Grand Isle SPB Weather Forecast

    • 71
    • 76

    Mostly Sunny

    • 71
    • 76

    Mostly Sunny

    • 64
    • 77

    Slight Chance Thunderstorms

    • 65
    • 73

    Slight Chance Thunderstorms

    • 68
    • 72

    Mostly Cloudy

    • 68
    • 74

    Mostly Cloudy

    • 69
    • 74

    Slight Chance Rain Showers

Today 16 Apr Coastal Jefferson

Sunny. Highs around 80. Southeast Winds 5 to 10 Mph.

Tonight 16 Apr Coastal Jefferson

Mostly clear. Lows in the upper 60s. South Winds 5 to 10 Mph.

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Grand Isle SPB Temperature Statistics

April Temperature

Port Fourchon (17.4 miles)

  • Lowest

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  • Average April

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  • Highest

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Climate (–Present)

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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