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

87°F

31°C

Humidity 72%
Wind Speed E 10 mph
Barometer 29.94 in (1014.0 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 1 Sep 3:53 pm EDT
Extended Forecast for

Key Biscayne FL

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely, mainly after 5pm. Partly sunny, with a high near 88. Heat index values as high as 104. East wind around 7 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    T-storms
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before midnight. Mostly cloudy, with a low around 83. Northwest wind around 6 mph becoming east after midnight. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 83 °F

    T-storms
    Likely then
    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 88. Heat index values as high as 106. Southeast wind 3 to 8 mph.

    High: 88 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 84. East wind around 8 mph. Chance of precipitation is 30%.

    Low: 84 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly sunny, with a high near 88. Southeast wind 6 to 9 mph. Chance of precipitation is 70%.

    High: 88 °F

    T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am, then showers likely and possibly a thunderstorm after 2am. Partly cloudy, with a low around 84. Southeast wind 10 to 13 mph. Chance of precipitation is 60%.

    Low: 84 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 11am, then showers and thunderstorms likely after 11am. Mostly sunny, with a high near 88. Southeast wind around 10 mph. Chance of precipitation is 70%.

    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. East wind around 10 mph.

    Low: 84 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly after 8am. Mostly sunny, with a high near 88. Southeast wind around 7 mph. Chance of precipitation is 60%.

    High: 88 °F

    T-storms
    Likely

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly after 5pm. Partly sunny, with a high near 88. Heat index values as high as 104. East wind around 7 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely, mainly before midnight. Mostly cloudy, with a low around 83. Northwest wind around 6 mph becoming east after midnight. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 88. Heat index values as high as 106. Southeast wind 3 to 8 mph.
Wednesday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 84. East wind around 8 mph. Chance of precipitation is 30%.
Thursday
Showers and thunderstorms likely, mainly between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly sunny, with a high near 88. Southeast wind 6 to 9 mph. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am, then showers likely and possibly a thunderstorm after 2am. Partly cloudy, with a low around 84. Southeast wind 10 to 13 mph. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before 11am, then showers and thunderstorms likely after 11am. Mostly sunny, with a high near 88. Southeast wind around 10 mph. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 84. East wind around 10 mph.
Saturday
Showers and thunderstorms likely, mainly after 8am. Mostly sunny, with a high near 88. Southeast wind around 7 mph. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83.
Sunday
Showers and thunderstorms likely. Mostly sunny, with a high near 88. Chance of precipitation is 70%.
Sunday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 82. Chance of precipitation is 60%.
Labor Day
Showers and thunderstorms likely. Mostly sunny, with a high near 88. Chance of precipitation is 70%.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 83. Chance of precipitation is 60%.
Tuesday
Showers and thunderstorms likely. Mostly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
Key Biscayne FL
 25.67°N 80.17°W
Last Update:
2:31 pm EDT Sep 1, 2026
Forecast Valid:
4pm EDT Sep 1, 2026-6pm EDT Sep 8, 2026
 
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Additional Resources

Radar & Satellite Image

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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