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      Marine Weather Statement
      until 7:45 PM EDT
      Elev 10 ft, 24.727 °N 81.064 °W

      Marathon, FL

      The Florida Keys Marathon Airport Station81°
      Updated: 6:57 PM EDT on September 20, 2026 (GMT -4)
      7 minutes ago
      89°
      74°
      81
      Feels Like 86
      Thunder
      N
      0
      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
        Sun 09/20
        Low 78°f
         58% Precip. / 0.84 in
        Variably cloudy with scattered thunderstorms. Low 78F. Winds SSW at 5 to 10 mph. Chance of rain 60%.
        Tomorrow
        Mon 09/21
        High 85°f
         56% Precip. / 0.67 in
        Scattered showers and thunderstorms. High around 85F. Winds SSW at 5 to 10 mph. Chance of rain 60%.
        Tomorrow night
        Mon 09/21
        Low 80°f
         43% Precip. / 0.28 in
        Variable clouds with scattered thunderstorms. Low near 80F. Winds S at 10 to 15 mph. Chance of rain 40%.
        Hourly Forecast
        Now
        79°
        7PM
        58%
        80°
        7:22PM
        Sunset
        8PM
        58%
        80°
        9PM
        80°
        10PM
        82°
        11PM
        53%
        82°
        12AM
        58%
        81°
        1AM
        48%
        81°
        2AM
        81°
        3AM
        82°
        4AM
        82°
        5AM
        81°
        6AM
        81°
        7AM
        82°
        7:12AM
        Sunrise
        8AM
        47%
        82°
        9AM
        44%
        83°
        10AM
        39%
        84°
        11AM
        31%
        84°
        12PM
        54%
        84°
        1PM
        56%
        84°
        2PM
        43%
        84°
        3PM
        84°
        4PM
        85°
        5PM
        84°
        6PM
        84°
        Precipitation
        58%
        Storms continuing through 1 AM
        Pollen
        None
        Air Quality
        33
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.88 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point73°F
        5. Humidity 82%
        6. Rainfall 0.11 in
        7. Snow Depth 0 in
         KMTH Station History
        Almanac for
        1. Forecast Average Record
        2. Temperature
        3. High 89°F -°F -°F
        4. Low 74°F -°F -°F
        5. Rain/Snow Depth
        6. Precipitation 0.84 in - in -
        7. Snow 0 in - in -
        Almanac for
        1. Forecast Average Record
        2. Temperature
        3. High 85°F -°F -°F
        4. Low 74°F -°F -°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:12 AM 7:22 PM
        3. Civil Twilight 6:49 AM 7:45 PM
        4. Nautical Twilight 6:22 AM 8:11PM
        5. Astronomical Twilight 5:56 AM 8:38 PM
        1. Length of Visible Light 12h 55m
        2. Length of Day 12h 10m
        3. Tomorrow will be 1 minute 26 seconds shorter
        1. Moon 3:41 PM 1:28 AM
        2. Waxing Gibbous68% of the Moon is Illuminated
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Precipitation
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