Saint Simons Island Weather Forecast

    • 55
    • 64

    Chance Rain Showers

    • 59
    • 69

    Rain Showers Likely

    • 43
    • 68

    Mostly Sunny

    • 47
    • 64

    Mostly Sunny

    • 51
    • 68

    Mostly Sunny

    • 51
    • 62

    Partly Sunny

Today 17 Dec Coastal Glynn

Partly sunny this Morning, then becoming mostly cloudy. Highs in the mid 60s. Northeast Winds 5 to 10 Mph.

Tonight 17 Dec Coastal Glynn

Cloudy. A slight chance of Showers after midnight. Not as cool with Lows in the lower 50s. Northeast Winds around 5 Mph. Chance of rain 20 percent.

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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

    53.7 °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

    62.9 °F

  • Average 2020–2025

    70.2 °F

  • Average High 2020–2025

    77.9 °F
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