Marine and Coastal Impacts from Imelda; Unsettled Weather in the West

Swells and high surf from both Imelda and Humberto are expected to bring dangerous marine conditions and rip currents to much of the East Coast over the next several days. A series of Pacific frontal systems will bring waves of showers and thunderstorms to portions of northern California and the Pacific Northwest through midweek. Read More >

Current conditions at

LAS TRAMPAS (LTRC1)

Lat: 37.83389°NLon: 122.06694°WElev: 1760.0ft.

NA

57°F

14°C

Humidity 100%
Wind Speed WSW 11 MPH
Barometer NA
Dewpoint 57°F (14°C)
Visibility NA
Last update 30 Sep 12:28 AM PDT
Extended Forecast for

Walnut Creek CA

  • Overnight

    Overnight: A slight chance of rain before 5am, then a slight chance of rain or drizzle after 5am.  Mostly cloudy, with a low around 61. Light south southwest wind.  Chance of precipitation is 20%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 61 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: A slight chance of drizzle between 9am and 10am.  Mostly sunny, with a high near 77. South southwest wind 5 to 10 mph, with gusts as high as 18 mph.

    High: 77 °F

    Slight Chance
    Drizzle then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of drizzle, mainly between 11pm and 4am.  Mostly cloudy, with a low around 61. Southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 61 °F

    Chance
    Drizzle

  • Wednesday

    Wednesday: A chance of drizzle.  Mostly cloudy, with a high near 75. South wind around 6 mph.

    High: 75 °F

    Chance
    Drizzle

  • Wednesday Night

    Wednesday Night: A slight chance of drizzle before 11pm.  Mostly cloudy, with a low around 58. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 58 °F

    Slight Chance
    Drizzle then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 56.

    Low: 56 °F

    Clear

Detailed Forecast

Overnight
A slight chance of rain before 5am, then a slight chance of rain or drizzle after 5am. Mostly cloudy, with a low around 61. Light south southwest wind. Chance of precipitation is 20%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A slight chance of drizzle between 9am and 10am. Mostly sunny, with a high near 77. South southwest wind 5 to 10 mph, with gusts as high as 18 mph.
Tuesday Night
A chance of drizzle, mainly between 11pm and 4am. Mostly cloudy, with a low around 61. Southwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
A chance of drizzle. Mostly cloudy, with a high near 75. South wind around 6 mph.
Wednesday Night
A slight chance of drizzle before 11pm. Mostly cloudy, with a low around 58. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny, with a high near 81.
Friday Night
Clear, with a low around 56.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 55.
Monday
Sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Walnut Creek CA
 37.9°N 122.07°W (Elev. 203 ft)
12:52 am PDT Sep 30, 2025
1am PDT Sep 30, 2025-6pm PDT Oct 6, 2025
 
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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