Grand Isle State Park Weather Forecast

    • 81
    • 89

    Rain Showers

    • 80
    • 88

    Thunderstorms Likely

    • 82
    • 87

    Chance Thunderstorms

    • 83
    • 89

    Chance Thunderstorms

    • 83
    • 89

    Chance Thunderstorms

Today 12 Jul Coastal Jefferson

Thunderstorms likely. A chance of Showers in the Morning, then Showers likely in the afternoon. Humid with Highs in the lower 90s. Southwest Winds 5 to 10 Mph. Chance of rain 70 percent. Heat index Values up to 106.

Tonight 12 Jul Coastal Jefferson

Mostly cloudy with a chance of Showers and Thunderstorms. Humid with Lows in the mid 70s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

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Grand Isle State Park Temperature Statistics

July Temperature

Port Fourchon (17.4 miles)

  • Lowest

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  • Average July

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Climate (–)

Port Fourchon (17.4 miles)

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  • Average Low –

    71.6 °F

  • Average –

    72.5 °F

  • Average High –

    75.2 °F
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