Lake Forest, CA Weather & Growing Conditions
This Afternoon
82°F
Sunny
Sunny, with a high near 82. West wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 82°F | Sunny | 5 mph W | 0% |
| Tonight | 65°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Sunday | 80°F | Partly Sunny | 0 to 5 mph S | 2% |
| Sunday Night | 64°F | Mostly Cloudy | 0 to 5 mph S | 2% |
| Monday | 77°F | Mostly Sunny | 0 to 5 mph S | 2% |
| Monday Night | 64°F | Partly Cloudy | 0 to 5 mph SE | 1% |
| Tuesday | 78°F | Sunny | 0 to 5 mph SW | 0% |
| Tuesday Night | 65°F | Mostly Clear | 0 to 5 mph S | 0% |
| Wednesday | 85°F | Sunny | 0 to 5 mph S | 0% |
| Wednesday Night | 66°F | Mostly Clear | 0 to 5 mph S | 0% |
| Thursday | 87°F | Sunny | 0 to 5 mph SW | 1% |
| Thursday Night | 67°F | Mostly Clear | 0 to 5 mph SW | 1% |
| Friday | 87°F | Sunny | 0 to 5 mph SW | 1% |
| Friday Night | 68°F | Partly Cloudy | 0 to 5 mph SE | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lake Forest, CA
Last spring frost
Jan 5
First fall frost
Dec 25
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, Tustin Irvine Rch, Ca (5.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.