Expires:202405050830;;622676 FZUS52 KCHS 041936 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 336 PM EDT Sat May 4 2024 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 AMZ300-050830- 336 PM EDT Sat May 4 2024 .Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... Atlantic high pressure will remain across the Southeast U.S. through much of next week. A cold front will approach the area on Friday. $$