Cape Romain Harbor - Mill Island Weather Forecast

    • 75
    • 85

    Mostly Sunny

    • 76
    • 87

    Mostly Sunny

    • 75
    • 85

    Chance Thunderstorms

    • 76
    • 86

    Chance Thunderstorms

    • 76
    • 85

    Chance Thunderstorms

    • 76
    • 83

    Rain Showers Likely

Today 17 Aug Charleston

Mostly sunny with a slight chance of Showers and Thunderstorms. Highs in the upper 80s. East Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 17 Aug Charleston

Mostly clear. Lows in the lower 70s. Southeast Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Real-Time

Cape Romain Harbor - Mill Island Temperature Statistics

August Temperature

Georgetown County Airport (19.3 miles)

  • Lowest 3 August, 2025

    68 °F

  • Average August

    76.8 °F

  • Highest 1 August, 2025

    95 °F

Climate (2020–Present)

Georgetown County Airport (19.3 miles)

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  • Average Low 2020–2025

    54.8 °F

  • Average 2020–2025

    64 °F

  • Average High 2020–2025

    74.3 °F
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