Grand Isle Weather Forecast

    • 78
    • 94

    Mostly Sunny

    • 78
    • 95

    Slight Chance Thunderstorms

    • 79
    • 96

    Slight Chance Thunderstorms

    • 79
    • 96

    Chance Thunderstorms

    • 79
    • 93

    Chance Thunderstorms

    • 78
    • 92

    Chance Thunderstorms

Today 15 Aug Mainland Southern Brevard

Mostly sunny. A slight chance of Showers and Thunderstorms late in the afternoon and towards Sunset. Highs in the lower 90s. Southeast Winds 5 to 10 Mph increasing to 10 to 15 Mph late in the afternoon and towards Sunset. Chance of rain 20 percent. Heat index Values up to 109.

Tonight 15 Aug Mainland Southern Brevard

Mostly clear. Lows in the upper 70s. South Winds around 5 Mph.

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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

    82.9 °F

  • Highest 12 August, 2026

    93.9 °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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