E.g., 11/20/2017

Weather on Catalina Island - Avalon, CA

You can enjoy beautiful weather year-round on Catalina Island. Blue skies and crystal clear waters await you. The dress code for the Island is “island casual.” A light sweater or jacket is recommended for cool evenings, as it gets chilly once the sun goes down. You may also appreciate a sweater or light jacket if you venture out on a boat during winter months. If you want to do any hiking, you may want to bring a good pair of sneakers or hiking boots. Don’t forget your swimsuit! The average ocean temperature hovers around 70 degrees in August, making it the warmest ocean water off the coast of California.

The weather on Catalina Island is described as a mild subtropical climate with warm year-round temperatures. The average high temperature during winter months is 63 and the average low temperature is 50 degrees Fahrenheit. The average high temperature during summer months hovers around 72 and the average low temperature is 65 degrees Fahrenheit.

Catalina receives an average of of precipitation a year, over 45 days, with January being the wettest month.

Average highs & lows:


Average Ocean Water Temperature

Summer (June-August) 70-75 degrees F
Fall (Sept - Nov) 65-70 degrees F
Winter (Dec. - Feb.) 59-65 degrees F
Spring (March-May) 65-70 degrees F