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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Half Moon Bay Airport (KHAF)

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

Mist

59°F

15°C

Humidity 100%
Wind Speed NNW 10 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 59°F (15°C)
Visibility 6.00 mi
Last update 18 Sep 06:55 PM PDT
Extended Forecast for

Half Moon Bay CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 55. West northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 55 °F

    Mostly Cloudy

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 68. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 68 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Cloudy, with a low around 55. West northwest wind 3 to 7 mph.

    Low: 55 °F

    Cloudy

  • Sunday

    Sunday: Cloudy, with a high near 64. West northwest wind 5 to 8 mph.

    High: 64 °F

    Cloudy

  • Sunday Night

    Sunday Night: Cloudy, with a low around 55. West northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 55 °F

    Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 55.

    Low: 55 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 66.

    High: 66 °F

    Patchy Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog between 9pm and 1am. Otherwise, mostly cloudy, with a low around 55.

    Low: 55 °F

    Patchy Fog

Detailed Forecast

Tonight
Mostly cloudy, with a low around 55. West northwest wind 5 to 7 mph becoming calm after midnight.
Saturday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 68. Calm wind becoming west 5 to 8 mph in the afternoon.
Saturday Night
Cloudy, with a low around 55. West northwest wind 3 to 7 mph.
Sunday
Cloudy, with a high near 64. West northwest wind 5 to 8 mph.
Sunday Night
Cloudy, with a low around 55. West northwest wind 5 to 7 mph becoming calm after midnight.
Monday
Mostly cloudy, with a high near 65.
Monday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 55.
Tuesday
Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 66.
Tuesday Night
Patchy fog between 9pm and 1am. Otherwise, mostly cloudy, with a low around 55.
Wednesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 73.
Wednesday Night
Mostly cloudy, with a low around 57.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Mostly cloudy, with a low around 57.
Friday
Partly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Half Moon Bay CA
 37.47°N 122.45°W (Elev. 7 ft)
Last Update:
1:26 pm PDT Sep 18, 2026
Forecast Valid:
7pm PDT Sep 18, 2026-6pm PDT Sep 25, 2026
 
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Additional Resources

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Chance of Precipitation