Saint Simons Island Weather Forecast

    • 55
    • 72

    Mostly Sunny

    • 56
    • 73

    Partly Sunny

    • 56
    • 73

    Partly Sunny

    • 57
    • 72

    Partly Sunny

    • 42
    • 73

    Partly Sunny

    • 36
    • 54

    Partly Sunny

    • 36
    • 56

    Mostly Sunny

Today 25 Dec Coastal Glynn

Mostly sunny. Highs in the mid 70s. Southwest Winds around 5 Mph.

Tonight 25 Dec Coastal Glynn

Mostly clear. Patchy fog after midnight. Lows in the mid 50s. West Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Simons Island Temperature Statistics

December Temperature

Brunswick, Malcolm McKinnon Airport (0.6 miles)

  • Lowest 15 December, 2025

    33.8 °F

  • Average December

    54.6 °F

  • Highest 5 December, 2025

    75.2 °F

Climate (2020–Present)

Brunswick, Malcolm McKinnon Airport (0.6 miles)

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  • Average Low 2020–2025

    63 °F

  • Average 2020–2025

    70.2 °F

  • Average High 2020–2025

    77.9 °F
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