The Pacific Amphitheatre is an amphitheatre in Costa Mesa, Orange County, California. The amphitheatre is located on the grounds of the OC Fair & Event Center. It opened in July 1983 with Barry Manilow as the first performer. The venue currently operates from early July through early September, predominantly during the annual Summer Concert Series at the OC Fair. Since reopening in 2003, the venue has been independently managed and operated by the OC Fair & Event Center.