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Flooding Risks from Tropical Moisture Across the Intermountain West and East Coast

Tropical moisture from Isaias and Rachel will impact portions of the Intermountain West and East Coast states. Flooding, gusty winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, record warmth will spread northward across the Mississippi Valley the next few days. Looking for snow, the first winter storm of the season is underway across the northern Rockies. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

A Few Clouds

87°F

31°C

Humidity 75%
Wind Speed SE 8 mph
Barometer 30.11 in (1019.4 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 11 Oct 10:53 am EDT
Extended Forecast for

Key Colony Beach FL

  • Today

    Today: A slight chance of showers and thunderstorms. Sunny, with a high near 90. Southeast wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms. Mostly clear, with a low around 83. East wind around 10 mph. Chance of precipitation is 10%.

    Low: 83 °F

    Slight Chance
    T-storms

  • Columbus Day

    Columbus Day: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Northeast wind around 10 mph. Chance of precipitation is 30%.

    Low: 80 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers. Sunny, with a high near 88. Northeast wind 10 to 15 mph. Chance of precipitation is 10%.

    High: 88 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly clear, with a low around 79. Chance of precipitation is 10%.

    Low: 79 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms. Sunny, with a high near 87. Chance of precipitation is 20%.

    High: 87 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 80. Chance of precipitation is 40%.

    Low: 80 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 40%.

    High: 86 °F

    Chance
    T-storms

Detailed Forecast

Today
A slight chance of showers and thunderstorms. Sunny, with a high near 90. Southeast wind 5 to 10 mph. Chance of precipitation is 20%.
Tonight
A slight chance of showers and thunderstorms. Mostly clear, with a low around 83. East wind around 10 mph. Chance of precipitation is 10%.
Columbus Day
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Northeast wind around 10 mph. Chance of precipitation is 30%.
Tuesday
A slight chance of showers. Sunny, with a high near 88. Northeast wind 10 to 15 mph. Chance of precipitation is 10%.
Tuesday Night
A slight chance of showers. Mostly clear, with a low around 79. Chance of precipitation is 10%.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 87. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 80. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 50%.
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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:
11:15 am EDT Oct 11, 2026
Forecast Valid:
11am EDT Oct 11, 2026-6pm EDT Oct 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