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.

Partly Cloudy

83°F

28°C

Humidity 85%
Wind Speed E 6 mph
Barometer 30.03 in (1016.7 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 10 Sep 2:53 am EDT
Extended Forecast for

Key Biscayne FL

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 83. East wind around 14 mph.

    Low: 83 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly before 5pm. Mostly sunny, with a high near 88. Heat index values as high as 106. Southeast 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

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 83. East wind 8 to 13 mph. Chance of precipitation is 20%.

    Low: 83 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms likely, mainly before 4pm. Mostly sunny, with a high near 88. Heat index values as high as 104. Southeast wind 9 to 11 mph. Chance of precipitation is 60%.

    High: 88 °F

    T-storms
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 84. Southeast wind 9 to 14 mph.

    Low: 84 °F

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 88. Southeast wind around 11 mph. Chance of precipitation is 70%.

    High: 88 °F

    Showers
    Likely then
    T-storms
    Likely

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 82. Southeast wind 11 to 13 mph.

    Low: 82 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 88. East wind around 9 mph. Chance of precipitation is 60%.

    High: 88 °F

    T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 82. East wind 7 to 9 mph. Chance of precipitation is 60%.

    Low: 82 °F

    T-storms
    Likely then
    Slight Chance
    T-storms

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 83. East wind around 14 mph.
Thursday
A 50 percent chance of showers and thunderstorms, mainly before 5pm. Mostly sunny, with a high near 88. Heat index values as high as 106. Southeast wind around 11 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 83. East wind 8 to 13 mph. Chance of precipitation is 20%.
Friday
Showers and thunderstorms likely, mainly before 4pm. Mostly sunny, with a high near 88. Heat index values as high as 104. Southeast wind 9 to 11 mph. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 84. Southeast wind 9 to 14 mph.
Saturday
A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 88. Southeast wind around 11 mph. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 82. Southeast wind 11 to 13 mph.
Sunday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 88. East wind around 9 mph. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 82. East wind 7 to 9 mph. Chance of precipitation is 60%.
Monday
A 50 percent chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 88.
Monday Night
A 30 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 60%.
Tuesday Night
Showers and thunderstorms likely. Mostly clear, with a low around 82. Breezy. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely. Sunny, with a high near 88. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
Key Biscayne FL
 25.69°N 80.17°W
Last Update:
2:31 am EDT Sep 10, 2026
Forecast Valid:
3am EDT Sep 10, 2026-6pm EDT Sep 16, 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