Grand Isle (Outside) Weather Forecast

    • 77
    • 80

    Chance Thunderstorms

    • 76
    • 81

    Chance Rain Showers

    • 73
    • 78

    Chance Thunderstorms

    • 71
    • 78

    Partly Sunny

    • 72
    • 78

    Partly Sunny

    • 67
    • 79

    Partly Sunny

    • 66
    • 74

    Mostly Sunny

Today 8 Nov Coastal Jefferson

Mostly cloudy. Isolated Showers late this Morning, then scattered Showers this afternoon. Near steady temperature in the upper 70s. East Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 40 percent.

Tonight 8 Nov Coastal Jefferson

Cloudy. A slight chance of Showers and Thunderstorms this evening. Near steady temperature in the mid 70s. East Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

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Grand Isle (Outside) Temperature Statistics

November Temperature

Port Fourchon (18 miles)

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  • Average November

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Climate (2019–Present)

Port Fourchon (18 miles)

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  • Average Low 2019–2020

    68.1 °F
  • Average 2019–2020

    72.3 °F
  • Average High 2019–2020

    76.5 °F
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