Sullivan's Island Weather Forecast

    • 66
    • 73

    Increasing Clouds

    • 57
    • 76

    Slight Chance Thunderstorms

    • 58
    • 69

    Mostly Sunny

    • 61
    • 73

    Mostly Sunny

    • 54
    • 73

    Mostly Sunny

    • 55
    • 68

    Mostly Sunny

    • 59
    • 68

    Partly Sunny

Today 18 Oct Charleston

Sunny. Highs in the mid 70s. South Winds around 5 Mph.

Tonight 18 Oct Charleston

Mostly clear. Lows in the lower 60s. South Winds around 5 Mph.

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  • Temperature Real-Time

Sullivan's Island Temperature Statistics

October Temperature

Mount Pleasant Regional-Faison Field (9.3 miles)

  • Lowest 14 October, 2025

    57.2 °F

  • Average October

    68.5 °F

  • Highest 6 October, 2025

    84.2 °F

Climate (2020–Present)

Mount Pleasant Regional-Faison Field (9.3 miles)

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  • Average Low 2020–2025

    58.5 °F

  • Average 2020–2025

    66.5 °F

  • Average High 2020–2025

    75.4 °F
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