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

Strong Storm System Brings Heavy Mountain Snow to the Sierra Nevada and Critical Fire Weather Conditions to the Plains

A Pacific storm system will continue to bring low elevation rain and mountain snow to much of the West through Wednesday, with heavy mountain snow expected in the higher elevations of the Sierra Nevada. This system will also bring strong winds to the Intermountain West, Rockies, and Plains, which will create Critical fire weather conditions for the High Plains. Read More >

Current conditions at

Half Moon Bay Airport (KHAF)

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

Partly Cloudy

55°F

13°C

Humidity 82%
Wind Speed W 8 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 21 Apr 09:15 PM PDT
Extended Forecast for

Half Moon Bay CA

  • Tonight

    Tonight: A chance of rain, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 47. South southwest wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Partly Cloudy
    then Showers
    Likely

  • Wednesday

    Wednesday: Rain likely and possibly a thunderstorm before 11am, then a chance of rain between 11am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 62. South southwest wind 6 to 8 mph becoming west in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    Rain Likely
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46. Northwest wind around 6 mph becoming light and variable after midnight.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 65. Light and variable wind becoming west northwest 5 to 10 mph in the afternoon.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 47. West northwest wind 5 to 10 mph, with gusts as high as 18 mph.

    Low: 47 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 62.

    High: 62 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 61.

    High: 61 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of rain, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 47. South southwest wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Rain likely and possibly a thunderstorm before 11am, then a chance of rain between 11am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 62. South southwest wind 6 to 8 mph becoming west in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Mostly clear, with a low around 46. Northwest wind around 6 mph becoming light and variable after midnight.
Thursday
Sunny, with a high near 65. Light and variable wind becoming west northwest 5 to 10 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 47. West northwest wind 5 to 10 mph, with gusts as high as 18 mph.
Friday
Mostly cloudy, with a high near 62.
Friday Night
Mostly cloudy, with a low around 48.
Saturday
Mostly cloudy, with a high near 61.
Saturday Night
Mostly cloudy, with a low around 48.
Sunday
Mostly sunny, with a high near 62.
Sunday Night
Partly cloudy, with a low around 48.
Monday
Partly sunny, with a high near 64.
Monday Night
Mostly cloudy, with a low around 48.
Tuesday
A slight chance of rain. Mostly sunny, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
Half Moon Bay CA
 37.48°N 122.42°W (Elev. 397 ft)
Last Update:
8:32 pm PDT Apr 21, 2026
Forecast Valid:
9pm PDT Apr 21, 2026-6pm PDT Apr 28, 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