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.

A Few Clouds

90°F

32°C

Humidity 63%
Wind Speed SW 9 G 16 mph
Barometer 30.08 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 17 Jun 1:15 pm EDT
Extended Forecast for

Johns Island SC

  • This Afternoon

    This Afternoon: Sunny, with a high near 90. Heat index values as high as 102. South wind 10 to 13 mph.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 78. South wind 9 to 11 mph.

    Low: 78 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 90. Heat index values as high as 102. Southwest wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 78. Southwest wind 10 to 13 mph, with gusts as high as 22 mph.

    Low: 78 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 91. Southwest wind 8 to 11 mph.

    High: 91 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78.

    Low: 78 °F

    Chance
    T-storms

  • Friday

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

    High: 91 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 77.

    Low: 77 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly after 8am. Mostly sunny, with a high near 89.

    High: 89 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 90. Heat index values as high as 102. South wind 10 to 13 mph.
Tonight
Mostly clear, with a low around 78. South wind 9 to 11 mph.
Wednesday
Sunny, with a high near 90. Heat index values as high as 102. Southwest wind 9 to 14 mph, with gusts as high as 21 mph.
Wednesday Night
Partly cloudy, with a low around 78. Southwest wind 10 to 13 mph, with gusts as high as 22 mph.
Juneteenth
A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 91. Southwest wind 8 to 11 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78.
Friday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 91.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 77.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after 8am. Mostly sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 78.
Sunday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 90.
Sunday Night
Mostly clear, with a low around 77.
Monday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Johns Island SC
 32.71°N 80.07°W (Elev. 10 ft)
Last Update:
12:42 pm EDT Jun 17, 2025
Forecast Valid:
1pm EDT Jun 17, 2025-6pm EDT Jun 23, 2025
 
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Additional Resources

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Chance of Precipitation