National Weather Service Forecast for: Foster City CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 11:44 pm PST Feb 1, 2026
 
Overnight

Overnight: Patchy fog after 1am.  Otherwise, partly cloudy, with a low around 46. West northwest wind 3 to 5 mph.
Patchy Fog
Monday

Monday: Areas of fog before 8am.  Otherwise, sunny, with a high near 65. Northwest wind 3 to 6 mph.
Areas Fog
then Sunny
Monday
Night
Monday Night: Partly cloudy, with a low around 45. Calm wind.
Partly Cloudy
Tuesday

Tuesday: Sunny, with a high near 69. Calm wind becoming north northeast around 6 mph in the morning.
Sunny
Tuesday
Night
Tuesday Night: Clear, with a low around 46. Light east northeast wind.
Clear
Wednesday

Wednesday: Sunny, with a high near 69.
Sunny
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 47.
Mostly Clear
Thursday

Thursday: Sunny, with a high near 68.
Sunny
Thursday
Night
Thursday Night: Mostly cloudy, with a low around 49.
Mostly Cloudy
Lo 46 °F Hi 65 °F Lo 45 °F Hi 69 °F Lo 46 °F Hi 69 °F Lo 47 °F Hi 68 °F Lo 49 °F

 

Overnight
 
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 46. West northwest wind 3 to 5 mph.
Monday
 
Areas of fog before 8am. Otherwise, sunny, with a high near 65. Northwest wind 3 to 6 mph.
Monday Night
 
Partly cloudy, with a low around 45. Calm wind.
Tuesday
 
Sunny, with a high near 69. Calm wind becoming north northeast around 6 mph in the morning.
Tuesday Night
 
Clear, with a low around 46. Light east northeast wind.
Wednesday
 
Sunny, with a high near 69.
Wednesday Night
 
Mostly clear, with a low around 47.
Thursday
 
Sunny, with a high near 68.
Thursday Night
 
Mostly cloudy, with a low around 49.
Friday
 
Mostly sunny, with a high near 66.
Friday Night
 
Patchy fog. Otherwise, partly cloudy, with a low around 49.
Saturday
 
Patchy fog. Otherwise, mostly sunny, with a high near 65.
Saturday Night
 
Partly cloudy, with a low around 49.
Sunday
 
A slight chance of rain. Mostly sunny, with a high near 65.

 

Forecast from NOAA-NWS for Foster City CA.