Saint Simons Island Weather Forecast

    • 50
    • 65

    Becoming Sunny

    • 53
    • 63

    Mostly Sunny

    • 52
    • 70

    Mostly Sunny

    • 52
    • 69

    Partly Sunny

    • 52
    • 69

    Mostly Sunny

    • 54
    • 71

    Mostly Sunny

Today 21 Dec Coastal Glynn

Areas of fog this morning. Mostly sunny. Highs in the mid 60s. Northwest Winds around 5 Mph, becoming northeast this afternoon.

Tonight 21 Dec Coastal Glynn

Mostly clear. Lows in the upper 40s. Northeast Winds 10 to 15 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

    53.8 °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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