All students entering Westlake High School in 1979 signed a charter, which sits in the office today.

In 2016, Westlake High School won the Ventura County Academic Decathlon for the fifth year in a row.

[11] Westlake High School offers a wide variety of sports and activities, including football, basketball, cross-country, tennis, volleyball, cheerleading, water polo, soccer, wrestling, lacrosse, softball, swimming, and track and field.

Many Westlake athletic teams compete in the Marmonte League of the CIF Southern Section, and are known as the Warriors.

[12][14] WHS grad Veronika Weiss, who played on the girls' water polo team, was killed in the Isla Vista shooting.

[17] Westlake won the CIF Southern Section championships in 1999, 2003, 2009, and 2011[18] Several professional football players have played at WHS, including Billy Miller, Gary Wellman, Rudy Carpenter, Mike Seidman, and Patrick Mekari.

In 2002, Senior Brian Van Heel won the CIF/CGA California State High School Championship.

In the 1986–87 season, Jones and Wynalda helped the team post a 22-2-2 record and led them to the semifinals of the Southern Section 4-A Division playoffs.