FZUS52 KCHS 152139 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 538 PM 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 AMZ300-161100- 538 PM 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. $$ AMZ340-161100- Charleston Harbor- 539 PM EDT Thu Oct 15 2026 .TONIGHT...SW winds 5 to 10 kt. .FRI...W winds 5 kt, becoming SW 10 to 15 kt in the afternoon. Patchy fog in the morning. .FRI NIGHT...SW winds 10 kt. .SAT...N winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A chance of showers. .SAT NIGHT...N winds 15 to 20 kt with gusts to 30 kt. Waves 1 to 2 ft. A chance of showers in the evening. .SUN...N winds 20 to 25 kt with gusts to 30 kt. Waves 2 to 3 ft. .SUN NIGHT...NE winds 15 to 20 kt with gusts to 30 kt. Waves 1 to 2 ft. .MON...NE winds 15 to 20 kt. Waves 1 to 2 ft. .MON NIGHT...NE winds 15 to 20 kt. Waves 1 to 2 ft. .TUE...N winds 15 kt. .TUE NIGHT...N winds 10 to 15 kt. Unless otherwise noted, waves 1 foot or less. Charleston Harbor water temperature 78 degrees. $$ AMZ360-161100- Coastal waters from South Santee River to Edisto Beach SC out 20 NM- 539 PM EDT Thu Oct 15 2026 .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 with gusts to 20 kt in the afternoon. Seas 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 9 seconds. .FRI NIGHT...SW winds 15 to 20 kt. 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...N winds 20 to 25 kt with gusts to 30 kt. Seas 4 to 5 ft. Wave Detail: N 5 ft at 5 seconds and E 3 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 and W 3 ft at 5 seconds, becoming NE 8 ft at 7 seconds. A chance of showers in the evening. .SUN...N winds 30 kt with gusts to 40 kt. Seas 7 to 9 ft, building to 8 to 10 ft in the afternoon. Wave Detail: NE 9 ft at 8 seconds, becoming NE 10 ft at 8 seconds. A slight chance of showers in the afternoon. .SUN NIGHT...NE winds 25 to 30 kt with gusts to 40 kt. Seas 8 to 10 ft. A slight chance of showers in the evening. .MON...NE winds 25 to 30 kt. Seas 8 to 10 ft. A slight chance of showers. .MON NIGHT...NE winds 25 to 30 kt. Seas 7 to 9 ft. .TUE...N winds 20 to 25 kt. Seas 6 to 8 ft. .TUE NIGHT...NE winds 20 to 25 kt. Seas 5 to 7 ft. $$ AMZ362-161100- Coastal waters from Edisto Beach SC to Savannah GA out 20 NM- 539 PM EDT Thu Oct 15 2026 .TONIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 7 seconds. .FRI...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 9 seconds and S 1 foot at 3 seconds. .FRI NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 9 seconds. A slight chance of showers after midnight. .SAT...N winds 20 to 25 kt with gusts to 30 kt. Seas 3 to 4 ft, building to 4 to 5 ft in the afternoon. Wave Detail: NW 4 ft at 4 seconds and E 1 foot at 9 seconds, becoming N 5 ft at 4 seconds and E 2 ft at 9 seconds. A chance of showers. .SAT NIGHT...N winds 25 to 30 kt with gusts to 40 kt. Seas 5 to 7 ft, building to 6 to 8 ft after midnight. Wave Detail: N 7 ft at 5 seconds, becoming NE 8 ft at 6 seconds. A chance of showers in the evening. .SUN...NE winds 25 to 30 kt with gusts to 40 kt. Seas 7 to 9 ft. Wave Detail: NE 9 ft at 8 seconds. A slight chance of showers in the afternoon. .SUN NIGHT...NE winds 30 kt with gusts to 40 kt. Seas 8 to 10 ft, building to 9 to 11 ft after midnight. A slight chance of showers in the evening. .MON...NE winds 25 to 30 kt. Seas 8 to 10 ft. A slight chance of showers. .MON NIGHT...NE winds 25 to 30 kt. Seas 8 to 10 ft. .TUE...N winds 20 to 25 kt. Seas 6 to 8 ft. .TUE NIGHT...NE winds 20 to 25 kt. Seas 6 to 8 ft. $$ AMZ364-161100- Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary- 539 PM EDT Thu Oct 15 2026 .TONIGHT...SE winds 5 to 10 kt, becoming SW late. Seas 2 ft. Wave Detail: SE 2 ft at 7 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 W 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot 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 5 ft at 9 seconds. A chance of showers. .SAT NIGHT...N winds 25 to 35 kt, becoming NE 30 to 35 kt after midnight. 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. Wave Detail: NE 10 ft at 8 seconds. A slight chance of showers in the afternoon. .SUN NIGHT...NE winds 30 to 35 kt with gusts to 45 kt. Seas 9 to 11 ft, building to 9 to 12 ft after midnight. A slight chance of showers. .MON...NE winds 30 kt. Seas 9 to 11 ft. A chance of showers. .MON NIGHT...NE winds 25 to 35 kt. Seas 9 to 11 ft. A slight chance of showers. .TUE...NE winds 25 to 30 kt. Seas 8 to 10 ft. A slight chance of showers. .TUE NIGHT...NE winds 25 to 30 kt. Seas 7 to 9 ft. $$ AMZ380-161100- Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM- 539 PM EDT Thu Oct 15 2026 .TONIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at 8 seconds. .FRI...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 9 seconds, becoming SW 4 ft at 5 seconds and E 2 ft at 9 seconds. A chance of showers with a slight chance of tstms after midnight. .SAT...N winds 25 to 30 kt. Seas 4 to 6 ft, building to 6 to 8 ft in the afternoon. Wave Detail: NW 6 ft at 5 seconds and E 2 ft at 9 seconds, becoming N 8 ft at 6 seconds and E 2 ft at 9 seconds. A slight chance of tstms in the morning. A chance of showers. .SAT NIGHT...N winds 30 kt with gusts to 40 kt. Seas 8 to 10 ft, building to 9 to 12 ft after midnight. Wave Detail: N 10 ft at 7 seconds, becoming NE 12 ft at 8 seconds. A chance of showers, mainly in the evening. .SUN...NE winds 30 to 35 kt. Seas 10 to 13 ft, building to 11 to 14 ft in the afternoon. Wave Detail: NE 12 ft at 8 seconds, becoming NE 13 ft at 9 seconds. A slight chance of showers in the morning, then a chance of showers in the afternoon. .SUN NIGHT...NE winds 30 to 35 kt with gusts to 45 kt. Seas 11 to 14 ft, subsiding to 11 to 13 ft after midnight. A chance of showers. .MON...NE winds 30 kt. Seas 10 to 12 ft. A chance of showers. .MON NIGHT...NE winds 25 to 30 kt. Seas 9 to 11 ft. A slight chance of showers. .TUE...NE winds 25 to 30 kt. Seas 8 to 10 ft. A chance of showers. .TUE NIGHT...NE winds 20 to 25 kt. Seas 7 to 9 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$ AMZ382-161100- Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM- 539 PM EDT Thu Oct 15 2026 .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...W winds 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 3 seconds and SE 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 chance of showers with a slight chance of 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 NW 8 ft at 6 seconds and E 2 ft at 9 seconds. A slight chance of tstms in the morning. A chance of showers. .SAT NIGHT...N winds 30 kt with gusts to 45 kt. Seas 7 to 9 ft, building to 9 to 11 ft after midnight. Wave Detail: NE 9 ft at 9 seconds and N 8 ft at 6 seconds, becoming NE 11 ft at 8 seconds. A chance of showers in the evening. .SUN...NE winds 30 to 35 kt. Seas 10 to 12 ft, building to 10 to 14 ft in the afternoon. Wave Detail: NE 12 ft at 8 seconds, becoming NE 13 ft at 9 seconds. A chance of showers in the afternoon. .SUN NIGHT...NE winds 30 to 35 kt with gusts to 45 kt. Seas 11 to 15 ft, then 12 to 14 ft after midnight. A chance of showers. .MON...NE winds 30 kt. Seas 11 to 13 ft. A chance of showers. .MON NIGHT...NE winds 25 to 35 kt. Seas 9 to 12 ft. A slight chance of showers. .TUE...NE winds 25 to 30 kt. Seas 9 to 10 ft. A chance of showers. .TUE 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. $$ AMZ384-161100- Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM- 539 PM EDT Thu Oct 15 2026 .TONIGHT...SE winds 5 kt, becoming S after midnight. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds and SE 1 foot at 3 seconds. .FRI...W winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at 8 seconds and S 1 foot at 3 seconds. .FRI NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Wave Detail: S 2 ft at 4 seconds and E 2 ft at 9 seconds, becoming SW 3 ft at 4 seconds and E 2 ft at 9 seconds. A chance of showers with a slight chance of tstms after midnight. .SAT...N winds 25 to 30 kt. Seas 4 to 6 ft, building to 6 to 8 ft in the afternoon. Wave Detail: NW 5 ft at 5 seconds and E 2 ft at 9 seconds, becoming N 7 ft at 6 seconds and E 1 foot at 9 seconds. A slight chance of tstms in the morning. A chance of showers. .SAT NIGHT...N winds 30 to 35 kt with gusts to 45 kt. Seas 7 to 9 ft, building to 9 to 12 ft after midnight. Wave Detail: NE 9 ft at 9 seconds and N 8 ft at 6 seconds, becoming NE 12 ft at 8 seconds. A chance of showers in the evening. .SUN...NE winds 30 to 35 kt. Seas 10 to 12 ft, building to 10 to 14 ft in the afternoon. Wave Detail: NE 12 ft at 8 seconds, becoming NE 13 ft at 9 seconds. A slight chance of showers in the morning, then a chance of showers in the afternoon. .SUN NIGHT...NE winds 30 to 35 kt with gusts to 45 kt. Seas 12 to 15 ft, building to 13 to 15 ft after midnight. A chance of showers. .MON...NE winds 30 kt. Seas 11 to 14 ft. A chance of showers. .MON NIGHT...NE winds 25 to 35 kt. Seas 10 to 13 ft. A slight chance of showers. .TUE...NE winds 25 to 30 kt. Seas 9 to 11 ft. A chance of showers. .TUE NIGHT...NE winds 25 to 30 kt. Seas 9 to 11 ft. A slight chance of showers. Winds and seas higher in and near tstms. $$