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

Critical Fire Weather in the High Plains; Heat Continues in the West

Critical fire weather conditions will persist in the central High Plains through Friday as gusty winds and dry conditions continue. The heat wave across the West and Southwest will continue to intensify through the week, with daily and monthly record highs expected to be broken. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Overcast

66°F

19°C

Humidity 90%
Wind Speed N 13 G 31 mph
Barometer 29.97 in (1014.8 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 19 Mar 4:53 am EDT
Extended Forecast for

Key Colony Beach FL

  • Overnight

    Overnight: A chance of showers. Mostly cloudy, with a low around 67. Breezy, with a north wind around 20 mph. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    Showers and
    Breezy

  • Thursday

    Thursday: A chance of showers, mainly before 8am. Partly sunny, with a high near 74. Breezy, with a north wind 15 to 20 mph. Chance of precipitation is 30%.

    High: 74 °F

    Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: A slight chance of showers. Partly cloudy, with a low around 65. Breezy, with a north wind 15 to 20 mph. Chance of precipitation is 10%.

    Low: 65 °F

    Slight Chance
    Showers and
    Breezy

  • Friday

    Friday: A slight chance of showers. Mostly sunny, with a high near 73. Breezy, with a north wind 15 to 20 mph. Chance of precipitation is 10%.

    High: 73 °F

    Slight Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 66. Northeast wind around 15 mph.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of showers. Mostly cloudy, with a low around 67. Breezy, with a north wind around 20 mph. Chance of precipitation is 30%.
Thursday
A chance of showers, mainly before 8am. Partly sunny, with a high near 74. Breezy, with a north wind 15 to 20 mph. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 65. Breezy, with a north wind 15 to 20 mph. Chance of precipitation is 10%.
Friday
A slight chance of showers. Mostly sunny, with a high near 73. Breezy, with a north wind 15 to 20 mph. Chance of precipitation is 10%.
Friday Night
Mostly clear, with a low around 66. Northeast wind around 15 mph.
Saturday
Sunny, with a high near 75.
Saturday Night
Partly cloudy, with a low around 67.
Sunday
Sunny, with a high near 76.
Sunday Night
Mostly clear, with a low around 71.
Monday
Sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 70.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
A slight chance of showers. Sunny, with a high near 78. Chance of precipitation is 10%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
Last Update:
4:15 am EDT Mar 19, 2026
Forecast Valid:
5am EDT Mar 19, 2026-6pm EDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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