High Season: December to April
Sailing during this season: While larger ships and Barrier Reef cruises are available year round, the specialty cruises are seasonal. Tasmanian cruises operate in the southern summer (November to March) while Top End cruises operate in the winter months (April to October). It really depends on what you are after, as the weather varies so much in Australia. If the Queensland heat is too much for you, perhaps consider a winter cruise.
Low/Shoulder Season: June to August
Sailing during this season: Australia’s winter months are the quietest for cruising, but it is during this time that you can find some great bargains and experience a few of the places you wouldn’t consider going to during the hotter months.