St Marys Beach Weather Forecast

    • 50
    • 51

    Chance Rain Showers

    • 57
    • 62

    Mostly Cloudy

    • 45
    • 67

    Mostly Sunny

    • 44
    • 54

    Mostly Sunny

    • 51
    • 58

    Mostly Sunny

    • 54
    • 68

    Mostly Sunny

Today 5 Dec Coastal Harris

Cloudy with a 40 percent chance of Showers. Highs in the lower 50s. North Winds 5 to 10 Mph.

Tonight 5 Dec Coastal Harris

Mostly cloudy. Near steady temperature in the upper 40s. East Winds around 5 Mph, becoming north after midnight.

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St Marys Beach Temperature Statistics

December Temperature

Houston / Ellington (13 miles)

  • Lowest 2 December, 2025

    39.2 °F

  • Average December

    45.3 °F

  • Highest 2 December, 2025

    55.4 °F

Climate (2020–Present)

Houston / Ellington (13 miles)

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  • Average Low 2020–2025

    63.8 °F

  • Average 2020–2025

    71.5 °F

  • Average High 2020–2025

    79.9 °F
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