Saint Simons Island Weather Forecast

    • 63
    • 80

    Mostly Sunny

    • 66
    • 85

    Mostly Sunny

    • 67
    • 86

    Mostly Sunny

    • 73
    • 87

    Mostly Sunny

    • 75
    • 85

    Mostly Sunny

    • 76
    • 86

    Chance Rain Showers

Today 26 Sep Coastal Glynn

Sunny. Highs in the lower 80s. Northeast Winds 5 to 10 Mph.

Tonight 26 Sep Coastal Glynn

Mostly clear. Lows in the upper 50s. Northeast Winds around 5 Mph, becoming west after midnight.

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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 24 September, 2026

    66.2 °F

  • Average September

    81.8 °F

  • Highest 5 September, 2026

    93.2 °F

Climate (2021–2026)

Brunswick, Malcolm McKinnon Airport (0.6 miles)

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  • Average Low 2021–2026

    63.1 °F

  • Average 2021–2026

    70.4 °F

  • Average High 2021–2026

    78.2 °F
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