Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Half Moon Bay Airport (KHAF)

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

Mist

50°F

10°C

Humidity 100%
Wind Speed NE 4 MPH
Barometer 30.27 in (1025.06 mb)
Dewpoint 50°F (10°C)
Visibility 5.00 mi
Wind Chill49°F (9°C)
Last update 07 Dec 07:55 PM PST
Extended Forecast for

5 Miles E Half Moon Bay CA

  • Tonight

    Tonight: Patchy fog before 11pm, then patchy fog after 2am.  Otherwise, mostly clear, with a low around 43. North wind around 5 mph becoming light and variable.

    Low: 43 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog between 8am and 9am.  Otherwise, sunny, with a high near 59. East wind 5 to 7 mph becoming north in the afternoon.

    High: 59 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 46. North wind around 6 mph.

    Low: 46 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Sunny, with a high near 60. North wind 5 to 7 mph.

    High: 60 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46. North northeast wind around 6 mph.

    Low: 46 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog before 11pm, then patchy fog after 2am. Otherwise, mostly clear, with a low around 43. North wind around 5 mph becoming light and variable.
Monday
Patchy fog between 8am and 9am. Otherwise, sunny, with a high near 59. East wind 5 to 7 mph becoming north in the afternoon.
Monday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 46. North wind around 6 mph.
Tuesday
Sunny, with a high near 60. North wind 5 to 7 mph.
Tuesday Night
Mostly clear, with a low around 46. North northeast wind around 6 mph.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 64.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 64.
Friday Night
Mostly clear, with a low around 46.
Saturday
Sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 46.
Sunday
Mostly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles E Half Moon Bay CA
 37.47°N 122.33°W (Elev. 817 ft)
6:20 pm PST Dec 7, 2025
8pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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