Weather in Foster City, United States 🇺🇸
Current Weather in Foster City
As of now, Foster City is 18°C and overcast, feeling like 18°C. Relative humidity is 72%, with winds around 4 km/h, and the UV index is 0 (low). Looking ahead, Foster City should sit between roughly 14°C and 30°C over the coming days. ⚠️ Coastal Flood Advisory issued September 8 at 9:03AM PDT until September 10 at 1:00AM PDT by NWS San Francisco CA
Hourly Forecast for Foster City
14-Day Forecast for Foster City
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Additional Forecasts for Foster City
Air Quality
Historical Weather
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Best Time to Be Outside in Foster City Today
The most comfortable window in Foster City today looks like 17:00 to 20:00, when it is around 28°C. It should stay dry through that window. No significant rain is expected in the next several hours.
Frequently Asked Questions about Weather in Foster City
What is the temperature in Foster City right now?
Foster City is sitting at 18°C (64°F) right now, overcast (feels like 18°C).
What's the weather like in Foster City right now?
Current weather in Foster City: Overcast, humidity 72%, wind 4 km/h W.
What is today's forecast for Foster City?
Today in Foster City: high 30°C, low 17°C, overcast. Chance of rain: 7%.
What is the 7-day weather forecast for Foster City?
Daily highs and lows for Foster City:
- 2026-09-09: 30°C / 17°C
- 2026-09-10: 28°C / 16°C
- 2026-09-11: 23°C / 14°C
- 2026-09-12: 20°C / 13°C
- 2026-09-13: 21°C / 12°C
- 2026-09-14: 20°C / 13°C
- 2026-09-15: 20°C / 13°C
Is it going to rain in Foster City today?
There is a 7% chance of rain in Foster City today.
What is the wind speed in Foster City right now?
Wind in Foster City is currently 4 km/h (2 mph) from the W.
What is the UV index in Foster City right now?
The UV index in Foster City is currently 0 (low). Sun protection is recommended when the index is 3 or higher.
