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.

Thunderstorm

80°F

27°C

Humidity 90%
Wind Speed NW 5 mph
Barometer 30.05 in (1017.6 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 9 Sep 4:53 am EDT
Extended Forecast for

Key Biscayne FL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83. East wind around 9 mph.

    Low: 83 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. Heat index values as high as 104. East wind 9 to 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

  • Wednesday Night

    Wednesday Night: 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%.

    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

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83. East wind around 9 mph.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. Heat index values as high as 104. East wind 9 to 11 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
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%.
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. Chance of precipitation is 70%.
Sunday Night
A 20 percent chance of showers and thunderstorms. 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:
5am 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