Key Biscayne, FL Weather & Growing Conditions
This Afternoon
84°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. East wind around 16 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Chance Showers And Thunderstorms | 16 mph E | 47% |
| Tonight | 78°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 16 mph E | 59% |
| Wednesday | 83°F | Showers And Thunderstorms Likely | 10 to 14 mph E | 62% |
| Wednesday Night | 77°F | Chance Showers And Thunderstorms | 10 mph NE | 34% |
| Thursday | 84°F | Sunny | 12 mph NE | 12% |
| Thursday Night | 76°F | Mostly Clear | 8 to 12 mph NE | 2% |
| Friday | 84°F | Sunny | 9 mph NE | 8% |
| Friday Night | 74°F | Mostly Clear | 5 to 8 mph NE | 8% |
| Saturday | 84°F | Sunny | 6 mph NE | 5% |
| Saturday Night | 74°F | Mostly Clear | 6 mph N | 6% |
| Sunday | 83°F | Sunny then Slight Chance Rain Showers | 7 mph NE | 15% |
| Sunday Night | 73°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 9 mph NE | 23% |
| Monday | 82°F | Chance Showers And Thunderstorms | 12 mph N | 30% |
| Monday Night | 71°F | Chance Rain Showers | 15 mph NE | 30% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Key Biscayne, FL
Growing season
365 days
Hardiness zone
11a
Explore more for Key Biscayne, FL: full frost dates · planting calendar · Florida frost dates
Climate data from the nearest NOAA station, Cape Florida, Fl (3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.