Grand Isle Weather Forecast

    • 82
    • 87

    Chance Thunderstorms

    • 82
    • 87

    Rain Showers

    • 81
    • 87

    Rain Showers

    • 81
    • 87

    Thunderstorms Likely

    • 82
    • 87

    Thunderstorms Likely

    • 82
    • 88

    Thunderstorms Likely

Today 27 Jun Coastal Jefferson

Mostly sunny with a chance of Showers and Thunderstorms. Humid with Highs in the upper 80s. North Winds around 5 Mph, becoming southeast in the afternoon. Chance of rain 40 percent.

Tonight 27 Jun Coastal Jefferson

Mostly clear. Near steady temperature around 80. Southeast Winds around 5 Mph.

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Grand Isle Temperature Statistics

June Temperature

Port Fourchon (14.9 miles)

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Climate (2020–Present)

Port Fourchon (14.9 miles)

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  • Average Low 2020–2020

    79.9 °F

  • Average 2020–2020

    83.6 °F

  • Average High 2020–2020

    86.9 °F
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