Coastal Waters Forecast
Issued by NWS Charleston, SC
Issued by NWS Charleston, SC
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790 FZUS52 KCHS 121109 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 709 AM EDT Thu Jun 12 2025 South Santee River SC to Savannah GA out 20 NM and Savannah GA to Altamaha Sound GA out 60 NM, including Charleston Harbor and Grays Reef National Marine Sanctuary AMZ300-130015- 709 AM EDT Thu Jun 12 2025 .Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... A series of upper level disturbances will affect the area through the weekend while high pressure remains offshore. $$ AMZ330-130015- Charleston Harbor- 709 AM EDT Thu Jun 12 2025 .TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts to 20 kt late. A slight chance of showers and tstms late this morning and early afternoon. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt, diminishing to 5 to 10 kt after midnight. .FRI...S winds 5 to 10 kt. Showers and tstms likely. .FRI NIGHT...S winds 10 kt. A chance of showers and tstms. .SAT...SW winds 10 kt. Showers and tstms likely. .SAT NIGHT...SW winds 5 to 10 kt. Showers and tstms likely, mainly in the evening. .SUN...SW winds 10 to 15 kt. Showers and tstms likely. .SUN NIGHT...SW winds 10 to 15 kt. A chance of showers and tstms. .MON...SW winds 10 to 15 kt. A chance of showers and tstms. .MON NIGHT...SW winds 10 to 15 kt. A chance of showers and tstms. Winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston Harbor water temperature 81 degrees. $$ AMZ350-130015- Waters from South Santee River to Edisto Beach SC out 20 NM- 709 AM EDT Thu Jun 12 2025 .TODAY...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. .TONIGHT...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. A slight chance of showers and tstms after midnight. .FRI...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. Showers and tstms likely. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. A chance of showers and tstms in the evening, then showers and tstms likely after midnight. .SAT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. Showers and tstms likely. .SAT NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at 9 seconds. A chance of showers and tstms in the evening, then showers and tstms likely after midnight. .SUN...SW winds 10 to 15 kt. Seas 3 ft. Showers and tstms likely. .SUN NIGHT...SW winds 15 kt. Seas 3 to 4 ft. Showers and tstms likely. .MON...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. .MON NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ352-130015- Waters from Edisto Beach SC to Savannah GA out 20 NM- 709 AM EDT Thu Jun 12 2025 .TODAY...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. A slight chance of showers and tstms this morning. .TONIGHT...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. .FRI...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. Showers and tstms likely. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. A chance of showers and tstms in the evening, then showers and tstms likely after midnight. .SAT...S winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. Showers and tstms likely. .SAT NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. A chance of showers and tstms in the evening, then showers and tstms likely after midnight. .SUN...SW winds 10 to 15 kt. Seas 3 ft. Showers and tstms likely. .SUN NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Showers and tstms likely. .MON...SW winds 10 to 15 kt. Seas 3 ft. A chance of showers and tstms. .MON NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ354-130015- Waters from Savannah GA to Altamaha Sound GA out 20 NM, including Grays Reef National Marine Sanctuary- 709 AM EDT Thu Jun 12 2025 .TODAY...S winds 5 to 10 kt, becoming SE 10 to 15 kt late. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. A slight chance of showers and tstms this morning. .TONIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. .FRI...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. Showers and tstms likely, mainly in the morning. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. A chance of showers and tstms. .SAT...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. Showers and tstms likely. .SAT NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. Showers and tstms likely, mainly in the evening. .SUN...SW winds 10 kt. Seas 2 to 3 ft. Showers and tstms likely. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 ft. A chance of showers and tstms. .MON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Showers and tstms likely. .MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ374-130015- Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM- 709 AM EDT Thu Jun 12 2025 .TODAY...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 7 seconds. A slight chance of showers and tstms until late afternoon. .TONIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at 7 seconds. A slight chance of showers and tstms after midnight. .FRI...S winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. Showers and tstms likely. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. A chance of showers and tstms in the evening, then showers and tstms likely after midnight. .SAT...S winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds. Showers and tstms likely. .SAT NIGHT...S winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A chance of showers and tstms in the evening, then showers and tstms likely after midnight. .SUN...SW winds 10 to 15 kt. Seas 3 to 4 ft. Showers and tstms likely. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. Showers and tstms likely. .MON...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. .MON NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$