Saint Simons Island Weather Forecast

    • 76
    • 88

    Chance Thunderstorms

    • 76
    • 89

    Rain Showers Likely

    • 77
    • 88

    Chance Thunderstorms

    • 77
    • 88

    Chance Thunderstorms

    • 77
    • 87

    Slight Chance Thunderstorms

    • 77
    • 88

    Slight Chance Thunderstorms

Today 27 Aug Coastal Glynn

Mostly sunny. A chance of Showers and Thunderstorms this afternoon. Highs around 90. South Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 27 Aug Coastal Glynn

Mostly cloudy. A chance of Showers and Thunderstorms in the evening. Lows in the mid 70s. South Winds 5 to 10 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Simons Island Temperature Statistics

August Temperature

Brunswick, Malcolm McKinnon Airport (0.6 miles)

  • Lowest 13 August, 2026

    75.2 °F

  • Average August

    83.6 °F

  • Highest 17 August, 2026

    98.6 °F

Climate (2021–2026)

Brunswick, Malcolm McKinnon Airport (0.6 miles)

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  • Average Low 2021–2026

    63 °F

  • Average 2021–2026

    70.3 °F

  • Average High 2021–2026

    78.2 °F
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