NWS Forecast for Santa Ana CA

National Weather Service Forecast for: Santa Ana CA
Issued by: National Weather Service San Diego, CA

Updated: 1:29 pm PST Dec 16, 2025

Tonight Patchy Fog	Wednesday Areas Fog	Wednesday Night Patchy Fog	Thursday Patchy Fog	Thursday Night Mostly Clear	Friday Sunny	Friday Night Partly Cloudy then Patchy Fog	Saturday Patchy Fog	Saturday Night Patchy Fog
Lo 52 °F	Hi 72 °F	Lo 52 °F	Hi 78 °F	Lo 54 °F	Hi 76 °F	Lo 53 °F	Hi 73 °F	Lo 53 °F

Air Quality Alert
Dense Fog Advisory

Tonight	Patchy fog after 7pm. Otherwise, increasing clouds, with a low around 52. Calm wind.
Wednesday	Areas of fog before 1pm. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 72. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night	Patchy fog. Otherwise, partly cloudy, with a low around 52. Southeast wind around 5 mph becoming northeast after midnight.
Thursday	Patchy fog. Otherwise, mostly sunny, with a high near 78. Calm wind becoming west around 5 mph.
Thursday Night	Mostly clear, with a low around 54. Calm wind.
Friday	Sunny, with a high near 76.
Friday Night	Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 53.
Saturday	Patchy fog before 10am, then patchy fog after 4pm. Otherwise, mostly sunny, with a high near 73.
Saturday Night	Patchy fog. Otherwise, mostly cloudy, with a low around 53.
Sunday	Areas of fog before 10am. Otherwise, partly sunny, with a high near 73.
Sunday Night	Patchy fog. Otherwise, mostly cloudy, with a low around 53.
Monday	Patchy fog. Otherwise, partly sunny, with a high near 74.
Monday Night	Patchy fog. Otherwise, mostly cloudy, with a low around 53.
Tuesday	A slight chance of showers. Patchy fog. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 71.

Forecast from NOAA-NWS for Santa Ana CA.