Key Biscayne Weather Forecast

    • 82
    • 85

    Mostly Sunny

    • 82
    • 85

    Slight Chance Thunderstorms

    • 82
    • 85

    Chance Rain Showers

    • 82
    • 85

    Slight Chance Thunderstorms

    • 82
    • 85

    Chance Rain Showers

    • 82
    • 85

    Chance Thunderstorms

    • 81
    • 84

    Chance Thunderstorms

Today 21 May Coastal Miami Dade County

Sunny. Highs in the upper 80s. East Winds 10 to 15 Mph.

Tonight 21 May Coastal Miami Dade County

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 70s. East Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Key Biscayne Temperature Statistics

May Temperature

Miami, Miami International Airport (11.2 miles)

  • Lowest 4 May, 2026

    71.7 °F

  • Average May

    82.6 °F

  • Highest 14 May, 2026

    95.6 °F

Climate (2021–Present)

Miami, Miami International Airport (11.2 miles)

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  • Average Low 2021–2026

    72.5 °F

  • Average 2021–2026

    78.5 °F

  • Average High 2021–2026

    85.5 °F
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