Waianae Coast Snorkel Cruise with Dolphin and Seasonal Whale Watching from Oahu. Head to the west shore of Oahu to swim and snorkel with Hawaii’s spinner dolphins! Cruise along the Waianae Coast and snorkel with tropical fish and Hawaiian green sea turtles. During the winter months (January to March), the Waianae Coast has more visitors -- humpback whales! Round-trip Waikiki hotel transportation, lunch and snorkel gear are all included on this tour. Book now and Save 10%: Waianae Coast Snorkel Cruise with Dolphin and Seasonal Whale Watching from Oahu.