Big Spanish Channel - Mayo Key Weather Forecast

    • 82
    • 92

    Chance Thunderstorms

    • 82
    • 92

    Rain Showers Likely

    • 82
    • 92

    Rain Showers Likely

    • 81
    • 93

    Chance Thunderstorms

    • 81
    • 92

    Chance Thunderstorms

    • 82
    • 92

    Slight Chance Thunderstorms

    • 82
    • 93

    Slight Chance Thunderstorms

Today 5 Aug Monroe Lower Keys

Partly cloudy with a chance of Showers and Thunderstorms. Highs near 90. East Winds near 10 Mph. Chance of rain 50 percent. Heat index Values up to 108.

Tonight 5 Aug Monroe Lower Keys

Partly to mostly cloudy with a chance of Showers and Thunderstorms. Lows in the lower 80s. East Winds 5 to 10 Mph, increasing to 10 Mph. Chance of rain 40 percent.

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Big Spanish Channel - Mayo Key Temperature Statistics

August Temperature

The Florida Keys - Marathon International Airport (19.3 miles)

  • Lowest 3 August, 2026

    79 °F

  • Average August

    86.5 °F

  • Highest 1 August, 2026

    91.7 °F

Climate (2021–2026)

The Florida Keys - Marathon International Airport (19.3 miles)

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  • Average Low 2021–2026

    75.4 °F

  • Average 2021–2026

    80.1 °F

  • Average High 2021–2026

    85 °F
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