National Weather Service Forecast for: Foster City CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 3:06 pm PST Nov 1, 2026
 
Tonight

Tonight: Increasing clouds, with a low around 50. Light and variable wind.
Increasing
Clouds
 Monday

Monday: Mostly cloudy, with a high near 68. Light and variable wind.
Mostly Cloudy

 Monday
Night
Monday Night: Showers likely, mainly after 4am. Mostly cloudy, with a low around 52. Calm wind becoming south southwest around 6 mph in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Mostly Cloudy
then Showers
Likely
 Tuesday

Tuesday: Showers, mainly before 4pm. High near 66. South southeast wind 7 to 9 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Showers

 Tuesday
Night
Tuesday Night: A 30 percent chance of showers before 10pm. Partly cloudy, with a low around 51. East northeast wind 5 to 7 mph.
Chance
Showers then
Partly Cloudy
 Wednesday

Wednesday: Mostly sunny, with a high near 68.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 52.
Partly Cloudy

 Thursday

Thursday: Mostly sunny, with a high near 70.
Mostly Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 52.
Mostly Clear
Lo 50 °F Hi 68 °F Lo 52 °F Hi 66 °F Lo 51 °F Hi 68 °F Lo 52 °F Hi 70 °F Lo 52 °F

 

Tonight
 
 Increasing clouds, with a low around 50. Light and variable wind.
Monday
 
 Mostly cloudy, with a high near 68. Light and variable wind.
Monday Night
 
 Showers likely, mainly after 4am. Mostly cloudy, with a low around 52. Calm wind becoming south southwest around 6 mph in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
 
 Showers, mainly before 4pm. High near 66. South southeast wind 7 to 9 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 A 30 percent chance of showers before 10pm. Partly cloudy, with a low around 51. East northeast wind 5 to 7 mph.
Wednesday
 
 Mostly sunny, with a high near 68.
Wednesday Night
 
 Partly cloudy, with a low around 52.
Thursday
 
 Mostly sunny, with a high near 70.
Thursday Night
 
 Mostly clear, with a low around 52.
Friday
 
 Mostly sunny, with a high near 73.
Friday Night
 
 Mostly clear, with a low around 53.
Saturday
 
 Sunny, with a high near 76.
Saturday Night
 
 Partly cloudy, with a low around 54.
Sunday
 
 Mostly sunny, with a high near 75.

 

Forecast from NOAA-NWS for Foster City CA.