Cape Romain Harbor - Mill Island Weather Forecast

    • 75
    • 85

    Chance Thunderstorms

    • 75
    • 85

    Rain Showers

    • 74
    • 85

    Rain Showers

    • 74
    • 84

    Chance Thunderstorms

    • 76
    • 85

    Chance Thunderstorms

    • 76
    • 86

    Slight Chance Thunderstorms

Today 26 Aug Charleston

Mostly cloudy Early, then becoming partly sunny. A chance of Showers and Thunderstorms. Highs in the upper 80s. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 26 Aug Charleston

Mostly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then partly cloudy with a chance of Showers and Thunderstorms after midnight. Lows in the mid 70s. South Winds 5 to 10 Mph. Chance of rain 50 percent.

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Cape Romain Harbor - Mill Island Temperature Statistics

August Temperature

Georgetown County Airport (19.3 miles)

  • Lowest 23 August, 2026

    69.8 °F

  • Average August

    80.2 °F

  • Highest 15 August, 2026

    96.8 °F

Climate (2021–2026)

Georgetown County Airport (19.3 miles)

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  • Average Low 2021–2026

    54.6 °F

  • Average 2021–2026

    64 °F

  • Average High 2021–2026

    74.4 °F
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