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

Miami, Miami International Airport (KMIA)

Lat: 25.79°NLon: 80.32°WElev: 10ft.

Light Rain

83°F

28°C

Humidity 67%
Wind Speed E 13 mph
Barometer 30.13 in (1020.3 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 9 Sep 11:53 am EDT
Extended Forecast for

Key Biscayne FL

  • Today

    Today: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. Heat index values as high as 104. East wind around 11 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms. Partly cloudy, with a low around 84. East wind around 14 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 84 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before 4pm. Partly sunny, with a high near 88. Heat index values as high as 106. Southeast wind 9 to 11 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 88 °F

    Showers
    Likely then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly between 7pm and 8pm. Partly cloudy, with a low around 83. Southeast wind 8 to 11 mph. Chance of precipitation is 60%.

    Low: 83 °F

    T-storms
    Likely then
    Slight Chance
    T-storms

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Southeast wind around 9 mph. Chance of precipitation is 60%.

    High: 88 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83. East wind 8 to 14 mph.

    Low: 83 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms. High near 88. East wind around 11 mph. Chance of precipitation is 80%.

    High: 88 °F

    T-storms

  • Saturday Night

    Saturday Night: Showers and thunderstorms, mainly before 8pm. Low around 83. Southeast wind 10 to 14 mph. Chance of precipitation is 80%.

    Low: 83 °F

    T-storms then
    Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely. Mostly sunny, with a high near 88. Southeast wind 9 to 11 mph. Chance of precipitation is 70%.

    High: 88 °F

    T-storms
    Likely

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. Heat index values as high as 104. East wind around 11 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms. Partly cloudy, with a low around 84. East wind around 14 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and thunderstorms likely, mainly before 4pm. Partly sunny, with a high near 88. Heat index values as high as 106. Southeast wind 9 to 11 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and thunderstorms likely, mainly between 7pm and 8pm. Partly cloudy, with a low around 83. Southeast wind 8 to 11 mph. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Southeast wind around 9 mph. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83. East wind 8 to 14 mph.
Saturday
Showers and thunderstorms. High near 88. East wind around 11 mph. Chance of precipitation is 80%.
Saturday Night
Showers and thunderstorms, mainly before 8pm. Low around 83. Southeast wind 10 to 14 mph. Chance of precipitation is 80%.
Sunday
Showers and thunderstorms likely. Mostly sunny, with a high near 88. Southeast wind 9 to 11 mph. Chance of precipitation is 70%.
Sunday Night
A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 82.
Monday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83.
Tuesday
Showers and thunderstorms likely. Mostly sunny, with a high near 88. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Key Biscayne FL
 25.69°N 80.17°W
Last Update:
4:36 am EDT Sep 9, 2026
Forecast Valid:
11am EDT Sep 9, 2026-6pm EDT Sep 15, 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