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CHARLESTON 7 Day Forecast

NWS Forecast for: Charleston SC Issued by: National Weather Service Charleston, SC Last Update: 2:40 am EDT Aug 15, 2026

Today High: 96 °F Mostly Sunny then Slight Chance T-storms Tonight Low: 80 °F Slight Chance T-storms then Mostly Cloudy Sunday High: 96 °F Mostly Sunny then Chance T-storms Sunday Night Low: 80 °F Chance T-storms then Mostly Clear Monday High: 100 °F Hot Monday Night Low: 82 °F Mostly Clear Tuesday High: 100 °F Hot Tuesday Night Low: 80 °F Slight Chance T-storms Wednesday High: 96 °F Mostly Sunny then Chance T-storms

Extreme Heat Warning Today: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96. Heat index values as high as 113. Light west wind becoming southwest 5 to 10 mph in the morning. Tonight: A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 80. Southwest wind 3 to 7 mph. Sunday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 96. Heat index values as high as 112. Calm wind becoming south 5 to 7 mph in the afternoon. Sunday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 80. Southwest wind around 6 mph. Monday: Sunny and hot, with a high near 100. Southwest wind 5 to 8 mph. Monday Night: Mostly clear, with a low around 82. Tuesday: Sunny and hot, with a high near 100. Tuesday Night: A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 80. Wednesday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96. Wednesday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 80. Thursday: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 96. Thursday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 79. Friday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.

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

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