Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

Current conditions at

Half Moon Bay Airport (KHAF)

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

Clear

61°F

16°C

Humidity 82%
Wind Speed W 6 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 55°F (13°C)
Visibility 9.00 mi
Last update 18 Apr 01:55 PM PDT
Extended Forecast for

Half Moon Bay CA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 68. West wind around 6 mph.

    High: 68 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 64. Light south southwest wind becoming southwest 5 to 10 mph in the morning.

    High: 64 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 48. South wind 7 to 9 mph, with gusts as high as 18 mph.

    Low: 48 °F

    Mostly Cloudy

  • Monday

    Monday: Showers likely, mainly after 11am.  Partly sunny, with a high near 66. South wind 10 to 15 mph, with gusts as high as 26 mph.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 66 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Showers.  Low around 49. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 49 °F

    Showers

  • Tuesday

    Tuesday: Showers, with thunderstorms also possible after 11am.  High near 62. Chance of precipitation is 90%.

    High: 62 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 11pm, then a chance of showers.  Mostly cloudy, with a low around 48.

    Low: 48 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers.  Partly sunny, with a high near 63.

    High: 63 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 68. West wind around 6 mph.
Tonight
Mostly cloudy, with a low around 48. Calm wind.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 64. Light south southwest wind becoming southwest 5 to 10 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 48. South wind 7 to 9 mph, with gusts as high as 18 mph.
Monday
Showers likely, mainly after 11am. Partly sunny, with a high near 66. South wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Showers. Low around 49. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday
Showers, with thunderstorms also possible after 11am. High near 62. Chance of precipitation is 90%.
Tuesday Night
Showers likely and possibly a thunderstorm before 11pm, then a chance of showers. Mostly cloudy, with a low around 48.
Wednesday
A chance of showers. Partly sunny, with a high near 63.
Wednesday Night
Partly cloudy, with a low around 47.
Thursday
Sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
Half Moon Bay CA
 37.48°N 122.42°W (Elev. 397 ft)
1:26 pm PDT Apr 18, 2026
2pm PDT Apr 18, 2026-6pm PDT Apr 24, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database