Majestic Cruises Cruise Smart Harbour Sight Seeing.
Sydney is the envy of Australia with a whale watching season that lasts over five months of the year. Over 20,000 Humpback whales make the 3,500km journey from sub-Antarctic waters to the Great Barrier Reef every year. Whale numbers peak off Sydney in June-July for the Northern migration to give birth, and September-October for the return southern migration. In August, whale behaviour is often more spectacular with younger males showing off with amazing breaches.