Grand Isle Weather Forecast

    • 58
    • 66

    Chance Rain Showers

    • 52
    • 64

    Slight Chance Thunderstorms

    • 54
    • 59

    Partly Sunny

    • 57
    • 62

    Mostly Sunny

    • 59
    • 64

    Mostly Cloudy

    • 59
    • 64

    Mostly Cloudy

    • 62
    • 66

    Partly Sunny

Today 30 Jan Coastal Jefferson

Partly sunny late this Morning, then becoming mostly cloudy. Near steady temperature in the upper 60s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 30 Jan Coastal Jefferson

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms after midnight. Patchy fog after midnight. Near steady temperature in the lower 60s. South Winds 10 to 15 Mph. Chance of rain 40 percent.

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Grand Isle Temperature Statistics

January 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

    72.4 °F

  • Average 2020–2020

    76.4 °F

  • Average High 2020–2020

    80.2 °F
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