Graham Claude Windeatt (born 5 August 1954) is an Australian former long-distance freestyle swimmer of the 1970s, who won a silver medal in the 1500-metre freestyle at the 1972 Summer Olympics in Munich. In 1971 as a school student Windeatt broke the men's world 800-metre freestyle record in the NSW Combined High Schools Swimming Championships held at North Sydney pool. He married Nira Stove in 1979, they have two adult children.