Hanauma Bay Nature Preserve is a pristine marine ecosystem and protected conservation area, home to over 450 species of tropical fish and a comprehensive coral reef system within a stunning volcanic crater bay. This world-renowned snorkeling destination requires advance reservations that open exactly two days ahead at 7:00 AM HST and fill up quickly, as the preserve limits daily visitors to protect its delicate ecosystem. All visitors must watch a mandatory 9-minute educational video covering marine life, park preservation rules, and safety guidelines before accessing the beach, emphasizing the importance of not touching or walking on the coral reefs, which is prohibited by law.
The preserve is open Wednesday through Sunday from 6:45 AM to 4:00 PM, with last entry at 1:30 PM, and closes Monday and Tuesday for conservation purposes. Entrance fees are $25 per person for non-resident adults, while children 12 and under enter free, as do active Oahu military members and local residents with proper state ID. Parking costs $3 for visitors and $1 for locals. The bay's shallow coral reefs teem with colorful tropical fish, creating an unparalleled snorkeling experience in crystal-clear waters protected by the crater's natural walls. The vibrant marine life sanctuary offers visitors a rare opportunity to observe Hawaii's underwater world up close while learning about marine conservation and reef protection.
Due to the bay's popularity and strict reservation system, visitors should plan ahead and book their slots as soon as they become available two days in advance. Since Hanauma Bay has no food or drink facilities on-site, visitors can stop at nearby Koko Marina Center, located just 20 minutes from Waikiki along the route to the bay. The center features multiple dining options including Kona Brewing Company with marina views, Loco Moco Drive Inn for local plate lunches, Harbor Village Cuisine for Chinese fare, Zippy's for local comfort food, and HanaPa'a Market for island favorites. The preserve's conservation-focused management, including mid-week closures and visitor limits, ensures the long-term health of this irreplaceable marine habitat while providing one of Oahu's most spectacular underwater experiences.
