South Dewees Island Weather Forecast

    • 75
    • 87

    Rain Showers Likely

    • 75
    • 85

    Rain Showers Likely

    • 76
    • 86

    Rain Showers Likely

    • 75
    • 87

    Rain Showers Likely

    • 75
    • 86

    Chance Thunderstorms

Today 25 Aug Charleston

Mostly sunny. A chance of Showers and Thunderstorms in the afternoon. Highs in the lower 90s, except in the upper 80s near the coast. Northwest Winds around 5 Mph, becoming southeast in the afternoon. Chance of rain 40 percent.

Tonight 25 Aug Charleston

Mostly clear. Lows in the mid 70s. West Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Dewees Island Temperature Statistics

August Temperature

Mount Pleasant Regional-Faison Field (5 miles)

  • Lowest 5 August, 2026

    73.4 °F

  • Average August

    82.9 °F

  • Highest 17 August, 2026

    98.6 °F

Climate (2021–2026)

Mount Pleasant Regional-Faison Field (5 miles)

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  • Average Low 2021–2026

    58.4 °F

  • Average 2021–2026

    66.5 °F

  • Average High 2021–2026

    75.6 °F
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