National Weather Service Forecast for: Los Osos CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Updated: 5:58 am PDT Mar 19, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 90. West wind 5 to 10 mph.
Sunny

Tonight

Tonight: Clear, with a low around 59. West wind 5 to 10 mph becoming east in the evening.
Clear

Friday

Friday: Sunny, with a high near 86. East wind 5 to 10 mph becoming west in the morning.
Sunny

Friday
Night
Friday Night: Patchy fog after 11pm.  Otherwise, increasing clouds, with a low around 55. West wind around 5 mph becoming calm  in the evening.
Patchy Fog

Saturday

Saturday: Patchy fog before 11am.  Otherwise, partly sunny, with a high near 79. Light northwest wind becoming west northwest 5 to 10 mph in the afternoon.
Patchy Fog
then Mostly
Sunny
Saturday
Night
Saturday Night: Partly cloudy, with a low around 53.
Partly Cloudy

Sunday

Sunday: Sunny, with a high near 76.
Sunny

Sunday
Night
Sunday Night: Clear, with a low around 55.
Clear

Monday

Monday: Sunny, with a high near 78.
Sunny

Hi 90 °F Lo 59 °F Hi 86 °F Lo 55 °F Hi 79 °F Lo 53 °F Hi 76 °F Lo 55 °F Hi 78 °F

Heat Advisory
 

This Afternoon
 
Sunny, with a high near 90. West wind 5 to 10 mph.
Tonight
 
Clear, with a low around 59. West wind 5 to 10 mph becoming east in the evening.
Friday
 
Sunny, with a high near 86. East wind 5 to 10 mph becoming west in the morning.
Friday Night
 
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 55. West wind around 5 mph becoming calm in the evening.
Saturday
 
Patchy fog before 11am. Otherwise, partly sunny, with a high near 79. Light northwest wind becoming west northwest 5 to 10 mph in the afternoon.
Saturday Night
 
Partly cloudy, with a low around 53.
Sunday
 
Sunny, with a high near 76.
Sunday Night
 
Clear, with a low around 55.
Monday
 
Sunny, with a high near 78.
Monday Night
 
Clear, with a low around 58.
Tuesday
 
Sunny, with a high near 79.
Tuesday Night
 
Clear, with a low around 57.
Wednesday
 
Sunny, with a high near 76.

 

Forecast from NOAA-NWS for Los Osos CA.