Big Island
Au Au Crater Dive
Ancient Volcanic Crater Transformed into Advanced Diving Paradise
Why Au Au Crater?
Located off Kona's coast, this submerged volcanic crater offers advanced divers an extraordinary geological adventure at depths of 60-100 feet. The dramatic bowl-shaped structure features steep walls covered in vibrant coral and sponges, creating a unique diving environment. From dramatic underwater topography to encounters with pelagic species, this site delivers an advanced diving experience featuring Hawaii's ancient volcanic history.
Diving Experience
This advanced site demands deep diving experience and excellent buoyancy control. Trips depart from Honokohau Harbor, with morning dives offering optimal conditions. The crater's dramatic walls provide multiple exploration zones, while deeper waters attract pelagic species. Boat access only, with typical dive times of 30-40 minutes.
Responsible Diving
Plan deep dives according to experience level and conditions. Navigate the crater's steep walls with precision buoyancy control. Maintain awareness of depth and current changes near rim sections. Complete mandatory safety stops on every dive.
Quick Facts
Location: Kona Coast, Big Island
Depth: 60-100 ft (Advanced)
Visibility: 100+ ft
Marine Life: Sharks, Rays, Pelagics, Fish
What You’ll See
Feature: Ancient volcanic crater walls
Reef Fish: Butterflyfish, angelfish, wrasses
Hidden Creatures: Nudibranchs, eels, crabs
Special Visitors: Manta rays, pelagic species
Frequently Asked Questions
What certification is needed?
Advanced Open Water minimum required
Best time to dive?
Morning offers calmest conditions
Are currents strong?
Can vary significantly near rim
Typical dive length?
30-40 minutes depending on depth
Ready to Explore?
Experience this rare combination of volcanic geology and marine diversity. Advanced divers discover an underwater world where Hawaii's ancient history meets vibrant marine life.