Keauhou
Pacific manta rays with wingspans up to 18 feet perform feeding rolls through plankton-rich water illuminated by boat lights — and you float on the surface as they rise toward your face. Sighting rate is 90%+. The most magical wildlife encounter in all of Hawaii, full stop.
Book with Manta Ray Advocates Hawaii or Jack's Diving Locker. From $80–120/person for snorkeling. Depart at sunset, return by 9pm. Book 1–2 weeks ahead. Book early in your stay for rebooking flexibility.
Tours run in conditions under 3-foot swells. Summer is most reliable. Mantas are present year-round.