Grand Isle State Park Weather Forecast

    • 78
    • 83

    Partly Sunny

    • 79
    • 83

    Mostly Sunny

    • 79
    • 84

    Partly Sunny

    • 78
    • 84

    Partly Sunny

    • 77
    • 84

    Partly Sunny

    • 77
    • 84

    Partly Sunny

Today 24 May Coastal Jefferson

Mostly sunny. Humid with Highs in the mid 80s. South Winds 10 to 15 Mph.

Tonight 24 May Coastal Jefferson

Partly cloudy in the Evening, then becoming mostly cloudy. Humid with Lows in the mid 70s. South Winds 5 to 10 Mph.

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Grand Isle State Park Temperature Statistics

May Temperature

Port Fourchon (17.4 miles)

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Climate (2019–Present)

Port Fourchon (17.4 miles)

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  • Average Low 2019–2020

    71.3 °F
  • Average 2019–2020

    75.5 °F
  • Average High 2019–2020

    79.4 °F
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