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CHARLESTON 7 Day Forecast

NWS Forecast for: Charleston SC Issued by: National Weather Service Charleston, SC Last Update: 8:30 am EDT Aug 23, 2026

Today High: 93 °F Chance T-storms Tonight Low: 77 °F Slight Chance T-storms then Mostly Clear Monday High: 93 °F Sunny then Chance T-storms Monday Night Low: 75 °F Chance T-storms then Chance Showers Tuesday High: 90 °F Slight Chance T-storms then Chance T-storms Tuesday Night Low: 75 °F Showers Likely Wednesday High: 90 °F Chance Showers then T-storms Likely Wednesday Night Low: 76 °F T-storms Likely Thursday High: 90 °F Chance T-storms then T-storms Likely

Today: A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 93. Heat index values as high as 103. West wind 5 to 7 mph becoming south in the afternoon. Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 77. Southwest wind 3 to 7 mph. Monday: A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 93. Heat index values as high as 102. South wind 3 to 8 mph. Monday Night: A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 75. Southwest wind around 6 mph becoming calm in the evening. Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 90. Calm wind becoming south 5 to 8 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Partly cloudy, with a low around 75. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Wednesday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 60%. Wednesday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 76. Chance of precipitation is 60%. Thursday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 60%. Thursday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 76. Chance of precipitation is 60%. Friday: Showers and thunderstorms likely. Mostly sunny, with a high near 90. Chance of precipitation is 60%. Friday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 76. Chance of precipitation is 60%. Saturday: Showers and thunderstorms likely. Partly sunny, with a high near 90. Chance of precipitation is 60%.

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

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