Loveday Bay is an inlet in the Australian state of South Australia located at the south-eastern end of Lake Alexandrina on the west coast of the Narrung Peninsula. It is located within the locality of Narrung. The bay has a subsidiary inlet on its south coast which is known as Salt Lagoon which includes the protected area, the Salt Lagoon Islands Conservation Park. A jetty was built in Loveday Bay in 1923 and was demolished in 1949.