Shell Island Lake Weather Forecast

    • 80
    • 83

    Mostly Sunny

    • 79
    • 83

    Sunny

    • 80
    • 83

    Mostly Sunny

    • 80
    • 84

    Mostly Sunny

    • 80
    • 84

    Partly Sunny

    • 79
    • 83

    Slight Chance Thunderstorms

Today 16 Sep Lower St. Bernard

Sunny. Highs in the upper 80s. East Winds 5 to 10 Mph.

Tonight 16 Sep Lower St. Bernard

Partly cloudy. Near steady temperature in the upper 70s. South Winds around 5 Mph.

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Shell Island Lake Temperature Statistics

September Temperature

Bay St. Louis, Stennis International Airport (30.4 miles)

  • Lowest 12 September, 2025

    64.4 °F

  • Average September

    83 °F

  • Highest 12 September, 2025

    93.2 °F

Climate (2020–Present)

Bay St. Louis, Stennis International Airport (30.4 miles)

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  • Average Low 2020–2025

    60 °F

  • Average 2020–2025

    71.1 °F

  • Average High 2020–2025

    77.9 °F
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