National Weather Service Forecast for: Lake Forest CA
Issued by: National Weather Service San Diego, CA
Updated: 1:27 pm PDT Jun 19, 2025
 
Tonight

Tonight: Patchy fog after 11pm.  Otherwise, increasing clouds, with a low around 61. West wind around 5 mph becoming southeast after midnight.
Patchy Fog

Friday

Friday: Patchy fog before 11am.  Otherwise, mostly sunny, with a high near 78. South wind 5 to 10 mph.
Patchy Fog
then Sunny
Friday
Night
Friday Night: Patchy fog after 11pm.  Otherwise, increasing clouds, with a low around 59. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Patchy Fog

Saturday

Saturday: Patchy fog before 11am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 74. Southeast wind 5 to 10 mph becoming southwest in the afternoon.
Patchy Fog
then Mostly
Sunny
Saturday
Night
Saturday Night: Patchy fog after 11pm.  Otherwise, partly cloudy, with a low around 58. Southwest wind around 5 mph becoming southeast after midnight.
Patchy Fog

Sunday

Sunday: Patchy fog before 11am.  Otherwise, mostly sunny, with a high near 77.
Patchy Fog
then Sunny
Sunday
Night
Sunday Night: Partly cloudy, with a low around 59.
Partly Cloudy

Monday

Monday: Mostly sunny, with a high near 78.
Mostly Sunny

Monday
Night
Monday Night: Partly cloudy, with a low around 58.
Partly Cloudy

Lo 61 °F Hi 78 °F Lo 59 °F Hi 74 °F Lo 58 °F Hi 77 °F Lo 59 °F Hi 78 °F Lo 58 °F

 

Tonight
 
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 61. West wind around 5 mph becoming southeast after midnight.
Friday
 
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 78. South wind 5 to 10 mph.
Friday Night
 
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 59. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
 
Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 74. Southeast wind 5 to 10 mph becoming southwest in the afternoon.
Saturday Night
 
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 58. Southwest wind around 5 mph becoming southeast after midnight.
Sunday
 
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 77.
Sunday Night
 
Partly cloudy, with a low around 59.
Monday
 
Mostly sunny, with a high near 78.
Monday Night
 
Partly cloudy, with a low around 58.
Tuesday
 
Mostly sunny, with a high near 76.
Tuesday Night
 
Partly cloudy, with a low around 58.
Wednesday
 
Mostly sunny, with a high near 79.
Wednesday Night
 
Partly cloudy, with a low around 59.
Thursday
 
Mostly sunny, with a high near 81.

 

Forecast from NOAA-NWS for Lake Forest CA.