Waianae Harbor is a small boat harbor on the west coast of Oahu, Hawaii, offering sportfishing charters, sailing cruises, dolphin excursions, whale watching, and snorkeling tours. It features facilities including 109 berths, 7 ramps, vessel washdown, fish hoist, marine sanitation pump out, harbor office, restrooms, ice house, and convenience store. Various operators like Hawaii Nautical (family-owned ocean activities), Dolphin Excursions (dolphin and whale watching on 34-foot RIB for small groups), and others provide services such as swim with wild dolphins, snorkeling with turtles and reef fish, sunset cruises, and private charters with limited capacity for intimate experiences.

Hawaii Sail Charters is Kona's Premier Sailing Tours on the Big Island, offering private sailing charters including snorkeling adventures, wild dolphin swims, snorkel tours to Captain Cook and Kealakekua Bay, sport fishing, whale watching, and sunset sails.

Dolphin Excursions Hawaii, Inc. offers charter boat excursions on Oahu's Waianae Coast, specializing in viewing wild spinner dolphins year-round, humpback whales in winter, and snorkeling with sea turtles and tropical fish. Tours are limited to a maximum of 15-16 guests for personalized service, led by experienced marine biologists and naturalists using fast RIB boats from Waianae Boat Harbor.