Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Mist

52°F

11°C

Humidity 87%
Wind Speed ESE 5 MPH
Barometer 30.23 in (1023.71 mb)
Dewpoint 48°F (9°C)
Visibility 4.00 mi
Last update 31 Jan 03:20 AM PST
Extended Forecast for

Foster City CA

Coastal Flood Advisory January 31, 03:37am until February 1, 12:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory January 31, 03:37am until February 1, 12:00pm

    NOW until 12:00pm Sun

    Coastal Flood Advisory

  • Overnight

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 66. Calm wind becoming north around 5 mph.

    High: 66 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Patchy fog before 4am, then patchy fog after 5am.  Otherwise, partly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 9am.  Otherwise, partly sunny, with a high near 64. Calm wind becoming northwest 5 to 9 mph in the morning.

    High: 64 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 48. West northwest wind around 8 mph.

    Low: 48 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

Detailed Forecast

Overnight
Mostly cloudy, with a low around 45. Light east wind.
Saturday
Partly sunny, with a high near 66. Calm wind becoming north around 5 mph.
Saturday Night
Patchy fog before 4am, then patchy fog after 5am. Otherwise, partly cloudy, with a low around 46. Calm wind.
Sunday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 64. Calm wind becoming northwest 5 to 9 mph in the morning.
Sunday Night
Partly cloudy, with a low around 48. West northwest wind around 8 mph.
Monday
Mostly sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Sunny, with a high near 68.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Sunny, with a high near 70.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 69.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 67.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Foster City CA
 37.57°N 122.27°W (Elev. 3 ft)
2:18 am PST Jan 31, 2026
3am PST Jan 31, 2026-6pm PST Feb 6, 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