The school has its origin in 1957, when it opened as a
co-ed institution. In 1962 Westlake Girls and
Westlake Boys High School emerged as separate schools, though they maintain relations. After three decades of service, principal Alison Gernhoefer retired at the end of 2011, succeeded by Roz Mexted. In the
1994 Queen's Birthday Honours, Gernhoefer was appointed a
Companion of the Queen's Service Order for public services. The Gernhoefer Administration building is named in her honour. She died on 12 April 2022. Mexted was principal from November 2011 to November 2016. Changes during her tenure were the introduction of a new Junior and Senior uniform, and the development of the undercover netball and tennis courts visible from the motorway. The house system was also updated in an effort to increase school unity and spirit. Jane Stanley was appointed to succeed Mexted and took up the position of principal at the beginning of the second term in May 2017. She is married to former Olympic rower
Mike Stanley. ==Westlake Girls and Boys==