National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
 Point Forecast: Castro Valley CA
 37.72N 122.05W (Elev. 397 ft)
 Last Update: 1:40 am PST Dec 5, 2025
Hourly Weather Forecast Graph
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Additional Forecasts and Information
International System of UnitsForecast Discussion
7-Day ForecastTabular Forecast
River Stage Summary24 Hour Precipitation Summary
NWS Office Map