####018008166#### FZUS52 KCHS 221042 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 642 AM EDT Tue Jul 22 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 AMZ300-222315- 642 AM EDT Tue Jul 22 2025 .Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... A weak front is expected to stall over or near our area through Thursday, then dissipate on Friday. The weekend will feature a return of Atlantic High pressure and surface troughing inland. $$ AMZ330-222315- Charleston Harbor- 642 AM EDT Tue Jul 22 2025 .TODAY...NW winds 5 to 10 kt, becoming SE this afternoon. A slight chance of showers and tstms late this morning. A chance of showers and tstms early this afternoon, then showers and tstms late. .TONIGHT...NE winds 5 to 10 kt. Showers and tstms. .WED...E winds 10 to 15 kt. Showers. A chance of tstms in the morning, then tstms likely in the afternoon. .WED NIGHT...SE winds 5 to 10 kt. Showers and tstms likely, mainly in the evening. .THU...SE winds 5 kt, becoming S in the afternoon. Showers likely with a chance of tstms. .THU NIGHT...S winds 5 to 10 kt. A chance of showers and tstms, mainly in the evening. .FRI...SW winds 5 to 10 kt. A chance of showers and tstms. .FRI NIGHT...SW winds 5 to 10 kt. A slight chance of showers and tstms. .SAT...SW winds 5 to 10 kt. A chance of showers and tstms. .SAT NIGHT...SW winds 5 to 10 kt. Winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston Harbor water temperature 86 degrees. $$ AMZ350-222315- Waters from South Santee River to Edisto Beach SC out 20 NM- 642 AM EDT Tue Jul 22 2025 .TODAY...NW winds 5 to 10 kt, becoming SE this afternoon. Seas 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms early this morning, then a chance of showers and tstms late this morning and early afternoon. Showers and tstms likely late. .TONIGHT...E winds 10 to 15 kt. Seas 2 ft. Wave Detail: E 2 ft at 3 seconds and SW 1 foot at 4 seconds. Tstms likely. Showers likely. .WED...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and SE 2 ft at 8 seconds. Showers with tstms likely. .WED NIGHT...SE winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 6 seconds. Showers likely with a chance of tstms. .THU...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 5 seconds and S 2 ft at 5 seconds. Showers likely with a chance of tstms. .THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 2 ft at 8 seconds. A chance of showers and tstms. .FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .FRI NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. .SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. .SAT NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ352-222315- Waters from Edisto Beach SC to Savannah GA out 20 NM- 642 AM EDT Tue Jul 22 2025 .TODAY...W winds 5 to 10 kt, becoming S this afternoon. Seas 2 ft. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms until late afternoon, then a chance of showers and tstms late. .TONIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 1 foot at 3 seconds and SE 1 foot at 8 seconds. Showers and tstms likely, mainly in the evening. .WED...E winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and SE 2 ft at 7 seconds. Showers with tstms likely. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 5 seconds. Showers likely. Tstms likely, mainly in the evening. .THU...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 5 seconds and NE 1 foot at 5 seconds. Showers likely with a chance of tstms. .THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 2 ft at 8 seconds. A slight chance of showers and tstms in the evening, then a chance of showers and tstms after midnight. .FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .FRI NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. .SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. .SAT NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ354-222315- Waters from Savannah GA to Altamaha Sound GA out 20 NM, including Grays Reef National Marine Sanctuary- 642 AM EDT Tue Jul 22 2025 .TODAY...W winds 5 to 10 kt, becoming S this afternoon. Seas 2 ft. Wave Detail: W 1 foot at 3 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms early this morning. A slight chance of showers and tstms early this afternoon, then a chance of showers and tstms late. .TONIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 1 foot at 3 seconds and SE 1 foot at 8 seconds. Showers and tstms likely, mainly in the evening. .WED...E winds 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and SE 2 ft at 8 seconds. Showers with a chance of tstms in the morning, then showers and tstms likely in the afternoon. .WED NIGHT...SE winds 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 5 seconds and SE 2 ft at 8 seconds. Showers likely. Tstms likely, mainly in the evening. .THU...S winds 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 5 seconds and NE 1 foot at 4 seconds. A chance of tstms. Showers likely, mainly in the morning. .THU NIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at 5 seconds and E 2 ft at 8 seconds. A chance of showers and tstms. .FRI...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .FRI NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. .SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. .SAT NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ374-222315- Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM- 642 AM EDT Tue Jul 22 2025 .TODAY...W winds 5 to 10 kt, becoming S late. Seas 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 8 seconds. A slight chance of showers and tstms until late afternoon, then a chance of showers and tstms late. .TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and SE 2 ft at 8 seconds. Tstms likely. Showers likely. .WED...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds. Showers. Tstms likely, mainly in the morning. .WED NIGHT...SE winds 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and SE 2 ft at 8 seconds. A chance of tstms. A chance of showers in the evening, then showers likely after midnight. .THU...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and NE 1 foot at 5 seconds. A chance of tstms. Showers likely, mainly in the morning. .THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and SE 2 ft at 5 seconds. A slight chance of showers and tstms in the evening, then a chance of showers and tstms after midnight. .FRI...S winds 5 to 10 kt. Seas 3 ft. A chance of showers and tstms. .FRI NIGHT...SW winds 10 kt. Seas 3 ft. A slight chance of showers and tstms. .SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. .SAT NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$