Grand Isle Weather Forecast

    • 71
    • 86

    Rain Showers Likely

    • 71
    • 85

    Mostly Sunny

    • 76
    • 86

    Mostly Sunny

    • 75
    • 86

    Slight Chance Thunderstorms

    • 77
    • 85

    Partly Sunny

    • 77
    • 85

    Slight Chance Thunderstorms

Today 13 May Mainland Southern Brevard

Partly sunny with Showers likely and a chance of Thunderstorms. Highs in the mid 80s. West Winds 5 to 10 Mph becoming north late in the afternoon and towards Sunset. Chance of rain 70 percent.

Tonight 13 May Mainland Southern Brevard

Partly cloudy. A chance of Showers and Thunderstorms in the late evening and early morning. Lows in the lower 70s. Northwest Winds around 5 Mph. Chance of rain 30 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand Isle Temperature Statistics

May Temperature

Cocoa - Patrick Air Force Base (6.2 miles)

  • Lowest 7 May, 2026

    71.1 °F

  • Average May

    79 °F

  • Highest 10 May, 2026

    91.8 °F

Climate (2021–Present)

Cocoa - Patrick Air Force Base (6.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    69.8 °F

  • Average 2021–2026

    75 °F

  • Average High 2021–2026

    81.2 °F
Get WillyWeather+ to remove ads