Cat Bay Weather Forecast

    • 77
    • 86

    Mostly Sunny

    • 77
    • 86

    Mostly Sunny

    • 78
    • 86

    Mostly Sunny

    • 78
    • 88

    Mostly Sunny

    • 77
    • 87

    Slight Chance Thunderstorms

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    • 86

    Chance Thunderstorms

Today 17 Sep Lower Plaquemines

Sunny. Highs in the upper 80s. Northeast Winds 5 to 10 Mph, becoming east in the afternoon.

Tonight 17 Sep Lower Plaquemines

Clear. Near steady temperature in the upper 70s. Northeast Winds around 5 Mph.

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Cat Bay Temperature Statistics

September Temperature

Galliano, South Lafourche Airport (23 miles)

  • Lowest 3 September, 2025

    64.9 °F

  • Average September

    79.6 °F

  • Highest 12 September, 2025

    90.3 °F

Climate (2020–Present)

Galliano, South Lafourche Airport (23 miles)

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  • Average Low 2020–2025

    64.4 °F

  • Average 2020–2025

    72.2 °F

  • Average High 2020–2025

    79.7 °F
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