Grand Isle Weather Forecast

    • 72
    • 86

    Chance Thunderstorms

    • 73
    • 86

    Chance Thunderstorms

    • 73
    • 87

    Chance Thunderstorms

    • 74
    • 88

    Chance Rain Showers

    • 75
    • 88

    Rain Showers Likely

    • 75
    • 86

    Thunderstorms Likely

    • 74
    • 86

    Thunderstorms Likely

Today 13 Sep Mainland Southern Brevard

Partly cloudy with a chance of Showers and Thunderstorms. Highs in the mid 80s. North Winds 10 to 15 Mph. Chance of rain 50 percent.

Tonight 13 Sep Mainland Southern Brevard

Partly cloudy. A chance of Showers and Thunderstorms through early Morning, then a slight chance of Showers and Thunderstorms late. Lows in the lower 70s. North Winds 10 to 15 Mph becoming northwest 5 to 10 Mph in the late evening and overnight. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand Isle Temperature Statistics

September Temperature

Cocoa - Patrick Air Force Base (6.2 miles)

  • Lowest 9 September, 2025

    75.7 °F

  • Average September

    81.9 °F

  • Highest 7 September, 2025

    88 °F

Climate (2020–Present)

Cocoa - Patrick Air Force Base (6.2 miles)

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  • Average Low 2020–2025

    70 °F

  • Average 2020–2025

    75.1 °F

  • Average High 2020–2025

    81.2 °F
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