Saint Simons Island Weather Forecast

    • 74
    • 83

    Chance Rain Showers

    • 73
    • 88

    Thunderstorms Likely

    • 74
    • 83

    Rain Showers

    • 74
    • 85

    Chance Thunderstorms

    • 73
    • 87

    Chance Thunderstorms

    • 73
    • 83

    Chance Rain Showers

Today 29 May Coastal Glynn

Mostly cloudy with a slight chance of Thunderstorms. A slight chance of Showers Early, then a chance of Showers. Highs in the mid 80s. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 29 May Coastal Glynn

Cloudy with a chance of Showers with a slight chance of Thunderstorms. Lows in the lower 70s. East Winds 5 to 10 Mph, becoming west after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Simons Island Temperature Statistics

May Temperature

Brunswick, Malcolm McKinnon Airport (0.6 miles)

  • Lowest 4 May, 2026

    55.4 °F

  • Average May

    75.1 °F

  • Highest 11 May, 2026

    91.4 °F

Climate (2021–Present)

Brunswick, Malcolm McKinnon Airport (0.6 miles)

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  • Average Low 2021–2026

    63 °F

  • Average 2021–2026

    70.2 °F

  • Average High 2021–2026

    78 °F
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