1964-65 saw the merger of NSW women’s and Men’s Amateur Swimming Associations to be known as NSW Amateur Swimming Association. However for several seasons the segregated competition for various trophies within Warringah for male and female swimmers continued until such trophies were won by one of the clubs. In addition, a combined program was also conducted. The first President of the Association was Keith (Curley) Meakin of Freshwater Men’s Swimming Club.
There were 16 clubs affiliated in the early years of the Association, namely: Avalon Bilgola, Collaroy, Collaroy Women’s, Curl Curl Ladies, Curl Curl Men’s, Freshwater Ladies, Dee Why Ladies, Dee Why Men’s, Freshwater Men’s, Manly Ladies, Manly Men’s, Narrabeen Ladies, Narrabeen Men’s, Newport, Queenscliff Ladies, Queenscliff Men’s