Grand Isle (Outside) Weather Forecast

    • 72
    • 76

    Increasing Clouds

    • 73
    • 76

    Mostly Cloudy

    • 72
    • 76

    Mostly Cloudy

    • 73
    • 76

    Chance Rain Showers

    • 72
    • 77

    Chance Thunderstorms

    • 73
    • 77

    Slight Chance Thunderstorms

    • 73
    • 77

    Slight Chance Thunderstorms

Today 18 Apr Coastal Jefferson

Sunny. Highs in the upper 70s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 18 Apr Coastal Jefferson

Partly cloudy this Evening, then becoming mostly cloudy. Lows around 70. Southeast Winds 10 to 15 Mph.

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Grand Isle (Outside) Temperature Statistics

April Temperature

Port Fourchon (18 miles)

  • Lowest

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  • Average April

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  • Highest

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Climate (2020–Present)

Port Fourchon (18 miles)

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  • Average Low 2020–2020

    77.4 °F

  • Average 2020–2020

    81.2 °F

  • Average High 2020–2020

    84.7 °F
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