Grand Isle Weather Forecast

    • 78
    • 91

    Chance Thunderstorms

    • 78
    • 91

    Chance Thunderstorms

    • 78
    • 90

    Thunderstorms Likely

    • 78
    • 90

    Chance Thunderstorms

    • 78
    • 88

    Chance Thunderstorms

    • 77
    • 89

    Chance Thunderstorms

Today 29 Aug Mainland Southern Brevard

Partly sunny with a chance of Showers and Thunderstorms. Highs around 90. East Winds 10 to 15 Mph. Chance of rain 40 percent. Heat index Values up to 105.

Tonight 29 Aug Mainland Southern Brevard

Partly cloudy. A slight chance of Showers and Thunderstorms through early Morning, then a chance of Showers and Thunderstorms late. Lows in the upper 70s. East Winds 5 to 10 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand Isle Temperature Statistics

August Temperature

Cocoa - Patrick Air Force Base (6.2 miles)

  • Lowest 6 August, 2026

    76.6 °F

  • Average August

    83.9 °F

  • Highest 18 August, 2026

    97 °F

Climate (2021–2026)

Cocoa - Patrick Air Force Base (6.2 miles)

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  • Average Low 2021–2026

    70 °F

  • Average 2021–2026

    75.2 °F

  • Average High 2021–2026

    81.3 °F
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