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CHARLESTON 7 Day Forecast

NWS Forecast for: Charleston SC Issued by: National Weather Service Charleston, SC Last Update: 8:32 am EDT Aug 19, 2026

Today High: 96 °F Sunny Tonight Low: 80 °F Mostly Clear Thursday High: 96 °F Sunny then Slight Chance T-storms Thursday Night Low: 80 °F Mostly Clear Friday High: 95 °F Sunny then Chance T-storms Friday Night Low: 78 °F Chance T-storms Saturday High: 93 °F Slight Chance T-storms then T-storms Likely Saturday Night Low: 76 °F T-storms Likely Sunday High: 93 °F Chance T-storms

Heat Advisory Today: Sunny, with a high near 96. Heat index values as high as 111. Calm wind becoming south 5 to 8 mph in the afternoon. Tonight: Mostly clear, with a low around 80. South wind around 5 mph becoming calm in the evening. Thursday: A slight chance of showers and thunderstorms between 2pm and 3pm. Sunny, with a high near 96. Heat index values as high as 112. Calm wind becoming south 5 to 9 mph in the afternoon. Chance of precipitation is 20%. Thursday Night: Mostly clear, with a low around 80. South wind 5 to 7 mph. Friday: A 40 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 95. Light south wind increasing to 5 to 10 mph in the morning. Friday Night: A 40 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 78. Saturday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 70%. Saturday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 76. Chance of precipitation is 60%. Sunday: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 93. Sunday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Monday: A 30 percent chance of showers and thunderstorms. Sunny, with a high near 93. Monday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77. Tuesday: A 30 percent chance of showers and thunderstorms. Sunny, with a high near 92.

Charleston SCSimilar City Names  32.79°N 80.01°W (Elev. 10 ft)

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