HTTP/1.1 200 OK Server: Apache X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block Content-Security-Policy: default-src 'none'; style-src 'self' code.jquery.com *.arcgis.com cdn.jsdelivr.net 'unsafe-inline'; script-src-elem 'self' https://*.weather.gov cdn.gov.cfigroup.com *.digitalgov.gov *.google-analytics.com *.arcgis.com code.jquery.com www.googletagmanager.com s.go-mpulse.net 'unsafe-inline'; img-src 'self' data: *.ncep.noaa.gov *.noaa.gov *.weather.gov *.arcgisonline.com *.arcgis.com maps.google.com; connect-src 'self' *.google-analytics.com *.arcgis.com opengeo.ncep.noaa.gov *.weather.gov; font-src 'self' cdn.jsdelivr.net; script-src 'unsafe-eval' 'unsafe-inline' Referrer-Policy: strict-origin-when-cross-origin Strict-Transport-Security: max-age=31536000; includeSubdomains; preload; Access-Control-Allow-Origin: * Content-Type: text/html; charset=UTF-8 Cache-Control: max-age=900 Expires: Fri, 05 Dec 2025 07:39:59 GMT Date: Fri, 05 Dec 2025 07:24:59 GMT Transfer-Encoding: chunked Connection: keep-alive Connection: Transfer-Encoding National Weather Service
National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 37.9°N 121.61°W (Text-Only)
NWS Forecast for: Discovery Bay CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Last Update: 7:35 pm PST Dec 4, 2025		Print

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Calm wind.

    Low: 40 °F

    Partly Cloudy


  • Friday

    Friday: Mostly sunny, with a high near 59. Light and variable wind.

    High: 59 °F

    Mostly Sunny


  • Friday
    Night

    Friday Night: Mostly clear, with a low around 42. Calm wind becoming southeast around 5 mph after midnight.

    Low: 42 °F

    Mostly Clear


  • Saturday

    Saturday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 61. Calm wind becoming north northwest around 6 mph in the morning.

    High: 61 °F

    Patchy Fog
    then Sunny

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 45. West northwest wind 3 to 5 mph.

    Low: 45 °F

    Mostly Clear


  • Sunday

    Sunday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny


  • Sunday
    Night

    Sunday Night: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 62.

    High: 62 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday
    Night

    Monday Night: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy
    then Patchy
    Fog

    • Tonight: Partly cloudy, with a low around 40. Calm wind.

    Friday: Mostly sunny, with a high near 59. Light and variable wind.

    Friday Night: Mostly clear, with a low around 42. Calm wind becoming southeast around 5 mph after midnight.

    Saturday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 61. Calm wind becoming north northwest around 6 mph in the morning.

    Saturday Night: Mostly clear, with a low around 45. West northwest wind 3 to 5 mph.

    Sunday: Partly sunny, with a high near 62.

    Sunday Night: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 45.

    Monday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 62.

    Monday Night: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 44.

    Tuesday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 61.

    Tuesday Night: Patchy fog. Otherwise, mostly cloudy, with a low around 45.

    Wednesday: Patchy fog. Otherwise, partly sunny, with a high near 62.

    Wednesday Night: Patchy fog. Otherwise, partly cloudy, with a low around 46.

    Thursday: Patchy fog. Otherwise, mostly sunny, with a high near 63.


    Discovery Bay CA
     37.9°N 121.61°W (Elev. 3 ft)

    Visit your local NWS office at: https://www.weather.gov/mtr