Sullivan's Island Weather Forecast

    • 75
    • 84

    Chance Thunderstorms

    • 76
    • 84

    Rain Showers Likely

    • 77
    • 86

    Thunderstorms Likely

    • 75
    • 85

    Thunderstorms Likely

    • 75
    • 85

    Thunderstorms Likely

    • 76
    • 84

    Rain Showers Likely

    • 78
    • 86

    Rain Showers Likely

Today 3 Aug Charleston

Partly sunny with a 50 percent chance of Showers. Highs in the lower 80s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 3 Aug Charleston

Mostly cloudy with a chance of Thunderstorms. A chance of Showers. Lows in the lower 70s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sullivan's Island Temperature Statistics

August Temperature

Mount Pleasant Regional-Faison Field (9.3 miles)

  • Lowest 1 August, 2025

    73.4 °F

  • Average August

    86.2 °F

  • Highest 1 August, 2025

    95 °F

Climate (2020–Present)

Mount Pleasant Regional-Faison Field (9.3 miles)

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  • Average Low 2020–2025

    58.6 °F

  • Average 2020–2025

    66.6 °F

  • Average High 2020–2025

    75.5 °F
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