Grand Isle SPB Weather Forecast

    • 82
    • 91

    Mostly Sunny

    • 81
    • 88

    Chance Thunderstorms

    • 82
    • 87

    Chance Thunderstorms

    • 81
    • 87

    Chance Thunderstorms

    • 82
    • 89

    Rain Showers Likely

    • 82
    • 88

    Thunderstorms Likely

    • 83
    • 88

    Thunderstorms Likely

Today 5 Jul Coastal Jefferson

Sunny with a slight chance of Showers and Thunderstorms. Near steady temperature in the upper 80s. East Winds around 5 Mph. Chance of rain 20 percent.

Tonight 5 Jul Coastal Jefferson

Mostly clear. Humid with Lows in the upper 70s. South Winds around 5 Mph, becoming northwest after midnight.

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Grand Isle SPB Temperature Statistics

July Temperature

Port Fourchon (17.4 miles)

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  • Average July

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Climate (2020–Present)

Port Fourchon (17.4 miles)

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  • Average Low 2020–2020

    79.8 °F

  • Average 2020–2020

    83.5 °F

  • Average High 2020–2020

    86.9 °F
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