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

Hazardous Weather Conditions

Current conditions at

Mount Pleasant Regional-Faison Field (KLRO)

Lat: 32.9°NLon: 79.78°WElev: 13ft.

Fair

79°F

26°C

Humidity 100%
Wind Speed Vrbl 5 mph
Barometer 30.08 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 11 Aug 3:35 am EDT
Extended Forecast for

Sullivans Island SC

Heat Advisory August 11, 11:00am until August 11, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Partly cloudy, with a low around 80. Southwest wind around 9 mph.

    Low: 80 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 91. Heat index values as high as 108. Southwest wind 7 to 13 mph.

    High: 91 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 80. Southwest wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 80 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93. Heat index values as high as 111. West wind 8 to 11 mph.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms after 11pm. Partly cloudy, with a low around 81. Southwest wind 8 to 11 mph.

    Low: 81 °F

    Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 82.

    Low: 82 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 82.

    Low: 82 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 80. Southwest wind around 9 mph.
Tuesday
Mostly sunny, with a high near 91. Heat index values as high as 108. Southwest wind 7 to 13 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 80. Southwest wind 9 to 13 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 93. Heat index values as high as 111. West wind 8 to 11 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms after 11pm. Partly cloudy, with a low around 81. Southwest wind 8 to 11 mph.
Thursday
Sunny, with a high near 92.
Thursday Night
Partly cloudy, with a low around 82.
Friday
Mostly sunny, with a high near 93.
Friday Night
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 82.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 90.
Saturday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 80.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 80.
Monday
Sunny, with a high near 90.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sullivans Island SC
 32.76°N 79.85°W (Elev. 0 ft)
Last Update:
2:40 am EDT Aug 11, 2026
Forecast Valid:
3am EDT Aug 11, 2026-6pm EDT Aug 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation