


Coastal Waters Forecast
Issued by NWS Charleston, SC
Issued by NWS Charleston, SC
137 FZUS52 KCHS 251040 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 640 AM EDT Fri Jul 25 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 AMZ300-252315- 640 AM EDT Fri Jul 25 2025 .Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... Atlantic high pressure will prevail into early next week, while a trough of low pressure resides inland. $$ AMZ330-252315- Charleston Harbor- 640 AM EDT Fri Jul 25 2025 .TODAY...SW winds 5 to 10 kt, becoming S this afternoon. .TONIGHT...SW winds 5 to 10 kt. .SAT...SW winds 5 to 10 kt. .SAT NIGHT...SW winds 5 to 10 kt. .SUN...W winds 5 kt, becoming SW in the afternoon. .SUN NIGHT...SW winds 5 to 10 kt. .MON...SW winds 5 to 10 kt. A slight chance of showers and tstms. .MON NIGHT...SW winds 5 to 10 kt. A slight chance of showers and tstms. .TUE...S winds 5 to 10 kt. A chance of showers and tstms. .TUE NIGHT...S winds 5 to 10 kt. A slight chance of showers and tstms. Winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston Harbor water temperature 86 degrees. $$ AMZ350-252315- Waters from South Santee River to Edisto Beach SC out 20 NM- 640 AM EDT Fri Jul 25 2025 .TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt late. Seas 2 to 3 ft. Wave Detail: E 2 ft at 7 seconds. .TONIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 8 seconds. .SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 7 seconds. .SAT NIGHT...SW winds 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 8 seconds. .SUN...W winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 4 seconds. .SUN NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at 3 seconds. .MON...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. .TUE...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ352-252315- Waters from Edisto Beach SC to Savannah GA out 20 NM- 640 AM EDT Fri Jul 25 2025 .TODAY...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at 7 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and E 1 foot at 7 seconds. .SAT...W winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft at 7 seconds. .SAT NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds. .SUN...W winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 3 seconds. .SUN NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at 3 seconds. .MON...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. .MON NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. .TUE...S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ354-252315- Waters from Savannah GA to Altamaha Sound GA out 20 NM, including Grays Reef National Marine Sanctuary- 640 AM EDT Fri Jul 25 2025 .TODAY...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 7 seconds. .TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 7 seconds. .SAT...W winds 5 to 10 kt, becoming S in the afternoon. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds and E 1 foot at 7 seconds. .SAT NIGHT...SW winds 10 kt. Seas 2 ft. Wave Detail: E 2 ft at 7 seconds. .SUN...NW winds 5 to 10 kt, becoming S in the afternoon. Seas 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at 3 seconds. .SUN NIGHT...SW winds 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at 3 seconds. .MON...SW winds 5 to 10 kt. Seas 2 ft. .MON NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. .TUE...S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ374-252315- Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM- 640 AM EDT Fri Jul 25 2025 .TODAY...S winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 2 ft at 7 seconds. .TONIGHT...SW winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds and NE 2 ft at 7 seconds. .SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and NE 1 foot at 7 seconds. .SAT NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at 3 seconds. .SUN...W winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at 3 seconds. .SUN NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 3 seconds. .MON...SW winds 5 to 10 kt. Seas 2 ft. .MON NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. .TUE...S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. Winds and seas higher in and near tstms. $$