Whitsunday islands are 74 islands within the great barrier reef marine park with the whitehaven beach with pure sand
Rottnest Island used to be a military base but now it is just a peaceful home to this unique creature named the Quokka. It has good beaches for swimming and amazing reef and the best way to explore the island is trough bike.
Magnetic islnd is quickly becoming on of the most attracted island because of its koalas, reefs, walking trails, beaches, and its own IslandLife beach festival.
Fitzroy island is a little less crowded but it is still cool. There is a trampoline in the ocean beachfront bar, kayaks, snorkling, the great barrier reef and for some people even a nudist beach.
The next island is Fraser island which is the largest sand island in the world but the water surrounding it isn't good for swimmming because of the rough waters but the lakes inside the island are really good for swimming. Eucalyptus Forest, Dingos, Lookouts and beautiful swimming lakes
Philip Island which is very close to Melbourne (only 1.5 hours south) is a very interesting island. It is home to the penguin parade yes they do have penguins in australia. It is a very popular surf spot and day tours depart from Base St Kilda and Melbourne CBD