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

Half Moon Bay Airport (KHAF)

Lat: 37.5136°NLon: 122.4996°WElev: 65.0ft.

Clear

66°F

19°C

Humidity 72%
Wind Speed NW 4 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 57°F (14°C)
Visibility 9.00 mi
Last update 17 Mar 10:55 AM PDT
Extended Forecast for

4 Miles ESE Half Moon Bay CA

Heat Advisory March 17, 11:04am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 17, 11:04am until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 66. North wind around 6 mph becoming light and variable in the evening.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84. Light and variable wind becoming north northwest around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 67. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 67 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 85. North northeast wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 66. North wind around 6 mph becoming light and variable in the evening.
Wednesday
Sunny, with a high near 84. Light and variable wind becoming north northwest around 6 mph in the afternoon.
Wednesday Night
Clear, with a low around 67. North northwest wind 5 to 7 mph becoming calm in the evening.
Thursday
Sunny, with a high near 85. Calm wind becoming north northwest around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 69.
Friday
Sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 67.
Saturday
Sunny, with a high near 74.
Saturday Night
Mostly cloudy, with a low around 58.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Half Moon Bay CA
 37.44°N 122.35°W (Elev. 728 ft)
Last Update:
1:54 am PDT Mar 17, 2026
Forecast Valid:
11am PDT Mar 17, 2026-6pm PDT Mar 23, 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