Santa Catalina Island - Isthmus Cove UV IndexUnited StatesCALos Angeles CountySanta Catalina Island - Isthmus Cove1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAASanta Catalina Island - Isthmus Cove UV forecast issued today at 11:18 am. Next forecast at approx. 11:18 am.Get WillyWeather+ to remove ads