Current Conditions

Foster City, California

68°F20°C
Partly Cloudy

Wind

WSW 3 mph4 km/h

Humidity

69%

Cloud Cover

88%

As of Tuesday, September 8, 2026 at 10:44 PM PDT

Today's Outlook

Night

Mostly cloudy, with a low around 66°F19°C. Light wind from the WNW around 3 mph5 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
Partly CloudyHigh 89°F31°CLow 66°F19°CPrecip 0 in0 mmCloud 67%Wind NW 4 mph6 km/hWednesday: Mostly cloudy and hot, with a high of 89°F31°C and morning low of 68°F20°C. Breezy from the NNW at 5 to 7 mph8 to 12 km/h. Wednesday Night: Mostly cloudy, with a low around 66°F19°C. Light wind from the WNW around 3 mph5 km/h.
ClearHigh 82°F28°CLow 65°F18°CPrecip 0 in0 mmCloud 24%Wind W 5 mph8 km/hThursday: Partly cloudy and warm, with a high of 82°F28°C and morning low of 68°F20°C. Breezy from the W at 6 to 8 mph10 to 13 km/h. Thursday Night: Mostly clear, with a low around 65°F18°C. Light wind from the WSW around 4 mph7 km/h.
ClearHigh 72°F22°CLow 61°F16°CPrecip 0 in0 mmCloud 31%Wind WSW 6 mph10 km/hFriday: Partly cloudy and warm, with a high of 72°F22°C and morning low of 63°F17°C. Breezy from the WSW at 7 to 8 mph11 to 13 km/h. Friday Night: Partly cloudy, with a low around 61°F16°C. Light wind from the WSW around 5 mph8 km/h.
ClearHigh 70°F21°CLow 59°F15°CPrecip 0 in0 mmCloud 21%Wind W 8 mph13 km/hSaturday: Mostly clear and warm, with a high of 70°F21°C and morning low of 61°F16°C. Breezy from the W at 9 to 11 mph14 to 18 km/h. Saturday Night: Mostly clear, with a low around 59°F15°C. Breezy from the W at 7 to 9 mph11 to 15 km/h.
ClearHigh 72°F22°CLow 58°F14°CPrecip 0 in0 mmCloud 11%Wind WNW 7 mph12 km/hSunday: Mostly clear and warm, with a high of 72°F22°C and morning low of 61°F16°C. Breezy from the WNW at 8 to 11 mph13 to 17 km/h. Sunday Night: Mostly clear, with a low around 58°F14°C. Breezy from the WNW at 6 to 8 mph10 to 12 km/h.
ClearHigh 74°F23°CLow 57°F14°CPrecip 0 in0 mmCloud 23%Wind W 5 mph8 km/hMonday: Mostly clear and warm, with a high of 74°F23°C and morning low of 59°F15°C. Breezy from the W at 6 to 9 mph9 to 15 km/h. Monday Night: Mostly clear, with a low around 57°F14°C. Light wind from the W around 4 mph7 km/h.
Partly CloudyHigh 70°F21°CLow 58°F14°CPrecip 0 in0 mmCloud 51%Wind WSW 6 mph9 km/hTuesday: Partly cloudy and warm, with a high of 70°F21°C and morning low of 60°F16°C. Breezy from the WSW at 6 to 8 mph10 to 13 km/h. Tuesday Night: Mostly cloudy, with a low around 58°F14°C. Light wind from the WSW around 5 mph8 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 989°F31°C66°F19°C0 in0 mm· —67%Partly CloudyNW 4 mph6 km/h
ThursdaySep 1082°F28°C65°F18°C0 in0 mm· —24%ClearW 5 mph8 km/h
FridaySep 1172°F22°C61°F16°C0 in0 mm· —31%ClearWSW 6 mph10 km/h
SaturdaySep 1270°F21°C59°F15°C0 in0 mm· —21%ClearW 8 mph13 km/h
SundaySep 1372°F22°C58°F14°C0 in0 mm· —11%ClearWNW 7 mph12 km/h
MondaySep 1474°F23°C57°F14°C0 in0 mm· —23%ClearW 5 mph8 km/h
TuesdaySep 1570°F21°C58°F14°C0 in0 mm· —51%Partly CloudyWSW 6 mph9 km/h
WednesdaySep 1670°F21°C58°F15°C0 in0 mm· —42%Partly CloudyWSW 6 mph9 km/h
ThursdaySep 1772°F22°C58°F14°C0 in0 mm· —30%ClearW 5 mph8 km/h
FridaySep 1872°F22°C58°F14°C0 in0.1 mm· 2%32%ClearW 5 mph8 km/h
SaturdaySep 1971°F22°C58°F15°C0 in0 mm· —42%Partly CloudyW 5 mph8 km/h
SundaySep 2071°F22°C58°F15°C0 in0.1 mm· 2%40%ClearW 6 mph9 km/h
MondaySep 2172°F22°C58°F15°C0 in0 mm· —43%Partly CloudyW 5 mph9 km/h
TuesdaySep 2273°F23°C59°F15°C0 in0.1 mm· 2%42%Partly CloudyW 5 mph8 km/h
WednesdaySep 2374°F23°C59°F15°C0 in0.1 mm· 3%40%ClearW 5 mph8 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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PatternExampleDescription
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Coordinates: 37.5585°N, 122.2711°W·Elevation: 2m·Timezone: America/Los_Angeles·Population: 33,477