National Weather Service Forecast for: Rancho Santa Margarita CA
Issued by: National Weather Service San Diego, CA
Updated: 8:46 pm PDT Jun 22, 2025
 
Overnight

Overnight: Partly cloudy, with a low around 55. Southeast wind around 5 mph.
Partly Cloudy
 Monday

Monday: Mostly sunny, with a high near 73. South wind 5 to 10 mph.
Mostly Sunny
 Monday
Night
Monday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 51. Southwest wind around 5 mph becoming calm in the evening.
Patchy Fog
 Tuesday

Tuesday: Mostly sunny, with a high near 75. Light south wind becoming west 5 to 10 mph in the afternoon.
Mostly Sunny
 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 54. West wind around 5 mph becoming calm in the evening.
Partly Cloudy
 Wednesday

Wednesday: Mostly sunny, with a high near 80.
Mostly Sunny
 Wednesday
Night
Wednesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 57.
Patchy Fog
 Thursday

Thursday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 81.
Patchy Fog
then Sunny
 Thursday
Night
Thursday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 58.
Patchy Fog
Lo 55 °F Hi 73 °F Lo 51 °F Hi 75 °F Lo 54 °F Hi 80 °F Lo 57 °F Hi 81 °F Lo 58 °F

 

Overnight
 
 Partly cloudy, with a low around 55. Southeast wind around 5 mph.
Monday
 
 Mostly sunny, with a high near 73. South wind 5 to 10 mph.
Monday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 51. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
 
 Mostly sunny, with a high near 75. Light south wind becoming west 5 to 10 mph in the afternoon.
Tuesday Night
 
 Partly cloudy, with a low around 54. West wind around 5 mph becoming calm in the evening.
Wednesday
 
 Mostly sunny, with a high near 80.
Wednesday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 57.
Thursday
 
 Patchy fog before 11am. Otherwise, mostly sunny, with a high near 81.
Thursday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 58.
Friday
 
 Patchy fog before 11am. Otherwise, mostly sunny, with a high near 83.
Friday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 59.
Saturday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 84.
Saturday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 59.
Sunday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 84.

 

Forecast from NOAA-NWS for Rancho Santa Margarita CA.