Middleton is a town in South Australia on the eastern end of the south coast of the Fleurieu Peninsula. It is situated between the towns of Port Elliot and Goolwa. At the 2006 census, Middleton had a population of 818.Middleton is a holiday and tourist destination with a popular surf beach. Some Southern Right Whales calve and mate in the waters off Middleton's beaches and can be viewed from Middleton Point or Bashams Beach during the whale watching season (June or July to October).