San Francisco Bay - Sandpiper Spit UV IndexUnited StatesCAContra Costa CountySan Francisco Bay - Sandpiper Spit1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAASan Francisco Bay - Sandpiper Spit UV forecast issued yesterday at 11:18 am. Next forecast at approx. 11:18 am.Get WillyWeather+ to remove ads