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

Early Heat Wave in the West; Fire Concerns in the Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Elevated to critical fire weather conditions are expected today across the High Plains and southern Plains. Lake effect snow downwind of the Great Lakes will taper off today. Read More >

Hazardous Weather Conditions

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Partly Cloudy

79°F

26°C

Humidity 44%
Wind Speed N 0 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 17 Mar 03:35 PM PDT
Extended Forecast for

San Bruno CA

Heat Advisory March 17, 03:51pm until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 17, 03:51pm until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 59 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83. Calm wind becoming north around 6 mph in the afternoon.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 57. West northwest wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59. Northwest wind around 6 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

Tonight
Clear, with a low around 59. West northwest wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 83. Calm wind becoming north around 6 mph in the afternoon.
Wednesday Night
Clear, with a low around 57. West northwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 84. Calm wind becoming north northwest around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 59. Northwest wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 56.
Saturday
Mostly sunny, with a high near 72.
Saturday Night
Mostly clear, with a low around 51.
Sunday
Sunny, with a high near 67.
Sunday Night
Partly cloudy, with a low around 50.
Monday
Mostly sunny, with a high near 67.
Monday Night
Mostly cloudy, with a low around 50.
Tuesday
A slight chance of rain. Mostly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Bruno CA
 37.61°N 122.43°W (Elev. 367 ft)
Last Update:
1:49 pm PDT Mar 17, 2026
Forecast Valid:
3pm PDT Mar 17, 2026-6pm PDT Mar 24, 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