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CHARLESTON 7 Day Forecast

NWS Forecast for: Charleston SC
Issued by: National Weather Service Charleston, SC
Last Update: 8:32 am EDT Aug 21, 2026		Print

Today

Today: A slight chance of showers and thunderstorms between 1pm and 5pm. Sunny, with a high near 95. Heat index values as high as 110. Light southwest wind becoming south 6 to 11 mph in the afternoon. Chance of precipitation is 20%.

High: 95 °F

Sunny then
Slight Chance
T-storms

Tonight

Tonight: A 40 percent chance of showers and thunderstorms, mainly after 9pm. Mostly cloudy, with a low around 77. South wind 5 to 9 mph.

Low: 77 °F

Chance
T-storms


Saturday

Saturday: A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 91. Heat index values as high as 103. Light west wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

High: 91 °F

Chance
Showers then
Showers
Likely

Saturday
Night

Saturday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 76. Southwest wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Low: 76 °F

Showers
Likely


Sunday

Sunday: Sunny, with a high near 94. West wind 5 to 8 mph.

High: 94 °F

Sunny



Sunday
Night

Sunday Night: Mostly clear, with a low around 76.

Low: 76 °F

Mostly Clear



Monday

Monday: Sunny, with a high near 93.

High: 93 °F

Sunny



Monday
Night

Monday Night: Partly cloudy, with a low around 75.

Low: 75 °F

Partly Cloudy



Tuesday

Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 91.

High: 91 °F

Chance
T-storms





Today: A slight chance of showers and thunderstorms between 1pm and 5pm. Sunny, with a high near 95. Heat index values as high as 110. Light southwest wind becoming south 6 to 11 mph in the afternoon. Chance of precipitation is 20%.

Tonight: A 40 percent chance of showers and thunderstorms, mainly after 9pm. Mostly cloudy, with a low around 77. South wind 5 to 9 mph.

Saturday: A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 91. Heat index values as high as 103. Light west wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 76. Southwest wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: Sunny, with a high near 94. West wind 5 to 8 mph.

Sunday Night: Mostly clear, with a low around 76.

Monday: Sunny, with a high near 93.

Monday Night: Partly cloudy, with a low around 75.

Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 91.

Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 75.

Wednesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

Wednesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.

Thursday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.


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

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