Bay St Louis - Bayou Portage Entrance Weather Forecast

    • 81
    • 90

    Chance Thunderstorms

    • 80
    • 90

    Chance Thunderstorms

    • 80
    • 87

    Rain Showers

    • 79
    • 89

    Thunderstorms Likely

    • 77
    • 89

    Thunderstorms Likely

    • 77
    • 89

    Thunderstorms Likely

Today 23 Aug Southern Harrison

Mostly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the mid 90s. South Winds 5 to 10 Mph. Chance of rain 30 percent. Heat index Values up to 110.

Tonight 23 Aug Southern Harrison

Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Humid with Lows in the upper 70s. Southwest Winds 5 to 10 Mph, becoming west after midnight. Chance of rain 30 percent.

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Bay St Louis - Bayou Portage Entrance Temperature Statistics

August Temperature

Bay St. Louis, Stennis International Airport (11.2 miles)

  • Lowest 4 August, 2026

    69.8 °F

  • Average August

    86.9 °F

  • Highest 18 August, 2026

    96.8 °F

Climate (2021–2026)

Bay St. Louis, Stennis International Airport (11.2 miles)

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  • Average Low 2021–2026

    60.4 °F

  • Average 2021–2026

    71.7 °F

  • Average High 2021–2026

    78.5 °F
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