Current Conditions

Foster City, California

81°F27°C
Partly Cloudy

Wind

WNW 6 mph10 km/h

Humidity

41%

Cloud Cover

62%

As of Tuesday, September 8, 2026 at 5:42 PM PDT

Today's Outlook

Day

Partly cloudy and warm, with a high of 83°F28°C and morning low of 76°F24°C. Light wind from the WNW around 4 mph7 km/h.

Night

Overcast, with a low around 68°F20°C. Light wind from the W around 3 mph6 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
Partly CloudyHigh 83°F28°CLow 68°F20°CPrecip 0 in0 mmCloud 59%Wind WNW 4 mph6 km/hTuesday: Partly cloudy and warm, with a high of 83°F28°C and morning low of 76°F24°C. Light wind from the WNW around 4 mph7 km/h. Tuesday Night: Overcast, with a low around 68°F20°C. Light wind from the W around 3 mph6 km/h.
Partly CloudyHigh 88°F31°CLow 67°F19°CPrecip 0 in0 mmCloud 70%Wind NNW 4 mph7 km/hWednesday: Mostly cloudy and hot, with a high of 88°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 67°F19°C. Light wind from the WNW around 3 mph5 km/h.
ClearHigh 82°F28°CLow 66°F19°CPrecip 0 in0 mmCloud 18%Wind W 5 mph8 km/hThursday: Mostly clear and warm, with a high of 82°F28°C and morning low of 69°F20°C. Breezy from the W at 6 to 8 mph10 to 13 km/h. Thursday Night: Mostly clear, with a low around 66°F19°C. Light wind from the WSW around 4 mph6 km/h.
ClearHigh 72°F22°CLow 62°F16°CPrecip 0 in0 mmCloud 27%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: Mostly clear, with a low around 62°F16°C. Light wind from the WSW around 5 mph8 km/h.
ClearHigh 70°F21°CLow 59°F15°CPrecip 0 in0 mmCloud 18%Wind W 8 mph12 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 10 mph14 to 17 km/h. Saturday Night: Mostly clear, with a low around 59°F15°C. Breezy from the W at 7 to 9 mph10 to 14 km/h.
ClearHigh 73°F23°CLow 58°F15°CPrecip 0 in0 mmCloud 11%Wind WNW 7 mph11 km/hSunday: Mostly clear and warm, with a high of 73°F23°C and morning low of 60°F16°C. Breezy from the WNW at 8 to 10 mph13 to 16 km/h. Sunday Night: Mostly clear, with a low around 58°F15°C. Breezy from the WNW at 6 to 7 mph9 to 11 km/h.
ClearHigh 73°F23°CLow 58°F14°CPrecip 0 in0 mmCloud 22%Wind W 6 mph9 km/hMonday: Mostly clear and warm, with a high of 73°F23°C and morning low of 60°F15°C. Breezy from the W at 6 to 9 mph10 to 15 km/h. Monday Night: Mostly clear, with a low around 58°F14°C. Light wind from the W around 5 mph8 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
TuesdaySep 883°F28°C68°F20°C0 in0 mm· —59%Partly CloudyWNW 4 mph6 km/h
WednesdaySep 988°F31°C67°F19°C0 in0 mm· —70%Partly CloudyNNW 4 mph7 km/h
ThursdaySep 1082°F28°C66°F19°C0 in0 mm· —18%ClearW 5 mph8 km/h
FridaySep 1172°F22°C62°F16°C0 in0 mm· —27%ClearWSW 6 mph10 km/h
SaturdaySep 1270°F21°C59°F15°C0 in0 mm· —18%ClearW 8 mph12 km/h
SundaySep 1373°F23°C58°F15°C0 in0 mm· —11%ClearWNW 7 mph11 km/h
MondaySep 1473°F23°C58°F14°C0 in0 mm· —22%ClearW 6 mph9 km/h
TuesdaySep 1570°F21°C58°F15°C0 in0 mm· —49%Partly CloudyW 6 mph10 km/h
WednesdaySep 1670°F21°C59°F15°C0 in0 mm· —47%Partly CloudyWSW 6 mph10 km/h
ThursdaySep 1771°F22°C58°F14°C0 in0 mm· —34%ClearW 5 mph8 km/h
FridaySep 1872°F22°C58°F14°C0 in0 mm· —35%ClearW 5 mph8 km/h
SaturdaySep 1972°F22°C58°F15°C0 in0 mm· —41%Partly CloudyW 5 mph8 km/h
SundaySep 2071°F22°C59°F15°C0.01 in0.3 mm· 2%47%Partly CloudyW 5 mph8 km/h
MondaySep 2171°F22°C59°F15°C0.01 in0.3 mm· 2%50%Partly CloudyW 5 mph9 km/h
TuesdaySep 2273°F23°C59°F15°C0 in0.1 mm· 2%45%Partly CloudyW 5 mph9 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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Coordinates: 37.5585°N, 122.2711°W·Elevation: 2m·Timezone: America/Los_Angeles·Population: 33,477