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      Elev 10 ft, 25.696 °N 80.168 °W

      Key Biscayne, FL

      Key Biscayne Station83°
      Updated: 9:54 PM EDT on September 11, 2026 (GMT -4)
      32 seconds ago
      89°
      79°
      83
      Feels Like 92
      Partly Cloudy
      N
      5
      Lower temperature is expected tomorrow
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Tonight
        Fri 09/11
        Low 83°f
         34% Precip. / 0.01 in
        Partly cloudy this evening followed by increasing clouds with showers developing after midnight. Low 83F. Winds SE at 10 to 15 mph. Chance of rain 30%.
        Tomorrow
        Sat 09/12
        High 86°f
         34% Precip. / 0.07 in
        Rain showers early with mostly cloudy conditions later in the day. High 86F. Winds SE at 5 to 10 mph. Chance of rain 30%.
        Tomorrow night
        Sat 09/12
        Low 81°f
         24% Precip. / 0 in
        Cloudy early with partial clearing expected late. Low 81F. Winds SSE at 5 to 10 mph.
        Hourly Forecast
        Now
        85°
        10PM
        85°
        11PM
        85°
        12AM
        84°
        1AM
        84°
        2AM
        84°
        3AM
        84°
        4AM
        39%
        84°
        5AM
        35%
        84°
        6AM
        84°
        7AM
        84°
        7:05AM
        Sunrise
        8AM
        84°
        9AM
        30%
        84°
        10AM
        35%
        84°
        11AM
        85°
        12PM
        85°
        1PM
        84°
        2PM
        84°
        3PM
        84°
        4PM
        84°
        5PM
        83°
        6PM
        45%
        82°
        7PM
        35%
        82°
        7:28PM
        Sunset
        8PM
        82°
        9PM
        82°
        Precipitation
        45%
        Thunderstorms possible after 4 AM
        Pollen
        None
        Air Quality
        40
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point77°F
        5. Humidity 77%
        6. Rainfall 0.82 in
        7. Snow Depth 0 in
         KMIA Station History
        Almanac for September 12, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 89°F 87°F 93°F 1978
        4. Low 79°F 77°F 70°F 1996
        5. Rain/Snow Depth
        6. Precipitation 0.01 in 3.3 in -
        7. Snow 0 in 0 in -
        Almanac for September 13, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 86°F 87°F 95°F
        4. Low 79°F 77°F 70°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:05 AM 7:27 PM
        3. Civil Twilight 6:42 AM 7:50 PM
        4. Nautical Twilight 6:15 AM 8:17PM
        5. Astronomical Twilight 5:48 AM 8:45 PM
        1. Length of Visible Light 13h 8m
        2. Length of Day 12h 22m
        3. Tomorrow will be 1 minute 29 seconds shorter
        1. Moon 8:26 AM 8:19 PM
        2. Waxing Crescent2% of the Moon is Illuminated
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Precipitation
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