Sea Lake is a town in the Mallee district of north-west Victoria, Australia and is situated on the southern shores of Lake Tyrrell. The town is located on the Calder Highway, 351 kilometres (218 mi) north-west of Melbourne, and 70 kilometres (43 mi) west of Swan Hill. Sea Lake is in the heart of Australia's "wheat belt", and is the main township for a number of wheat farms in the region.