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

Areas of Heavy to Excessive Rainfall Which May Bring Flooding

Monsoon moisture will continue to produce areas of heavy to excessive rainfall and potential flooding across the northern Intermountain West today. Debris flows will be possible over recent wildfire burn areas. Heavy to excessive rainfall and flash flooding will be possible across the central Rockies into the south-central Plains and lower Mississippi Valley through Thursday. Read More >

Current conditions at

Half Moon Bay Airport (KHAF)

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

Partly Cloudy

68°F

20°C

Humidity 72%
Wind Speed SSW 6 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 59°F (15°C)
Visibility 9.00 mi
Last update 27 Aug 12:35 PM PDT
Extended Forecast for

Half Moon Bay CA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 65. Southwest wind around 8 mph.

    High: 65 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog between 3am and 4am. Otherwise, increasing clouds, with a low around 55. Southwest wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog between 7am and 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 66. Calm wind becoming west around 6 mph in the afternoon.

    High: 66 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 56. West wind around 6 mph becoming calm in the evening.

    Low: 56 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 66. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 66 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

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

    Low: 56 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 65. Southwest wind around 8 mph.
Tonight
Patchy fog between 3am and 4am. Otherwise, increasing clouds, with a low around 55. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Patchy fog between 7am and 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 66. Calm wind becoming west around 6 mph in the afternoon.
Thursday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 56. West wind around 6 mph becoming calm in the evening.
Friday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 66. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Partly sunny, with a high near 66.
Sunday Night
Mostly cloudy, with a low around 56.
Labor Day
Mostly cloudy, with a high near 63.
Monday Night
Cloudy, with a low around 56.
Tuesday
Mostly cloudy, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Half Moon Bay CA
 37.47°N 122.45°W (Elev. 7 ft)
Last Update:
8:52 am PDT Aug 27, 2025
Forecast Valid:
12pm PDT Aug 27, 2025-6pm PDT Sep 2, 2025
 
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Additional Resources

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