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Foster City, CA Weather Forecast

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Foster City, CA Weather Forecast

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Foster City CA weather - Mostly Cloudy - 63°F
Mostly Cloudy
63°F
Updated 3:19 am
Feels Like 53°F
Humidity 80%
Wind W 7 mph
Barometer  30.01 in
Dew Point 57°F
Foster City CA weather - Mostly Cloudy - 17°C
Mostly Cloudy
17°C
Updated 3:19 am
Feels Like 12°C
Humidity 80%
Wind W 11 km/h
Barometer  101.6 kPa
Dew Point 14°C
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Foster City Weather Forecast

REST OF TONIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY TUESDAY TUESDAY NIGHT
Foster City, CA Weather - Rest Of Tonight Mostly Cloudy Foster City, CA Weather - Thursday Mostly Cloudy Foster City, CA Weather - Thursday Night Patchy Fog Foster City, CA Weather - Friday Patchy Fog Foster City, CA Weather - Friday Night Partly Cloudy Foster City, CA Weather - Saturday Partly Cloudy Foster City, CA Weather - Saturday Night Mostly Cloudy Foster City, CA Weather - Sunday Mostly Cloudy Foster City, CA Weather - Sunday Night Mostly Cloudy Foster City, CA Weather - Monday Partly Cloudy Foster City, CA Weather - Tuesday Partly Cloudy Foster City, CA Weather - Tuesday Night Mostly Clear
Mostly Cloudy Mostly Cloudy Patchy Fog Patchy Fog Partly Cloudy Partly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Partly Cloudy Partly Cloudy Mostly Clear
Lo: 59°FLo: 15°C Hi: 73°FHi: 23°C
 Lo: 59°FLo: 15°C Hi: 75°FHi: 24°C
 Lo: 59°FLo: 15°C Hi: 76°FHi: 24°C
 Lo: 59°FLo: 15°C Hi: 73°FHi: 23°C
Lo: 59°FLo: 15°C		 Hi: 73°FHi: 23°C
Lo: 59°FLo: 15°C		 Hi: 76°FHi: 24°C
Lo: 59°FLo: 15°C		 Hi: 76°FHi: 24°C
Lo: 59°FLo: 15°C		 Hi: 76°FHi: 24°C
Lo: 59°FLo: 15°C
POP = Probability of Precipitation.
Weather Outlook Updated: 302 AM PDT Thu Sep 17 2026 Foster City, CA Weather - WeatherWorld.com

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Issued: 108 AM PDT Thu Sep 17 2026

Key Messages

Updated at 1211 AM PDT Thu Sep 17 2026
  • Cooler temperatures through Thursday
  • Warming trend Friday into the weekend

Aviation

... (06Z TAFS) Issued at 933 PM PDT Wed Sep 16 2026

Currently a mixed bag of MVFR-VFR. Transient TAF period on tap thanks to an upper-level low to our north that is mixing up the environment. As a result, ceilings on the cusp of MVFR/low-end VFR are expected through tomorrow morning for most terminals. Drizzle will lower ceilings and visibilities; the best chances a...