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CHARLESTON 7 Day Forecast

NWS Forecast for: Charleston SC Issued by: National Weather Service Charleston, SC Last Update: 2:35 pm EDT May 21, 2026

Tonight Low: 73 °F Increasing Clouds Friday High: 87 °F Slight Chance T-storms then Mostly Sunny Friday Night Low: 75 °F Mostly Cloudy Saturday High: 88 °F Slight Chance Showers then Chance T-storms Saturday Night Low: 75 °F Chance T-storms then Chance Showers Sunday High: 87 °F Showers Likely Sunday Night Low: 74 °F Chance Showers Memorial Day High: 88 °F Chance Showers Monday Night Low: 74 °F Partly Cloudy

Hazardous Weather Outlook Tonight: Increasing clouds, with a low around 73. South wind 5 to 10 mph becoming light after midnight. Friday: A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and noon. Mostly sunny, with a high near 87. Light south wind increasing to 6 to 11 mph in the morning. Chance of precipitation is 20%. Friday Night: Mostly cloudy, with a low around 75. South wind 3 to 7 mph. Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. South wind 5 to 10 mph. Chance of precipitation is 30%. Saturday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers after 2am. Mostly cloudy, with a low around 75. South wind 3 to 7 mph. Chance of precipitation is 40%. Sunday: A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. Sunday Night: A chance of showers before 8pm, then a slight chance of showers after 2am. Partly cloudy, with a low around 74. Chance of precipitation is 30%. Memorial Day: A 30 percent chance of showers and thunderstorms, mainly between 8am and 2pm. Partly sunny, with a high near 88. Monday Night: Partly cloudy, with a low around 74. Tuesday: A 30 percent chance of showers and thunderstorms, mainly before 2pm. Partly sunny, with a high near 88. Tuesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. Wednesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. Wednesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Thursday: Showers and thunderstorms likely. Partly sunny, with a high near 86. Chance of precipitation is 60%.

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

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