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

Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather from the Southern Plains to the Great Lakes

Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, thunderstorms, and coastal impacts to the Marianas Islands into Wednesday. Typhoon conditions are likely over CNMI and tropical storm conditions over Guam. Severe thunderstorms and heavy rain are expected from the Southern Plains to the Great Lakes today. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

80°F

27°C

Humidity 54%
Wind Speed E 16 mph
Barometer 30.08 in (1018.6 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 14 Apr 4:53 pm EDT
Extended Forecast for

Key Colony Beach FL

  • This Afternoon

    This Afternoon: A slight chance of showers. Mostly sunny, with a high near 79. East wind around 15 mph. Chance of precipitation is 10%.

    High: 79 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers. Partly cloudy, with a low around 72. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 10%.

    Low: 72 °F

    Slight Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: A slight chance of showers. Mostly sunny, with a high near 78. East wind around 15 mph. Chance of precipitation is 10%.

    High: 78 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers. Mostly clear, with a low around 73. East wind around 15 mph. Chance of precipitation is 10%.

    Low: 73 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 79. East wind 10 to 15 mph.

    High: 79 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers. Mostly clear, with a low around 75. Chance of precipitation is 10%.

    Low: 75 °F

    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers. Sunny, with a high near 81. Chance of precipitation is 10%.

    High: 81 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of showers. Mostly sunny, with a high near 79. East wind around 15 mph. Chance of precipitation is 10%.
Tonight
A slight chance of showers. Partly cloudy, with a low around 72. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 10%.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 78. East wind around 15 mph. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers. Mostly clear, with a low around 73. East wind around 15 mph. Chance of precipitation is 10%.
Thursday
Mostly sunny, with a high near 79. East wind 10 to 15 mph.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 75. Chance of precipitation is 10%.
Friday
A slight chance of showers. Sunny, with a high near 81. Chance of precipitation is 10%.
Friday Night
Mostly clear, with a low around 76.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 76.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 75.
Monday
Mostly sunny, with a high near 81.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 73. Chance of precipitation is 20%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 79. Windy. Chance of precipitation is 20%.
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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:
4:15 pm EDT Apr 14, 2026
Forecast Valid:
5pm EDT Apr 14, 2026-6pm EDT Apr 21, 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