Melbourne's legendary and usually the most packed beach, lined with markets, cafés and bars.
There are plenty possibilities for sports lovers as well - they can play volleyball, go kitesurfing, windsurfing, sailing and there is also a bicycle track along the beach.
Wikipedia https://en.wikipedia.org/wiki/St_Kilda_Beach,_Victoria
Address (Unnamed Road), Melbourne 3182, Australia
Coordinates -37°52'4.184" N 144°58'24.93" E