National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

78°F

26°C

Humidity 48%
Wind Speed NE 15 G 28 mph
Barometer 30.18 in (1021.9 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 11 Apr 11:53 am EDT
Extended Forecast for

Key Colony Beach FL

  • This Afternoon

    This Afternoon: Sunny, with a high near 79. East wind around 15 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers. Mostly clear, with a low around 72. East wind around 15 mph. Chance of precipitation is 10%.

    Low: 72 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers. Sunny, with a high near 79. East wind around 15 mph. Chance of precipitation is 10%.

    High: 79 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers. Partly cloudy, with a low around 73. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 10%.

    Low: 73 °F

    Slight Chance
    Showers and
    Breezy

  • Monday

    Monday: A slight chance of showers. Sunny, with a high near 80. East wind around 15 mph. Chance of precipitation is 10%.

    High: 80 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers. Mostly cloudy, with a low around 74. Chance of precipitation is 10%.

    Low: 74 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 10%.

    High: 80 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 74. Windy.

    Low: 74 °F

    Partly Cloudy
    and Windy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 79. East wind around 15 mph.
Tonight
A slight chance of showers. Mostly clear, with a low around 72. East wind around 15 mph. Chance of precipitation is 10%.
Sunday
A slight chance of showers. Sunny, with a high near 79. East wind around 15 mph. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 73. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 10%.
Monday
A slight chance of showers. Sunny, with a high near 80. East wind around 15 mph. Chance of precipitation is 10%.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 74. Chance of precipitation is 10%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 10%.
Tuesday Night
Partly cloudy, with a low around 74. Windy.
Wednesday
Mostly sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 74. Breezy.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 75.
Friday
Sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
Last Update:
12:15 pm EDT Apr 11, 2026
Forecast Valid:
12pm EDT Apr 11, 2026-6pm EDT Apr 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation