Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

Half Moon Bay Airport (KHAF)

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

Partly Cloudy

54°F

12°C

Humidity 87%
Wind Speed S 9 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 50°F (10°C)
Visibility 8.00 mi
Last update 12 Apr 07:55 AM PDT
Extended Forecast for

Half Moon Bay CA

  • Today

    Today: Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm.  High near 59. West southwest wind 11 to 16 mph, with gusts as high as 28 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 59 °F

    Showers

  • Tonight

    Tonight: A slight chance of showers before 9pm, then a slight chance of showers after 11pm.  Partly cloudy, with a low around 45. West southwest wind 5 to 7 mph becoming calm  in the evening.  Chance of precipitation is 20%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 63. Light west northwest wind increasing to 5 to 10 mph in the afternoon.

    High: 63 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 46. Northwest wind 8 to 10 mph.

    Low: 46 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. West northwest wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm. High near 59. West southwest wind 11 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A slight chance of showers before 9pm, then a slight chance of showers after 11pm. Partly cloudy, with a low around 45. West southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 20%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Mostly sunny, with a high near 63. Light west northwest wind increasing to 5 to 10 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 46. Northwest wind 8 to 10 mph.
Tuesday
Mostly sunny, with a high near 61. West northwest wind 8 to 11 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Mostly sunny, with a high near 62.
Wednesday Night
Mostly cloudy, with a low around 47.
Thursday
Sunny, with a high near 65.
Thursday Night
Clear, with a low around 46.
Friday
Sunny, with a high near 68.
Friday Night
Mostly clear, with a low around 46.
Saturday
Mostly sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
Half Moon Bay CA
 37.48°N 122.42°W (Elev. 397 ft)
7:36 am PDT Apr 12, 2026
8am PDT Apr 12, 2026-6pm PDT Apr 18, 2026
 
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