National Weather Service Forecast for: Lake Forest CA
Issued by: National Weather Service San Diego, CA
Updated: 1:40 am PST Dec 5, 2025
 
Overnight

Overnight: Mostly clear, with a low around 50. East wind around 5 mph becoming calm.
Mostly Clear
 Friday

Friday: Sunny, with a high near 70. Southeast wind around 5 mph becoming west in the afternoon.
Sunny
 Friday
Night
Friday Night: Clear, with a low around 51. Calm wind becoming east around 5 mph.
Clear
 Saturday

Saturday: Sunny, with a high near 70. Calm wind becoming southwest around 5 mph in the afternoon.
Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 51. Calm wind becoming east around 5 mph.
Mostly Clear
 Sunday

Sunday: Sunny, with a high near 73.
Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 53.
Mostly Clear
 Monday

Monday: Sunny, with a high near 78.
Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 56.
Mostly Clear
Lo 50 °F Hi 70 °F Lo 51 °F Hi 70 °F Lo 51 °F Hi 73 °F Lo 53 °F Hi 78 °F Lo 56 °F

 

Overnight
 
 Mostly clear, with a low around 50. East wind around 5 mph becoming calm.
Friday
 
 Sunny, with a high near 70. Southeast wind around 5 mph becoming west in the afternoon.
Friday Night
 
 Clear, with a low around 51. Calm wind becoming east around 5 mph.
Saturday
 
 Sunny, with a high near 70. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
 
 Mostly clear, with a low around 51. Calm wind becoming east around 5 mph.
Sunday
 
 Sunny, with a high near 73.
Sunday Night
 
 Mostly clear, with a low around 53.
Monday
 
 Sunny, with a high near 78.
Monday Night
 
 Mostly clear, with a low around 56.
Tuesday
 
 Sunny, with a high near 79.
Tuesday Night
 
 Mostly clear, with a low around 55.
Wednesday
 
 Sunny, with a high near 78.
Wednesday Night
 
 Mostly clear, with a low around 56.
Thursday
 
 Sunny, with a high near 77.

 

Forecast from NOAA-NWS for Lake Forest CA.