National Weather Service Forecast for: Lake Forest CA
Issued by: National Weather Service San Diego, CA
Updated: 10:18 am PDT May 26, 2026
 
Tonight

Tonight: Patchy drizzle after 2am. Mostly cloudy, with a low around 55. Southwest wind 5 to 10 mph becoming southeast after midnight.
Mostly Cloudy
then Patchy
Drizzle
 Wednesday

Wednesday: Patchy drizzle before 11am. Partly sunny, with a high near 66. South wind around 10 mph, with gusts as high as 20 mph.
Patchy
Drizzle then
Partly Sunny
 Wednesday
Night
Wednesday Night: Patchy drizzle after 2am. Mostly cloudy, with a low around 54. Southwest wind 5 to 10 mph becoming light in the evening.
Mostly Cloudy
then Patchy
Drizzle
 Thursday

Thursday: Patchy drizzle before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 70. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Patchy
Drizzle then
Mostly Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 55. West wind 5 to 10 mph becoming light and variable after midnight.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 72.
Mostly Sunny

 Friday
Night
Friday Night: Mostly clear, with a low around 55.
Mostly Clear

 Saturday

Saturday: Sunny, with a high near 75.
Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 57.
Mostly Clear
Lo 55 °F Hi 66 °F Lo 54 °F Hi 70 °F Lo 55 °F Hi 72 °F Lo 55 °F Hi 75 °F Lo 57 °F

 

Tonight
 
 Patchy drizzle after 2am. Mostly cloudy, with a low around 55. Southwest wind 5 to 10 mph becoming southeast after midnight.
Wednesday
 
 Patchy drizzle before 11am. Partly sunny, with a high near 66. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday Night
 
 Patchy drizzle after 2am. Mostly cloudy, with a low around 54. Southwest wind 5 to 10 mph becoming light in the evening.
Thursday
 
 Patchy drizzle before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 70. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Thursday Night
 
 Partly cloudy, with a low around 55. West wind 5 to 10 mph becoming light and variable after midnight.
Friday
 
 Mostly sunny, with a high near 72.
Friday Night
 
 Mostly clear, with a low around 55.
Saturday
 
 Sunny, with a high near 75.
Saturday Night
 
 Mostly clear, with a low around 57.
Sunday
 
 Sunny, with a high near 80.
Sunday Night
 
 Mostly clear, with a low around 59.
Monday
 
 Mostly sunny, with a high near 82.
Monday Night
 
 Mostly clear, with a low around 59.
Tuesday
 
 Sunny, with a high near 83.

 

Forecast from NOAA-NWS for Lake Forest CA.