Charleston Area NWS Forecast
Forecast for Charleston updated at 5:57 PM on August 8, 2026
- Tonight Mostly cloudy with a slight chance of showers this evening, then partly cloudy after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 20 percent.
- Sunday Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. West winds around 5 mph, becoming south in the afternoon. Chance of rain 20 percent.
- Sunday Night Mostly clear. Lows in the upper 70s. Southwest winds 5 to 10 mph.
- Monday Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s, except in the upper 80s near the coast. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 107.
- Monday Night Partly cloudy with a slight chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the upper 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent.
- Tuesday Sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 110.
- Tuesday Night Partly cloudy. Lows in the upper 70s. Heat index values up to 105 early in the evening.
- Wednesday Sunny. Highs in the mid 90s. Heat index values up to 110.
- Wednesday Night Partly cloudy. Lows in the upper 70s. Heat index values up to 110 early in the evening.
- Thursday Sunny. Highs in the lower 90s. Heat index values up to 115.
- Thursday Night Partly cloudy. Lows around 80. Heat index values up to 110 early in the evening.
- Friday Mostly sunny with a chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 30 percent. Heat index values up to 115.
- Friday Night Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 30 percent. Heat index values up to 110 early in the evening.
- Saturday Mostly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 110.