Lake Forest, CA Weather & Growing Conditions
Overnight
57°F
Patchy Drizzle
Patchy drizzle. Mostly clear, with a low around 57. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Patchy Drizzle | 5 mph E | 6% |
| Wednesday | 75°F | Patchy Drizzle then Sunny | 0 to 5 mph S | 6% |
| Wednesday Night | 58°F | Partly Cloudy | 0 to 5 mph E | 0% |
| Thursday | 80°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Thursday Night | 59°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Friday | 85°F | Sunny | 5 mph N | 0% |
| Friday Night | 61°F | Clear | 5 to 10 mph NE | 0% |
| Saturday | 86°F | Sunny | 0 to 10 mph N | 0% |
| Saturday Night | 63°F | Mostly Clear | 5 to 10 mph N | 0% |
| Sunday | 86°F | Sunny | 0 to 5 mph W | 0% |
| Sunday Night | 65°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Monday | 83°F | Mostly Sunny | 0 to 5 mph SW | 0% |
| Monday Night | 63°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Tuesday | 80°F | Mostly Sunny | 0 to 5 mph S | 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 Nov 4, 2026.