National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Rain in the Southern U.S.; Active Weather Continues in Alaska

A storm system will bring heavy rainfall, thunderstorms, and flooding threats to portions of the Southern Plains today, the Lower Mississippi Valley Saturday, and the Southeast into the Mid-Atlantic on Sunday. Another Bering system will impact the Alaskan West Coast and Central Interior through the weekend bringing moderate to heavy snow, high winds, and/or some blizzard conditions. Read More >

Hazardous Weather Conditions

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Mostly Cloudy

52°F

11°C

Humidity 81%
Wind Speed SSE 10 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 15 Feb 07:20 AM PST
Extended Forecast for

San Mateo CA

Coastal Flood Advisory until February 17, 03:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory until February 17, 03:00pm

    NOW until 3:00pm Tue

    Coastal Flood Advisory

  • Today

    High: 61 °F

    Showers

  • Tonight

    Tonight: Rain and possibly a thunderstorm. Low around 48. Southeast wind 5 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 48 °F

    Rain

  • Washington's Birthday

    Washington's Birthday: Rain. High near 54. East northeast wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 54 °F

    Rain

  • Monday Night

    Monday Night: Rain, mainly after 4am. Low around 44. West wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 44 °F

    Rain

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm before 7am, then showers and possibly a thunderstorm after 7am. High near 53. Southwest wind 14 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 53 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 10pm, then rain, mainly after 10pm. Low around 42. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Showers

  • Wednesday

    Wednesday: Rain. High near 53. Chance of precipitation is 80%.

    High: 53 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Rain

Detailed Forecast

Today
Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. High near 61. South southeast wind 9 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Rain and possibly a thunderstorm. Low around 48. Southeast wind 5 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Washington's Birthday
Rain. High near 54. East northeast wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
Rain, mainly after 4am. Low around 44. West wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Rain and possibly a thunderstorm before 7am, then showers and possibly a thunderstorm after 7am. High near 53. Southwest wind 14 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers and possibly a thunderstorm before 10pm, then rain, mainly after 10pm. Low around 42. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Rain. High near 53. Chance of precipitation is 80%.
Wednesday Night
Rain. Mostly cloudy, with a low around 43.
Thursday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 54.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 42.
Friday
A chance of rain. Partly sunny, with a high near 56.
Friday Night
A chance of rain. Mostly cloudy, with a low around 42.
Saturday
A chance of rain. Partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Mateo CA
 37.54°N 122.32°W (Elev. 194 ft)
Last Update:
3:03 am PST Feb 15, 2026
Forecast Valid:
7am PST Feb 15, 2026-6pm PST Feb 21, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation