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

86°F

30°C

Humidity 75%
Wind Speed SE 3 mph
Barometer 30.02 in (1016.7 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 31 Aug 9:53 am EDT
Extended Forecast for

Key Biscayne FL

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 88. Heat index values as high as 104. Southeast wind 6 to 8 mph.

    High: 88 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 9pm. Partly cloudy, with a low around 84. East wind 6 to 8 mph.

    Low: 84 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly between 2pm and 3pm. Mostly sunny, with a high near 88. Heat index values as high as 104. Southeast wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 84. East wind 8 to 11 mph.

    Low: 84 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 88. East wind 8 to 10 mph. Chance of precipitation is 60%.

    High: 88 °F

    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 84. East wind 13 to 15 mph. Chance of precipitation is 60%.

    Low: 84 °F

    Showers
    Likely then
    Chance
    T-storms

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 2pm, then showers and thunderstorms likely after 2pm. High near 88. East wind 11 to 13 mph. Chance of precipitation is 80%.

    High: 88 °F

    T-storms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 84. East wind 11 to 15 mph. Chance of precipitation is 60%.

    Low: 84 °F

    Showers
    Likely then
    Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms likely. Partly sunny, with a high near 88. Southeast wind around 11 mph. Chance of precipitation is 70%.

    High: 88 °F

    T-storms
    Likely

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 88. Heat index values as high as 104. Southeast wind 6 to 8 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 9pm. Partly cloudy, with a low around 84. East wind 6 to 8 mph.
Tuesday
Showers and thunderstorms likely, mainly between 2pm and 3pm. Mostly sunny, with a high near 88. Heat index values as high as 104. Southeast wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 84. East wind 8 to 11 mph.
Wednesday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 88. East wind 8 to 10 mph. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 84. East wind 13 to 15 mph. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm before 2pm, then showers and thunderstorms likely after 2pm. High near 88. East wind 11 to 13 mph. Chance of precipitation is 80%.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 84. East wind 11 to 15 mph. Chance of precipitation is 60%.
Friday
Showers and thunderstorms likely. Partly sunny, with a high near 88. Southeast wind around 11 mph. Chance of precipitation is 70%.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 84.
Saturday
Showers and thunderstorms likely. Mostly sunny, with a high near 88. Chance of precipitation is 70%.
Saturday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 83. Chance of precipitation is 60%.
Sunday
Showers and thunderstorms likely. Mostly sunny, with a high near 88. Chance of precipitation is 60%.
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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:
4:01 am EDT Aug 31, 2026
Forecast Valid:
10am EDT Aug 31, 2026-6pm EDT Sep 6, 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