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

81°F

27°C

Humidity 72%
Wind Speed Calm
Barometer 29.99 in (1015.4 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 27 Aug 5:53 pm EDT
Extended Forecast for

Key Biscayne FL

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms after 5am. Mostly clear, with a low around 84. East wind around 9 mph. Chance of precipitation is 20%.

    Low: 84 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A slight chance of showers and thunderstorms before 11am, then a slight chance of showers and thunderstorms after noon. Sunny, with a high near 89. Heat index values as high as 103. Southeast wind 7 to 9 mph. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly after 3am. Mostly clear, with a low around 84. East wind 10 to 13 mph.

    Low: 84 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 88. Heat index values as high as 103. East wind around 10 mph. Chance of precipitation is 60%.

    High: 88 °F

    T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms, mainly between 8pm and 2am. Partly cloudy, with a low around 84. East wind 11 to 14 mph. Chance of precipitation is 60%.

    Low: 84 °F

    Showers
    Likely then
    Chance
    T-storms

  • Sunday

    Sunday: A slight 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 89. Southeast wind 9 to 11 mph. Chance of precipitation is 60%.

    High: 89 °F

    Showers
    Likely then
    T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 84. East wind 11 to 14 mph. Chance of precipitation is 60%.

    Low: 84 °F

    T-storms
    Likely then
    Chance
    T-storms

  • Monday

    Monday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 89. East wind 9 to 11 mph. Chance of precipitation is 60%.

    High: 89 °F

    T-storms
    Likely

  • Monday Night

    Monday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 84. East wind 11 to 14 mph. Chance of precipitation is 60%.

    Low: 84 °F

    T-storms
    Likely then
    Chance
    T-storms

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms after 5am. Mostly clear, with a low around 84. East wind around 9 mph. Chance of precipitation is 20%.
Friday
A slight chance of showers and thunderstorms before 11am, then a slight chance of showers and thunderstorms after noon. Sunny, with a high near 89. Heat index values as high as 103. Southeast wind 7 to 9 mph. Chance of precipitation is 20%.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly after 3am. Mostly clear, with a low around 84. East wind 10 to 13 mph.
Saturday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 88. Heat index values as high as 103. East wind around 10 mph. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms, mainly between 8pm and 2am. Partly cloudy, with a low around 84. East wind 11 to 14 mph. Chance of precipitation is 60%.
Sunday
A slight 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 89. Southeast wind 9 to 11 mph. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 84. East wind 11 to 14 mph. Chance of precipitation is 60%.
Monday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 89. East wind 9 to 11 mph. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 84. East wind 11 to 14 mph. 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. Partly cloudy, with a low around 84.
Wednesday
Showers and thunderstorms likely. Mostly sunny, with a high near 88. Chance of precipitation is 60%.
Wednesday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 84. Chance of precipitation is 60%.
Thursday
Showers and thunderstorms likely. Mostly sunny, with a high near 88. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Key Biscayne FL
 25.69°N 80.17°W
Last Update:
3:56 pm EDT Aug 27, 2026
Forecast Valid:
6pm EDT Aug 27, 2026-6pm EDT Sep 3, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation