Severe Thunderstorms for the Center of the Nation; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

A round of severe thunderstorms are forecast across areas of the Southern Plains, Mississippi Valley and Great Lakes this afternoon and tonight; The threat for flash flooding will also accompany these storms. The rainfall for the Great Lakes region could prolong the ongoing flooding. Where the rain is needed, the Southern High Plains, critical fire weather concerns through today. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Partly Cloudy

77°F

25°C

Humidity 82%
Wind Speed E 9 mph
Barometer 29.97 in (1014.9 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 18 Apr 1:53 am EDT
Extended Forecast for

Key Colony Beach FL

  • Overnight

    Overnight: A slight chance of showers.  Mostly cloudy, with a low around 74. East wind around 10 mph.  Chance of precipitation is 10%.

    Low: 74 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 80. East wind around 10 mph.

    High: 80 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers.  Partly cloudy, with a low around 75. East wind around 10 mph.  Chance of precipitation is 10%.

    Low: 75 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 81. East wind around 5 mph.

    High: 81 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers.  Mostly cloudy, with a low around 74. North wind around 5 mph.  Chance of precipitation is 10%.

    Low: 74 °F

    Slight Chance
    Showers

  • Monday

    Monday: A slight chance of showers.  Partly sunny, with a high near 81. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 72. Breezy.  Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    Showers and
    Breezy

  • Tuesday

    Tuesday: A slight chance of showers.  Mostly sunny, with a high near 77. Windy.  Chance of precipitation is 20%.

    High: 77 °F

    Slight Chance
    Showers and
    Windy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 71. Windy.

    Low: 71 °F

    Partly Cloudy
    and Windy

Detailed Forecast

Overnight
A slight chance of showers. Mostly cloudy, with a low around 74. East wind around 10 mph. Chance of precipitation is 10%.
Saturday
Mostly sunny, with a high near 80. East wind around 10 mph.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 75. East wind around 10 mph. Chance of precipitation is 10%.
Sunday
Partly sunny, with a high near 81. East wind around 5 mph.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 74. North wind around 5 mph. Chance of precipitation is 10%.
Monday
A slight chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 20%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Breezy. Chance of precipitation is 30%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 77. Windy. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 71. Windy.
Wednesday
Mostly sunny, with a high near 77. Windy.
Wednesday Night
Mostly cloudy, with a low around 71. Breezy.
Thursday
A slight chance of showers. Partly sunny, with a high near 77. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 73. Chance of precipitation is 10%.
Friday
Mostly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
2:15 am EDT Apr 18, 2026
2am EDT Apr 18, 2026-6pm EDT Apr 24, 2026
 
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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