National Weather Service Forecast for: Fallbrook CA
Issued by: National Weather Service San Diego, CA
Updated: 1:34 am PDT Mar 19, 2026
 
Today

Today: Sunny, with a high near 94. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunny

Tonight

Tonight: Clear, with a low around 65. Calm wind becoming north around 5 mph.
Clear

Friday

Friday: Sunny, with a high near 95. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Sunny

Friday
Night
Friday Night: Mostly clear, with a low around 63. Southeast wind around 5 mph becoming calm  in the evening.
Mostly Clear

Saturday

Saturday: Sunny, with a high near 89. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Sunny

Saturday
Night
Saturday Night: Patchy fog after 11pm.  Otherwise, partly cloudy, with a low around 59.
Patchy Fog

Sunday

Sunday: Patchy fog before 11am.  Otherwise, mostly sunny, with a high near 86.
Patchy Fog
then Mostly
Sunny
Sunday
Night
Sunday Night: Mostly clear, with a low around 59.
Mostly Clear

Monday

Monday: Sunny, with a high near 89.
Sunny

Hi 94 °F Lo 65 °F Hi 95 °F Lo 63 °F Hi 89 °F Lo 59 °F Hi 86 °F Lo 59 °F Hi 89 °F

Heat Advisory
 

Today
 
Sunny, with a high near 94. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
 
Clear, with a low around 65. Calm wind becoming north around 5 mph.
Friday
 
Sunny, with a high near 95. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
 
Mostly clear, with a low around 63. Southeast wind around 5 mph becoming calm in the evening.
Saturday
 
Sunny, with a high near 89. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
 
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 59.
Sunday
 
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 86.
Sunday Night
 
Mostly clear, with a low around 59.
Monday
 
Sunny, with a high near 89.
Monday Night
 
Mostly clear, with a low around 60.
Tuesday
 
Sunny, with a high near 90.
Tuesday Night
 
Mostly clear, with a low around 59.
Wednesday
 
Sunny, with a high near 89.

 

Forecast from NOAA-NWS for Fallbrook CA.