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

83°F

28°C

Humidity 82%
Wind Speed SE 9 mph
Barometer 29.94 in (1013.8 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 3 Aug 3:53 am EDT
Extended Forecast for

Key Biscayne FL

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 89. Heat index values as high as 105. South wind 8 to 13 mph.

    High: 89 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 83. South wind 8 to 10 mph.

    Low: 83 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 89. Heat index values as high as 105. Southeast wind 6 to 8 mph.

    High: 89 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 83. East wind 7 to 10 mph. Chance of precipitation is 60%.

    Low: 83 °F

    T-storms
    Likely

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms, mainly after 8am. Mostly sunny, with a high near 88. East wind around 10 mph.

    High: 88 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83. Breezy, with an east wind 14 to 17 mph.

    Low: 83 °F

    Chance
    T-storms and
    Breezy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. East wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 88 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm after 2am. Partly cloudy, with a low around 83. Breezy, with an east wind 18 to 20 mph. Chance of precipitation is 60%.

    Low: 83 °F

    T-storms
    Likely and
    Breezy

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 8am, then showers and thunderstorms likely, mainly between 8am and 2pm. Mostly sunny, with a high near 88. Breezy, with an east wind 15 to 17 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 88 °F

    T-storms
    Likely and
    Breezy

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 89. Heat index values as high as 105. South wind 8 to 13 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 83. South wind 8 to 10 mph.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 89. Heat index values as high as 105. Southeast wind 6 to 8 mph.
Tuesday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 83. East wind 7 to 10 mph. Chance of precipitation is 60%.
Wednesday
A 50 percent chance of showers and thunderstorms, mainly after 8am. Mostly sunny, with a high near 88. East wind around 10 mph.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83. Breezy, with an east wind 14 to 17 mph.
Thursday
Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. East wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Thursday Night
Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm after 2am. Partly cloudy, with a low around 83. Breezy, with an east wind 18 to 20 mph. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before 8am, then showers and thunderstorms likely, mainly between 8am and 2pm. Mostly sunny, with a high near 88. Breezy, with an east wind 15 to 17 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 84. Breezy.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 84.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Key Biscayne FL
 25.66°N 80.15°W
Last Update:
4:06 am EDT Aug 3, 2026
Forecast Valid:
4am EDT Aug 3, 2026-6pm EDT Aug 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