National Weather Service Forecast for: Santee CA
Issued by: National Weather Service San Diego, CA
Updated: 12:05 pm PDT Jul 12, 2026
 
Tonight

Tonight: Partly cloudy, with a low around 66. Calm wind.
Partly Cloudy

Monday

Monday: Partly sunny, with a high near 86. Light west wind increasing to 5 to 10 mph in the afternoon.
Partly Sunny

Monday
Night
Monday Night: Partly cloudy, with a low around 67. West wind around 5 mph becoming calm  in the evening.
Partly Cloudy

Tuesday

Tuesday: Mostly sunny, with a high near 92. Light northwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Mostly Sunny

Tuesday
Night
Tuesday Night: Mostly clear, with a low around 70. West wind 5 to 10 mph becoming light southwest  in the evening.
Mostly Clear

Wednesday

Wednesday: Sunny, with a high near 99.
Sunny

Wednesday
Night
Wednesday Night: Mostly clear, with a low around 74.
Mostly Clear

Thursday

Thursday: A slight chance of showers after 11am.  Mostly sunny, with a high near 93.
Slight Chance
Showers
Thursday
Night
Thursday Night: A slight chance of showers before 11pm.  Partly cloudy, with a low around 70.
Slight Chance
Showers then
Partly Cloudy
Lo 66 °F Hi 86 °F Lo 67 °F Hi 92 °F Lo 70 °F Hi 99 °F Lo 74 °F Hi 93 °F Lo 70 °F

Extreme Heat Watch
 

Tonight
 
Partly cloudy, with a low around 66. Calm wind.
Monday
 
Partly sunny, with a high near 86. Light west wind increasing to 5 to 10 mph in the afternoon.
Monday Night
 
Partly cloudy, with a low around 67. West wind around 5 mph becoming calm in the evening.
Tuesday
 
Mostly sunny, with a high near 92. Light northwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
 
Mostly clear, with a low around 70. West wind 5 to 10 mph becoming light southwest in the evening.
Wednesday
 
Sunny, with a high near 99.
Wednesday Night
 
Mostly clear, with a low around 74.
Thursday
 
A slight chance of showers after 11am. Mostly sunny, with a high near 93.
Thursday Night
 
A slight chance of showers before 11pm. Partly cloudy, with a low around 70.
Friday
 
A slight chance of showers after 11am. Partly sunny, with a high near 89.
Friday Night
 
A chance of showers. Mostly cloudy, with a low around 69.
Saturday
 
A slight chance of showers. Mostly cloudy, then gradually becoming sunny, with a high near 89.
Saturday Night
 
Mostly clear, with a low around 69.
Sunday
 
Mostly sunny, with a high near 88.

 

Forecast from NOAA-NWS for Santee CA.