Key Biscayne, FL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Key Biscayne, a village in Miami-Dade County, Florida.
This Afternoon
84°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. East wind around 15 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 for Key Biscayne
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Chance Showers And Thunderstorms | 15 mph E | 51% |
| Tonight | 78°F | Chance Showers And Thunderstorms | 14 mph E | 49% |
| Wednesday | 84°F | Showers And Thunderstorms Likely | 12 mph E | 55% |
| Wednesday Night | 77°F | Chance Showers And Thunderstorms | 7 to 10 mph NE | 35% |
| Thursday | 84°F | Sunny | 12 mph NE | 14% |
| Thursday Night | 76°F | Mostly Clear | 7 to 12 mph NE | 9% |
| Friday | 83°F | Sunny | 9 mph NE | 6% |
| Friday Night | 75°F | Mostly Clear | 5 to 8 mph NE | 6% |
| Saturday | 83°F | Sunny | 3 to 7 mph NE | 3% |
| Saturday Night | 75°F | Mostly Clear | 7 mph E | 4% |
| Sunday | 83°F | Sunny then Slight Chance Rain Showers | 7 mph E | 17% |
| Sunday Night | 75°F | Slight Chance Rain Showers | 10 mph SW | 20% |
| Monday | 82°F | Slight Chance Rain Showers | 13 mph N | 23% |
| Monday Night | 71°F | Slight Chance Rain Showers | 16 mph N | 23% |
Forecast source: National Weather Service (api.weather.gov) for Key Biscayne (25.691, -80.166). Updated through the day.
Growing snapshot for Key Biscayne
Growing season
365 days
Hardiness zone
11a
More local growing data for Key Biscayne: nearby ZIP 33149 weather · frost dates · planting calendar · Florida frost dates
Nearby towns & communities
Aventura
Bal Harbour
Bay Harbor Islands
Biscayne Park
Brownsville
Coral Gables
Coral Terrace
Country Club
Country Walk
Cutler Bay
Doral
El Portal
Fisher Island
Florida City
Fountainebleau
Gladeview
Glenvar Heights
Golden Beach
Golden Glades
Goulds
Hialeah
Hialeah Gardens
Homestead
Homestead Base
Indian Creek
Ives Estates
Kendale Lakes
Kendall
Kendall West
Leisure City
Climate data from the nearest NOAA station, Cape Florida, Fl (3 mi from Key Biscayne). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.