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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Current conditions at

Half Moon Bay Airport (KHAF)

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

Overcast

59°F

15°C

Humidity 100%
Wind Speed NNW 8 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 59°F (15°C)
Visibility 7.00 mi
Last update 18 Sep 03:55 AM PDT
Extended Forecast for

Half Moon Bay CA

  • Today

    Today: Patchy fog before 8am. Otherwise, partly sunny, with a high near 67. Calm wind becoming west northwest 5 to 9 mph in the morning.

    High: 67 °F

    Patchy Fog
    then Partly
    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. West northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 54 °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: Mostly cloudy, with a low around 54. West northwest wind 5 to 8 mph.

    Low: 54 °F

    Mostly 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.

    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 2am. Otherwise, mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 69.

    High: 69 °F

    Patchy Fog
    then Mostly
    Sunny

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, partly sunny, with a high near 67. Calm wind becoming west northwest 5 to 9 mph in the morning.
Tonight
Mostly cloudy, with a low around 54. 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
Mostly cloudy, with a low around 54. West northwest wind 5 to 8 mph.
Sunday
Cloudy, with a high near 64. West northwest wind 5 to 8 mph.
Sunday Night
Cloudy, with a low around 55.
Monday
Mostly cloudy, with a high near 65.
Monday Night
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 55.
Tuesday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 69.
Tuesday Night
Mostly cloudy, with a low around 55.
Wednesday
Partly sunny, with a high near 74.
Wednesday Night
Mostly cloudy, with a low around 56.
Thursday
Partly sunny, with a high near 74.
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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 am PDT Sep 18, 2026
Forecast Valid:
4am PDT Sep 18, 2026-6pm PDT Sep 24, 2026
 
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Additional Resources

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