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

75°F

24°C

Humidity 100%
Wind Speed N 7 mph
Barometer 30.13 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Last update 30 Aug 7:35 am EDT
Extended Forecast for

Johns Island SC

  • Today

    Today: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. Calm wind becoming southeast 5 to 7 mph in the afternoon. New rainfall amounts between a quarter and half of an inch possible.

    High: 87 °F

    Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 76. East wind around 5 mph becoming calm in the evening.

    Low: 76 °F

    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 88. Heat index values as high as 101. Calm wind becoming east 5 to 7 mph in the afternoon. Chance of precipitation is 20%.

    High: 88 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 76. Light and variable wind.

    Low: 76 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. Calm wind becoming southeast 5 to 8 mph in the afternoon.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 2pm. Sunny, with a high near 90.

    High: 90 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. Calm wind becoming southeast 5 to 7 mph in the afternoon. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Mostly cloudy, with a low around 76. East wind around 5 mph becoming calm in the evening.
Monday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 88. Heat index values as high as 101. Calm wind becoming east 5 to 7 mph in the afternoon. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 76. Light and variable wind.
Tuesday
Mostly sunny, with a high near 89. Calm wind becoming southeast 5 to 8 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 76.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Partly cloudy, with a low around 76.
Thursday
A 20 percent chance of showers and thunderstorms before 2pm. Sunny, with a high near 90.
Thursday Night
Mostly clear, with a low around 77.
Friday
Sunny, with a high near 92.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 77.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Johns Island SC
 32.71°N 80.07°W (Elev. 10 ft)
Last Update:
2:35 am EDT Aug 30, 2026
Forecast Valid:
7am EDT Aug 30, 2026-6pm EDT Sep 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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