National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Charleston Executive Airport (KJZI)

Lat: 32.7°NLon: 80°WElev: 16ft.

Fair

79°F

26°C

Humidity 84%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 21 Jun 9:35 pm EDT
Extended Forecast for

Sullivans Island SC

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 10pm and 11pm. Partly cloudy, with a low around 77. Southwest wind 6 to 9 mph. Chance of precipitation is 20%.

    Low: 77 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 88. West wind 7 to 15 mph, with gusts as high as 22 mph.

    High: 88 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 80. Southwest wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 80 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 90. Heat index values as high as 102. West wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 90 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 78. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 78. Chance of precipitation is 30%.

    Low: 78 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers, with thunderstorms also possible after 8am. Mostly sunny, with a high near 86. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.

    Low: 77 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between 10pm and 11pm. Partly cloudy, with a low around 77. Southwest wind 6 to 9 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 88. West wind 7 to 15 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 80. Southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 90. Heat index values as high as 102. West wind 11 to 15 mph, with gusts as high as 23 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 78. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Wednesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87.
Wednesday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 78. Chance of precipitation is 30%.
Thursday
A slight chance of showers, with thunderstorms also possible after 8am. Mostly sunny, with a high near 86. Chance of precipitation is 20%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 87.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78.
Saturday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 90.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 79.
Sunday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivans Island SC
 32.76°N 79.85°W (Elev. 0 ft)
Last Update:
8:32 pm EDT Jun 21, 2026
Forecast Valid:
9pm EDT Jun 21, 2026-6pm EDT Jun 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation