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Lake Effect Snow through Saturday: A Series of Storms Impact the West

Lake effect snow showers will continue through Saturday downwind of Lakes Erie, Ontario and the eastern portion of Lake Superior. A series of storm systems will continue to impact California and the Pacific Northwest through the weekend and into next week, bringing widespread rainfall, mountain snowfall, and gusty winds. Coastal flooding is expected in northern California. Read More >

Hazardous Weather Conditions

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Overcast

55°F

13°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 54°F (12°C)
Visibility 7.00 mi
Last update 02 Jan 03:00 AM PST
Extended Forecast for

San Mateo CA

Coastal Flood Advisory January 3, 02:00pm until January 4, 02:00pm
Coastal Flood Advisory January 2, 03:16am until January 2, 07:00am
Coastal Flood Warning January 2, 07:00am until January 3, 02:00pm
Click here for hazard details and duration
Coastal Flood Advisory
Coastal Flood Advisory
Coastal Flood Warning
  •  
    Coastal Flood Advisory January 2, 03:16am until January 2, 07:00am

    NOW until 7:00am Fri

    Coastal Flood Advisory

  • Overnight

    Low: 51 °F

    Chance Rain

  • Friday

    Friday: Rain, mainly after 4pm. High near 61. South southeast wind 8 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 61 °F

    Chance Rain
    then Rain

  • Friday Night

    Friday Night: Rain. Steady temperature around 57. South wind 10 to 16 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 57 °F

    Rain

  • Saturday

    Saturday: Rain. High near 61. South wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 61 °F

    Rain

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 52. South wind 10 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 52 °F

    Showers

  • Sunday

    Sunday: Rain before 1pm, then showers and possibly a thunderstorm after 1pm. High near 59. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 59 °F

    Showers

  • Sunday Night

    Sunday Night: Rain. Low around 49. Chance of precipitation is 80%.

    Low: 49 °F

    Rain

  • Monday

    Monday: Rain. Cloudy, with a high near 57.

    High: 57 °F

    Rain

Detailed Forecast

Overnight
A 30 percent chance of rain before 4am. Mostly cloudy, with a low around 51. Southeast wind around 6 mph.
Friday
Rain, mainly after 4pm. High near 61. South southeast wind 8 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain. Steady temperature around 57. South wind 10 to 16 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Rain. High near 61. South wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Showers and possibly a thunderstorm. Low around 52. South wind 10 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Rain before 1pm, then showers and possibly a thunderstorm after 1pm. High near 59. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Rain. Low around 49. Chance of precipitation is 80%.
Monday
Rain. Cloudy, with a high near 57.
Monday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 46.
Tuesday
A slight chance of rain before 10am. Partly sunny, with a high near 58.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 46.
Wednesday
A chance of rain. Mostly cloudy, with a high near 57.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 44.
Thursday
A slight chance of rain. Mostly sunny, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Mateo CA
 37.56°N 122.33°W (Elev. 108 ft)
Last Update:
2:04 am PST Jan 2, 2026
Forecast Valid:
3am PST Jan 2, 2026-6pm PST Jan 8, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation