Prolonged Extreme Cold; Eastern U.S. Winter Storm

Another Arctic blast will surge south across the northern Plains tonight, crossing the Midwest and reaching the Gulf Coast Friday night. Dangerously cold temperatures will persist across the eastern U.S. into early February. There is increasing confidence for significant heavy snow across much of the Southern Appalachians, Carolinas, and southern Mid-Atlantic Friday into Sunday. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Clear

55°F

13°C

Humidity 76%
Wind Speed E 3 MPH
Barometer 30.34 in (1027.43 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 29 Jan 11:15 AM PST
Extended Forecast for

San Mateo CA

Coastal Flood Advisory until February 1, 12:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory until February 1, 12:00pm

    NOW until 12:00pm Sun

    Coastal Flood Advisory

  • Today

    High: 63 °F

    Sunny

  • Tonight

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

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 64. North wind 3 to 6 mph.

    High: 64 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 47. East northeast wind 3 to 5 mph.

    Low: 47 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 66. East northeast wind 3 to 5 mph.

    High: 66 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 62.

    High: 62 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 63. North wind around 6 mph.
Tonight
Partly cloudy, with a low around 47. Light northwest wind.
Friday
Mostly sunny, with a high near 64. North wind 3 to 6 mph.
Friday Night
Mostly cloudy, with a low around 47. East northeast wind 3 to 5 mph.
Saturday
Mostly sunny, with a high near 66. East northeast wind 3 to 5 mph.
Saturday Night
Mostly cloudy, with a low around 49.
Sunday
Mostly cloudy, with a high near 62.
Sunday Night
Partly cloudy, with a low around 49.
Monday
Mostly sunny, with a high near 63.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 66.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
San Mateo CA
 37.58°N 122.33°W (Elev. 33 ft)
10:53 am PST Jan 29, 2026
11am PST Jan 29, 2026-6pm PST Feb 4, 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