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

Prolonged Extreme Cold; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the Gulf Coast, upper Ohio Valley, Mid-Atlantic, and Southeast U.S. into this weekend. A rapidly deepening storm centered just off the North Carolina coast Friday night through Saturday night will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Key Colony Beach FL

  • This Afternoon

    This Afternoon: A chance of showers. Partly sunny, with a high near 66. North wind around 10 mph. Chance of precipitation is 40%.

    High: 66 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 60. North wind around 10 mph.

    Low: 60 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers. Partly sunny, with a high near 65. Windy, with a southwest wind 10 to 15 mph becoming northwest 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 50%.

    High: 65 °F

    Chance
    Showers and
    Windy

  • Saturday Night

    Saturday Night: A slight chance of showers. Mostly cloudy, with a low around 44. Wind chill values as low as 37. Very windy, with a northwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 20%.

    Low: 44 °F

    Slight Chance
    Showers and
    Very Windy

  • Sunday

    Sunday: Partly sunny, with a high near 54. Windy, with a north wind 20 to 25 mph, with gusts as high as 35 mph.

    High: 54 °F

    Partly Sunny
    and Windy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 44. Breezy.

    Low: 44 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Monday

    Monday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of showers. Partly sunny, with a high near 66. North wind around 10 mph. Chance of precipitation is 40%.
Tonight
Mostly cloudy, with a low around 60. North wind around 10 mph.
Saturday
A chance of showers. Partly sunny, with a high near 65. Windy, with a southwest wind 10 to 15 mph becoming northwest 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 50%.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 44. Wind chill values as low as 37. Very windy, with a northwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 20%.
Sunday
Partly sunny, with a high near 54. Windy, with a north wind 20 to 25 mph, with gusts as high as 35 mph.
Sunday Night
Partly cloudy, with a low around 44. Breezy.
Monday
Sunny, with a high near 57.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Mostly sunny, with a high near 62.
Tuesday Night
Mostly cloudy, with a low around 58.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 66. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 60. Chance of precipitation is 10%.
Thursday
A slight chance of showers. Mostly sunny, with a high near 65. Breezy. Chance of precipitation is 10%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
Last Update:
12:22 pm EST Jan 30, 2026
Forecast Valid:
1pm EST Jan 30, 2026-6pm EST Feb 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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