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

Tropical Moisture Will Bring Heavy to Excessive Rainfall with Possible Flooding This Week

Tropical moisture from the remnants of Odalys and Hurricane Polo will surge over the southwest into the central U.S. this week with several days of heavy to excessive rainfall which may bring limited to considerable flooding. Flood Watches have been issued through Wednesday in the southwest U.S. and moderate risk outlooks have been issued today through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Overcast

85°F

29°C

Humidity 61%
Wind Speed SW 6 mph
Barometer 29.94 in (1013.7 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 28 Sep 4:53 pm EDT
Extended Forecast for

Islamorada FL

Coastal Flood Warning until September 29, 05:00am
Click here for hazard details and duration
Coastal Flood Warning
  •  
    Coastal Flood Warning until September 29, 05:00am

    NOW until 5:00am Tue

    Coastal Flood Warning

  • This Afternoon

    High: 85 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 79. Southwest wind around 5 mph. Chance of precipitation is 40%.

    Low: 79 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 86. South wind around 5 mph. Chance of precipitation is 50%.

    High: 86 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 79. East wind 5 to 10 mph. Chance of precipitation is 60%.

    Low: 79 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 84. East wind 10 to 15 mph. Chance of precipitation is 70%.

    High: 84 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 79. Chance of precipitation is 80%.

    Low: 79 °F

    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 87. Chance of precipitation is 70%.

    High: 87 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 81. Windy. Chance of precipitation is 70%.

    Low: 81 °F

    Showers
    Likely and
    Windy

Detailed Forecast

This Afternoon
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. Southwest wind around 5 mph. Chance of precipitation is 10%.
Tonight
A chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 79. Southwest wind around 5 mph. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 86. South wind around 5 mph. Chance of precipitation is 50%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 79. East wind 5 to 10 mph. Chance of precipitation is 60%.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 84. East wind 10 to 15 mph. Chance of precipitation is 70%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 79. Chance of precipitation is 80%.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 87. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 81. Windy. Chance of precipitation is 70%.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 87. Breezy. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 81. Breezy. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 40%.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 81. Chance of precipitation is 20%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Chance of precipitation is 40%.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islamorada FL
 24.93°N 80.64°W (Elev. 0 ft)
Last Update:
5:15 pm EDT Sep 28, 2026
Forecast Valid:
5pm EDT Sep 28, 2026-6pm EDT Oct 5, 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