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Wind SSW at 8 mph
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Dewpoint 77°F
Humidity 90%

last updated at 10:56 PM on August 9, 2026

Charleston Weather Discussion

The latest forecast and discussion for the Charleston, SC metro area

The week ahead: High heat returns; heat advisories possible

Jared Smith / August 9, 2026 at 9:07 PM

The main weather story this week will be the return of heat that will be reminiscent of what we experienced earlier in July, with another round of dangerous heat indices pushing 110-115° at times.

Charleston Area NWS Forecast

Forecast for Charleston updated at 4:08 PM on August 9, 2026

Tonight Partly cloudy. A slight chance of showers and thunderstorms this evening. Lows in the upper 70s. Southwest winds 5 to 10 mph. Chance of rain 20 percent.
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. Heat index values up to 110. Southwest winds around 5 mph, increasing to 10 to 15 mph in the afternoon. Chance of rain 50 percent.
Monday Night Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the upper 70s. Heat index values up to 107 early in the evening. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent.
Tuesday Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. West winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 112.
Tuesday Night Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the upper 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. Heat index values up to 107 early in the evening.
Wednesday Sunny with a slight chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 110.
Wednesday Night Mostly clear. Lows in the upper 70s. Heat index values up to 105 early in the evening.
Thursday Sunny. Highs in the mid 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 slight chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 115.
Friday Night Partly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 20 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 50 percent. Heat index values up to 115.
Saturday Night Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 50 percent. Heat index values up to 110 early in the evening.
Sunday Mostly 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.

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