Portsea is a resort town located across Port Phillip from Melbourne, Victoria, Australia. Its Local Government Area is the Shire of Mornington Peninsula. Portsea is a popular holiday spot, located near the end of the Mornington Peninsula between the calm waters of Port Phillip and the wild surf of Bass Strait. The 3944 postcode is the nation's most affluent outperforming other upper class Victorian suburbs including Toorak and Hawthorn both known for upper middle class and upper class dwellings ranging from 5 million dollars to 25 million dollars, with an average taxable income almost $10,000 higher than Sydney's Darling Point or Point Piper.