Sullivan's Island Weather Forecast

    • 61
    • 71

    Partly Sunny

    • 62
    • 72

    Partly Sunny

    • 63
    • 72

    Partly Sunny

    • 63
    • 73

    Slight Chance Thunderstorms

    • 63
    • 73

    Slight Chance Thunderstorms

    • 56
    • 74

    Chance Rain Showers

Today 31 Mar Charleston

Sunny. Highs in the upper 70s, except in the mid 70s near the coast. South Winds 5 to 10 Mph.

Tonight 31 Mar Charleston

Mostly clear this Evening, then becoming partly cloudy. Lows around 60. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sullivan's Island Temperature Statistics

March Temperature

Mount Pleasant Regional-Faison Field (9.3 miles)

  • Lowest 18 March, 2026

    33.8 °F

  • Average March

    62.8 °F

  • Highest 21 March, 2026

    86 °F

Climate (2021–Present)

Mount Pleasant Regional-Faison Field (9.3 miles)

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  • Average Low 2021–2026

    58.2 °F

  • Average 2021–2026

    66.3 °F

  • Average High 2021–2026

    75.4 °F
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