Lake Forest, CA Weather & Growing Conditions
Tonight
59°F
Mostly Clear
Mostly clear, with a low around 59. Southeast wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Saturday | 82°F | Sunny | 0 to 5 mph S | 0% |
| Saturday Night | 61°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Sunday | 79°F | Partly Sunny | 0 to 5 mph S | 0% |
| Sunday Night | 60°F | Mostly Cloudy | 0 to 5 mph S | 1% |
| Monday | 77°F | Mostly Sunny | 5 mph S | 1% |
| Monday Night | 59°F | Partly Cloudy | 0 to 5 mph S | 2% |
| Tuesday | 80°F | Sunny | 0 to 5 mph S | 0% |
| Tuesday Night | 61°F | Mostly Clear | 0 to 5 mph W | 0% |
| Wednesday | 87°F | Sunny | 0 to 5 mph N | 2% |
| Wednesday Night | 64°F | Mostly Clear | 0 to 5 mph SW | 4% |
| Thursday | 88°F | Sunny | 0 to 5 mph S | 2% |
| Thursday Night | 65°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Friday | 88°F | Sunny | 0 to 5 mph NW | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lake Forest, CA
Growing season
365 days
Hardiness zone
10b
Explore more for Lake Forest, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Irvine Rch, Ca (4.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.