Swim with the Humpback Whales July - October while they're in the waters of Vava'u, Tonga mating, giving birth and basking with their young. Slip into the water with your snorkel gear. Feel a connection while looking into the eye of a Humpback Whale. Swim with these gentle giant mammals. Join us aboard Luminescence, our purpose-built whale watching boat. A once in a lifetime experience!