Spanish Harbor - Big Pine Key Weather Forecast

    • 65
    • 75

    Rain Showers Likely

    • 67
    • 74

    Chance Rain Showers

    • 67
    • 76

    Chance Rain Showers

    • 69
    • 75

    Mostly Sunny

    • 71
    • 76

    Mostly Sunny

    • 71
    • 77

    Mostly Sunny

Today 17 Mar Monroe Lower Keys

Cloudy with a chance of Showers and a slight chance of Thunderstorms. Becoming breezy. Highs in the mid 70s. Northwest to north Winds near 15 Mph, becoming north to northeast 15 to 20 Mph. Chance of rain 40 percent.

Tonight 17 Mar Monroe Lower Keys

Cloudy with a chance of Showers and a slight chance of Thunderstorms. Windy with Lows in the mid 60s. Northeast Winds near 20 Mph. Chance of rain 40 percent.

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Spanish Harbor - Big Pine Key Temperature Statistics

March Temperature

The Florida Keys - Marathon International Airport (18 miles)

  • Lowest 1 March, 2026

    70.6 °F

  • Average March

    78.2 °F

  • Highest 6 March, 2026

    83.6 °F

Climate (2021–Present)

The Florida Keys - Marathon International Airport (18 miles)

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  • Average Low 2021–2026

    75.3 °F

  • Average 2021–2026

    80 °F

  • Average High 2021–2026

    85.1 °F
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