Best 855 things to do in Mililani, HI

See Oahu’s highlights in 9 hours for an easy way to experience the island

Climb, slide, and splash across a 20+ element floating course on the Wai Kai Lagoon

Experience a full day of AquaVenture thrills and lagoon paddling in one easy bundle

Tackle an elevated over-water course with slides and climbs for all adventure levels

Seasonal 4:00pm private whale watch with hydrophone

Sail and snorkel off Waikiki with drinks, snacks, and crew on a couples-only 2-hour charter

Private whale watch and snorkel charter for up to 6 guests from Ko Olina Marina

Take a 50-minute doors-off helicopter flight over Oahu’s top landmarks

Land at a private Waimea Bay overlook on a doors-off helicopter flight

Plant native shoreline species and learn how dunes protect Oahu’s coast in 45 minutes

Snorkel Waimea Bay and ride out to Wana Pauoa with mask and fins included

Cruise from Haleiwa in a group of six to spot migrating humpback whales

All gear included for a two-tank dive suitable for any experience level

Spot whales off Oahu’s North Shore on a scenic boat ride

Discover Waikiki's underwater world on a two-tank dive with all gear included.

Swim with sharks on a cage-free snorkel free dive in a small group

Rent a paddleboard or kayak at Anahulu Stream in Haleiwa

Spot migrating humpbacks with a marine biologist crew on a private 2-hour tour

Spot humpback whales with a biologist-led crew on a comfortable 2-hour boat tour

Explore multiple reefs with marine biologists and enjoy a turtle sighting guarantee on an afternoon snorkel.

Spot humpback whales, then snorkel with turtles and fish in a small group

Witness winter humpbacks at sunset on a small-group biologist-led cruise.

Learn to surf with expert instructors; all skill levels welcome

Jungle off-road thrills, dolphin watching, snorkeling, and a Hawaiian meal