Grand Isle Weather Forecast

    • 62
    • 78

    Partly Sunny

    • 65
    • 78

    Partly Sunny

    • 59
    • 77

    Mostly Sunny

    • 60
    • 77

    Mostly Sunny

    • 57
    • 77

    Mostly Sunny

    • 56
    • 78

    Mostly Sunny

    • 59
    • 78

    Mostly Sunny

Today 21 Dec Mainland Southern Brevard

Partly sunny. Highs in the upper 70s. Northeast Winds 5 to 10 Mph.

Tonight 21 Dec Mainland Southern Brevard

Partly cloudy. Lows in the mid 60s. North Winds 5 to 10 Mph increasing to 10 to 15 Mph after midnight.

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Grand Isle Temperature Statistics

December Temperature

Cocoa - Patrick Air Force Base (6.2 miles)

  • Lowest 12 December, 2025

    54.5 °F

  • Average December

    69.3 °F

  • Highest 5 December, 2025

    83.8 °F

Climate (2020–Present)

Cocoa - Patrick Air Force Base (6.2 miles)

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  • Average Low 2020–2025

    69.9 °F

  • Average 2020–2025

    75.1 °F

  • Average High 2020–2025

    81.2 °F
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