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

Hazardous Weather Conditions

Current conditions at

Charleston Executive Airport (KJZI)

Lat: 32.7°NLon: 80°WElev: 16ft.

Fair

97°F

36°C

Humidity 47%
Wind Speed W 9 mph
Barometer 30.07 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index108°F (42°C)
Last update 12 Jul 1:15 pm EDT
Extended Forecast for

3 Miles WNW Johns Island SC

Heat Advisory until July 12, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until July 12, 07:00pm

    NOW until 7:00pm Sun

    Heat Advisory

  • This Afternoon

    High: 97 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 2am, then a slight chance of showers. Cloudy, then gradually becoming partly cloudy, with a low around 76. South wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 76 °F

    T-storms
    Likely then
    Showers
    Likely

  • Monday

    Monday: Showers and thunderstorms likely, mainly after 5pm. Partly sunny, with a high near 91. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Partly Sunny
    then T-storms
    Likely

  • Monday Night

    Monday Night: Showers and thunderstorms likely before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Low around 74. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 74 °F

    T-storms then
    Showers

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 90. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 75. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 75 °F

    T-storms
    Likely then
    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 77.

    Low: 77 °F

    Chance
    T-storms then
    Mostly Clear

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 97. Heat index values as high as 108. Southwest wind 7 to 9 mph.
Tonight
Showers and thunderstorms likely before 2am, then a slight chance of showers. Cloudy, then gradually becoming partly cloudy, with a low around 76. South wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and thunderstorms likely, mainly after 5pm. Partly sunny, with a high near 91. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers and thunderstorms likely before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Low around 74. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 90. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 75. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 77.
Thursday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 95.
Thursday Night
Mostly clear, with a low around 79.
Friday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 95.
Friday Night
Mostly clear, with a low around 79.
Saturday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 94.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Johns Island SC
 32.74°N 80.12°W (Elev. 10 ft)
Last Update:
8:32 am EDT Jul 12, 2026
Forecast Valid:
1pm EDT Jul 12, 2026-6pm EDT Jul 18, 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