Best Whale-Watching Cruise and Fremantle Day Trip from Perth. Experience the thrill of humpback whales breaching, swimming and playing in the water on a whale-watching cruise from Perth. As you listen to commentary provided by the knowledgeable guides, you’ll see the largest migration of whales in the southern hemisphere. With large viewing platforms, great photo opportunities and a whale-sighting guarantee, this is the ultimate whale-watching cruise. After the cruise, you'll have time for your own exploration of Fremantle before returning to Perth. Book with us and Save 20% Off Best Whale-Watching Cruise and Fremantle Day Trip from Perth.