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.

Mostly Cloudy

85°F

29°C

Humidity 75%
Wind Speed S 6 mph
Barometer 29.93 in (1013.4 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 2 Sep 6:53 pm EDT
Extended Forecast for

Key Biscayne FL

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 83. Southeast wind around 6 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 83 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 89. Heat index values as high as 106. South wind 5 to 9 mph.

    High: 89 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 84. Southeast wind 9 to 11 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

  • Friday

    Friday: Showers and thunderstorms likely, mainly before 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly sunny, with a high near 88. Heat index values as high as 104. Southeast wind around 10 mph. Chance of precipitation is 70%.

    High: 88 °F

    Showers
    Likely then
    T-storms
    Likely

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 84. Southeast wind around 9 mph.

    Low: 84 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms. High near 88. Southeast wind around 8 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 around 6 mph. Chance of precipitation is 80%.

    Low: 83 °F

    T-storms then
    Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 8am. Mostly sunny, with a high near 88. Southeast wind 3 to 7 mph. Chance of precipitation is 70%.

    High: 88 °F

    T-storms
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 83. South wind around 6 mph.

    Low: 83 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 83. Southeast wind around 6 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 89. Heat index values as high as 106. South wind 5 to 9 mph.
Thursday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 84. Southeast wind 9 to 11 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and thunderstorms likely, mainly before 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly sunny, with a high near 88. Heat index values as high as 104. Southeast wind around 10 mph. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 84. Southeast wind around 9 mph.
Saturday
Showers and thunderstorms. High near 88. Southeast wind around 8 mph. Chance of precipitation is 80%.
Saturday Night
Showers and thunderstorms, mainly before 8pm. Low around 83. Southeast wind around 6 mph. Chance of precipitation is 80%.
Sunday
Showers and thunderstorms likely, mainly after 8am. Mostly sunny, with a high near 88. Southeast wind 3 to 7 mph. Chance of precipitation is 70%.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 83. South wind around 6 mph.
Labor Day
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 70%.
Monday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 83. Chance of precipitation is 60%.
Tuesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 83.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
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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:
4:31 pm EDT Sep 2, 2026
Forecast Valid:
7pm EDT Sep 2, 2026-6pm EDT Sep 9, 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