 2 to 3 ft. .SUN NIGHT...NE winds 15 to 20 kt. Waves 1 to 2 ft. .MON...NE winds 15 to 20 kt. Waves 1 to 2 ft. A slight chance of showers. .MON NIGHT...NE winds 10 to 15 kt. Unless otherwise noted, waves 1 foot or less. Charleston Harbor water temperature 77 degrees. $$ AMZ360-152300- Coastal waters from South Santee River to Edisto Beach SC out 20 NM- 539 AM EDT Thu Oct 15 2026 .TODAY...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at 2 seconds. .TONIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at 2 seconds. .FRI...W winds 5 to 10 kt, becoming SW 10 to 15 kt in the afternoon. Seas 2 ft. Wave Detail: S 2 ft at 3 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt after midnight. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 9 seconds, becoming SW 3 ft at 5 seconds and E 1 foot at 9 seconds. .SAT...NW winds 20 to 25 kt, becoming N 25 to 30 kt in the afternoon. Seas 4 to 5 ft. Wave Detail: N 5 ft at 5 seconds and E 3 ft at 9 seconds. A slight chance of showers in the morning, then a chance of showers in the afternoon. .SAT NIGHT...N winds 25 to 30 kt with gusts to 40 kt. Seas 5 to 7 ft, building to 6 to 8 ft after midnight. Wave Detail: N 7 ft at 5 seconds and W 1 foot at 5 seconds, becoming NE 8 ft at 7 seconds. A chance of showers, mainly in the evening. .SUN...NE winds 30 kt. Seas 7 to 9 ft. A slight chance of showers. .SUN NIGHT...NE winds 25 to 30 kt. Seas 8 to 10 ft. A slight chance of showers. .MON...NE winds 25 to 30 kt. Seas 8 to 10 ft. A chance of showers. .MON NIGHT...NE winds 20 to 25 kt. Seas 7 to 9 ft. A slight chance of showers. $$ AMZ362-152300- Coastal waters from Edisto Beach SC to Savannah GA out 20 NM- 539 AM EDT Thu Oct 15 2026 .TODAY...SW winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at 7 seconds. .TONIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds. .FRI...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds. .FRI NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. .SAT...N winds 20 to 25 kt with gusts to 30 kt. Seas 3 to 4 ft, building to 4 to 5 ft in the afternoon. Wave Detail: NW 4 ft at 4 seconds and E 1 foot at 9 seconds, becoming N 5 ft at 4 seconds and E 2 ft at 9 seconds. A chance of showers. .SAT NIGHT...N winds 25 to 30 kt with gusts to 40 kt. Seas 5 to 7 ft, building to 6 to 8 ft after midnight. Wave Detail: N 7 ft at 5 seconds, becoming NE 8 ft at 6 seconds.A chance of showers in the evening. .SUN...NE winds 30 kt. Seas 7 to 9 ft. A slight chance of showers. .SUN NIGHT...NE winds 25 to 30 kt. Seas 8 to 10 ft. A slight chance of showers. .MON...NE winds 25 to 30 kt. Seas 8 to 10 ft. A chance of showers. .MON NIGHT...NE winds 25 to 30 kt. Seas 7 to 9 ft. A slight chance of showers. $$ AMZ364-152300- Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary- 539 AM EDT Thu Oct 15 2026 .TODAY...SW winds 5 kt, becoming SE late. Seas 2 ft. Wave Detail: SE 2 ft at 7 seconds. .TONIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 7 seconds. .FRI...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds. .FRI NIGHT...S winds 10 to 15 kt, becoming W 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 9 seconds. .SAT...NW winds 20 to 25 kt, becoming N 25 to 30 kt in the afternoon. Seas 3 to 4 ft, building to 4 to 6 ft in the afternoon. Wave Detail: NW 4 ft at 4 seconds and E 1 foot at 9 seconds, becoming N 5 ft at 4 seconds and E 5 ft at 9 seconds. A chance of showers. .SAT NIGHT...N winds 30 to 35 kt. Seas 5 to 7 ft, building to 7 to 9 ft after midnight. Wave Detail: N 7 ft at 6 seconds, becoming NE 9 ft at 7 seconds. A chance of showers in the evening. .SUN...NE winds 30 to 35 kt. Seas 8 to 10 ft. A chance of showers. .SUN NIGHT...NE winds 30 to 35 kt. Seas 9 to 13 ft. A slight chance of showers. .MON...NE winds 25 to 30 kt. Seas 9 to 12 ft. A chance of showers. .MON NIGHT...NE winds 25 to 30 kt. Seas 8 to 10 ft. A slight chance of showers. $$ AMZ380-152300- Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM- 539 AM EDT Thu Oct 15 2026 .TODAY...W winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at 7 seconds. .TONIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at 8 seconds. .FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 9 seconds, becoming SW 4 ft at 5 seconds and E 2 ft at 9 seconds. A slight chance of showers and tstms after midnight. .SAT...N winds 25 to 30 kt. Seas 4 to 6 ft, building to 6 to 8 ft in the afternoon. Wave Detail: NW 6 ft at 5 seconds and E 2 ft at 9 seconds, becoming N 7 ft at 6 seconds and E 2 ft at 9 seconds. A slight chance of showers and tstms in the morning, then a chance of showers in the afternoon. .SAT NIGHT...N winds 30 kt with gusts to 40 kt. Seas 8 to 10 ft, building to 9 to 12 ft after midnight. Wave Detail: N 10 ft at 7 seconds, becoming NE 12 ft at 8 seconds. A chance of showers, mainly in the evening. .SUN...NE winds 30 to 35 kt. Seas 10 to 13 ft. A chance of showers. .SUN NIGHT...NE winds 30 to 35 kt. Seas 10 to 14 ft. A chance of showers. .MON...NE winds 25 to 30 kt. Seas 9 to 12 ft. A chance of showers. .MON NIGHT...NE winds 25 to 30 kt. Seas 8 to 10 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$ AMZ382-152300- Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM- 539 AM EDT Thu Oct 15 2026 .TODAY...SW winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds. .TONIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at 3 seconds. .FRI...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 3 seconds and SE 2 ft at 9 seconds. A slight chance of showers in the morning. .FRI NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 9 seconds, becoming SW4 ft at 4 seconds and E 2 ft at 9 seconds. A slight chance of showers and tstms after midnight. .SAT...N winds 25 to 30 kt. Seas 4 to 6 ft, building to 6 to 8 ft in the afternoon. Wave Detail: NW 6 ft at 5 seconds and E 2 ft at 9 seconds, becoming N 7 ft at 6 seconds and E 2 ft at 9 seconds. A slight chance of showers and tstms in the morning, then a chance of showers in the afternoon. .SAT NIGHT...N winds 30 to 35 kt with gusts to 45 kt. Seas 7 to 9 ft, building to 9 to 12 ft after midnight. Wave Detail: NE 9 ft at 9 seconds and N 8 ft at 6 seconds, becoming NE 12 ft at 8 seconds. A chance of showers, mainly in the evening. .SUN...NE winds 30 to 35 kt. Seas 10 to 14 ft. A chance of showers. .SUN NIGHT...NE winds 30 to 35 kt. Seas 12 to 14 ft. A chance of showers. .MON...NE winds 25 to 30 kt. Seas 10 to 13 ft. A chance of showers. .MON NIGHT...NE winds 25 to 30 kt. Seas 9 to 11 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$ AMZ384-152300- Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM- 539 AM EDT Thu Oct 15 2026 .TODAY...SW winds 5 kt, becoming NW early this afternoon, then becoming NE late. Seas 2 ft. Wave Detail: SE 2 ft at 7 seconds. .TONIGHT...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds and SE 1 foot at 3 seconds. .FRI...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at 8 seconds and SE 1 foot at 3 seconds. .FRI NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Wave Detail: S 2 ft at 3 seconds and SE 2 ft at 9 seconds, becoming SW 3 ft at 4 seconds and E 2 ft at 9 seconds. A slight chance of showers and tstms after midnight. .SAT...N winds 25 to 30 kt. Seas 4 to 6 ft, building to 6 to 8 ft in the afternoon. Wave Detail: NW 5 ft at 5 seconds and E 2 ft at 9 seconds, becoming N 7 ft at 6 seconds and E 1 foot at 9 seconds. A slight chance of tstms in the morning. A chance of showers. .SAT NIGHT...N winds 30 to 35 kt with gusts to 45 kt. Seas 8 to 10 ft, building to 9 to 12 ft after midnight. Wave Detail: NE 10 ft at 9 seconds and N 8 ft at 6 seconds, becoming NE 12 ft at 8 seconds. A chance of showers, mainly in the evening. .SUN...NE winds 30 to 35 kt. Seas 10 to 14 ft. A chance of showers. .SUN NIGHT...NE winds 30 to 35 kt. Seas 12 to 15 ft. A chance of showers. .MON...NE winds 30 kt. Seas 11 to 14 ft. A chance of showers. .MON NIGHT...NE winds 25 to 30 kt. Seas 10 to 12 ft. A chance of showers. Winds and seas higher in and near tstms. $$