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Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Overcast

57°F

14°C

Humidity 76%
Wind Speed WSW 17 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 12 Apr 02:30 PM PDT
Extended Forecast for

San Mateo CA

  • This Afternoon

    This Afternoon: Showers likely and possibly a thunderstorm before 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 61. Southwest wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 61 °F

    Showers
    Likely

  • Tonight

    Tonight: A 30 percent chance of showers, mainly between 1am and 3am. Partly cloudy, with a low around 48. West southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 48 °F

    Chance
    Showers

  • Monday

    Monday: Sunny, with a high near 66. Light northwest wind becoming west northwest 5 to 10 mph in the afternoon.

    High: 66 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 49. West northwest wind 6 to 10 mph.

    Low: 49 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66. West wind 5 to 9 mph.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

  • Wednesday Night

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

    Low: 49 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm before 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 61. Southwest wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers, mainly between 1am and 3am. Partly cloudy, with a low around 48. West southwest wind 5 to 7 mph becoming calm in the evening.
Monday
Sunny, with a high near 66. Light northwest wind becoming west northwest 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 49. West northwest wind 6 to 10 mph.
Tuesday
Mostly sunny, with a high near 66. West wind 5 to 9 mph.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
Partly sunny, with a high near 67.
Wednesday Night
Partly cloudy, with a low around 49.
Thursday
Sunny, with a high near 68.
Thursday Night
Clear, with a low around 48.
Friday
Sunny, with a high near 73.
Friday Night
Mostly clear, with a low around 48.
Saturday
Sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Mateo CA
 37.54°N 122.32°W (Elev. 194 ft)
Last Update:
1:26 pm PDT Apr 12, 2026
Forecast Valid:
2pm PDT Apr 12, 2026-6pm PDT Apr 18, 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