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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Current conditions at

Half Moon Bay Airport (KHAF)

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

Fog

59°F

15°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 59°F (15°C)
Visibility 0.50 mi
Last update 16 Aug 10:15 PM PDT
Extended Forecast for

Half Moon Bay CA

  • Tonight

    Tonight: Patchy drizzle after 11pm. Cloudy, with a low around 56. West wind 3 to 5 mph.

    Low: 56 °F

    Patchy
    Drizzle

  • Sunday

    Sunday: Patchy drizzle before 11am. Mostly cloudy, with a high near 62. West wind 3 to 8 mph.

    High: 62 °F

    Patchy
    Drizzle then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 54. West northwest wind 3 to 5 mph.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Cloudy, then gradually becoming mostly sunny, with a high near 63. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 63 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 54. West northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy drizzle after 11pm. Cloudy, with a low around 56. West wind 3 to 5 mph.
Sunday
Patchy drizzle before 11am. Mostly cloudy, with a high near 62. West wind 3 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 54. West northwest wind 3 to 5 mph.
Monday
Cloudy, then gradually becoming mostly sunny, with a high near 63. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 54. West northwest wind 5 to 7 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 64.
Tuesday Night
Mostly cloudy, with a low around 54.
Wednesday
Mostly sunny, with a high near 66.
Wednesday Night
Mostly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 67.
Thursday Night
Mostly cloudy, with a low around 54.
Friday
Partly sunny, with a high near 64.
Friday Night
Mostly cloudy, with a low around 54.
Saturday
Partly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Half Moon Bay CA
 37.45°N 122.41°W (Elev. 197 ft)
Last Update:
1:26 pm PDT Aug 16, 2025
Forecast Valid:
10pm PDT Aug 16, 2025-6pm PDT Aug 23, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

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Chance of Precipitation