San Pablo Bay - Petaluma River Entrance UV IndexUnited StatesCASonoma CountySan Pablo Bay - Petaluma River Entrance1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAASan Pablo Bay - Petaluma River Entrance UV forecast issued yesterday at 11:18 am. Next forecast at approx. 11:18 am. UV IndexGet WillyWeather+ to remove ads