Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

Lat: 37.61961°NLon: 122.36558°WElev: 10.0ft.

Clear

54°F

12°C

Humidity 76%
Wind Speed SE 5 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 18 Jan 10:30 PM PST
Extended Forecast for

Foster City CA

  • Tonight

    Tonight: Partly cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 65. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 43. Light northeast wind.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 65. North northeast wind 3 to 5 mph.

    High: 65 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46. Light east northeast wind.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 63.

    High: 63 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 1am.  Otherwise, partly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Clear
    then Patchy
    Fog

Detailed Forecast

Tonight
Partly cloudy, with a low around 47. Calm wind.
M.L.King Day
Sunny, with a high near 65. Calm wind becoming north northwest around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 43. Light northeast wind.
Tuesday
Mostly sunny, with a high near 65. North northeast wind 3 to 5 mph.
Tuesday Night
Mostly cloudy, with a low around 46. Light east northeast wind.
Wednesday
Partly sunny, with a high near 64.
Wednesday Night
Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 48.
Thursday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 63.
Thursday Night
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 47.
Friday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 62.
Friday Night
Patchy fog. Otherwise, mostly clear, with a low around 46.
Saturday
Patchy fog. Otherwise, mostly sunny, with a high near 62.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 46.
Sunday
Patchy fog. Otherwise, mostly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
Foster City CA
 37.57°N 122.27°W (Elev. 3 ft)
12:26 pm PST Jan 18, 2026
10pm PST Jan 18, 2026-6pm PST Jan 25, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database