National Weather Service Forecast for: San Mateo CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 8:46 pm PDT Sep 12, 2026
 
Tonight

Tonight: Mostly clear, with a low around 57. West northwest wind 15 to 21 mph, with gusts as high as 34 mph.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 72. Breezy, with a west northwest wind 14 to 22 mph, with gusts as high as 33 mph.
Sunny then
Sunny and
Breezy
 Sunday
Night
Sunday Night: Mostly clear, with a low around 54. West northwest wind 13 to 18 mph becoming light and variable after midnight. Winds could gust as high as 30 mph.
Mostly Clear

 Monday

Monday: Sunny, with a high near 80. Light and variable wind becoming west 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.
Sunny

 Monday
Night
Monday Night: Mostly clear, with a low around 56. West southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Mostly Clear

 Tuesday

Tuesday: Mostly sunny, with a high near 78.
Mostly Sunny

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 56.
Mostly Clear

 Wednesday

Wednesday: Mostly sunny, with a high near 78.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 57.
Mostly Clear
Lo 57 °F Hi 72 °F Lo 54 °F Hi 80 °F Lo 56 °F Hi 78 °F Lo 56 °F Hi 78 °F Lo 57 °F

 

Tonight
 
 Mostly clear, with a low around 57. West northwest wind 15 to 21 mph, with gusts as high as 34 mph.
Sunday
 
 Sunny, with a high near 72. Breezy, with a west northwest wind 14 to 22 mph, with gusts as high as 33 mph.
Sunday Night
 
 Mostly clear, with a low around 54. West northwest wind 13 to 18 mph becoming light and variable after midnight. Winds could gust as high as 30 mph.
Monday
 
 Sunny, with a high near 80. Light and variable wind becoming west 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.
Monday Night
 
 Mostly clear, with a low around 56. West southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Tuesday
 
 Mostly sunny, with a high near 78.
Tuesday Night
 
 Mostly clear, with a low around 56.
Wednesday
 
 Mostly sunny, with a high near 78.
Wednesday Night
 
 Mostly clear, with a low around 57.
Thursday
 
 Sunny, with a high near 80.
Thursday Night
 
 Mostly clear, with a low around 57.
Friday
 
 Mostly sunny, with a high near 78.
Friday Night
 
 Mostly clear, with a low around 57.
Saturday
 
 Mostly sunny, with a high near 75.

 

Forecast from NOAA-NWS for San Mateo CA.