Saint Simons Island Weather Forecast

    • 69
    • 82

    Slight Chance Rain Showers

    • 67
    • 82

    Mostly Sunny

    • 69
    • 82

    Mostly Sunny

    • 68
    • 83

    Mostly Sunny

    • 70
    • 84

    Mostly Sunny

    • 71
    • 85

    Partly Sunny

Today 13 Sep Coastal Glynn

Sunny. Highs in the lower 80s. Northeast Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 13 Sep Coastal Glynn

Mostly clear. A slight chance of Showers after midnight. Lows in the upper 60s. Northeast Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Simons Island Temperature Statistics

September Temperature

Brunswick, Malcolm McKinnon Airport (0.6 miles)

  • Lowest 10 September, 2025

    64.4 °F

  • Average September

    77.3 °F

  • Highest 5 September, 2025

    86 °F

Climate (2020–Present)

Brunswick, Malcolm McKinnon Airport (0.6 miles)

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  • Average Low 2020–2025

    63.1 °F

  • Average 2020–2025

    70.3 °F

  • Average High 2020–2025

    77.9 °F
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