Saint Simons Island Weather Forecast

    • 73
    • 89

    Chance Rain Showers

    • 73
    • 90

    Mostly Sunny

    • 76
    • 87

    Mostly Sunny

    • 74
    • 87

    Chance Thunderstorms

    • 74
    • 87

    Chance Thunderstorms

    • 74
    • 85

    Chance Thunderstorms

Today 25 Aug Coastal Glynn

Mostly sunny. A chance of Showers with a slight chance of Thunderstorms. Highs in the lower 90s. West Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 25 Aug Coastal Glynn

Partly cloudy with a chance of Showers with a slight chance of Thunderstorms this Evening, then mostly clear after midnight. Lows around 70. South Winds 5 to 10 Mph, becoming west after midnight. Chance of rain 30 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 8 August, 2025

    73.4 °F

  • Average August

    82.4 °F

  • Highest 1 August, 2025

    98.6 °F

Climate (2020–Present)

Brunswick, Malcolm McKinnon Airport (0.6 miles)

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  • Average Low 2020–2025

    63.2 °F

  • Average 2020–2025

    70.3 °F

  • Average High 2020–2025

    77.9 °F
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