Adventure brief
Two Tank Lava Tube, Reef and Intro to Scuba Dives
Dive into the dramatic lava tubes and vibrant reefs of west Oahu with Dolphin Divers. Encounter green sea turtles and underwater caverns on this guided Two Tank scuba adventure suitable for all skill levels.
Off the west coast of Oahu lies Waianae, a stretch of coastline distinguished by clearer waters and less crowded reefs than the island’s eastern side. Here, Dolphin Divers operates an immersive Two Tank Lava Tube, Reef, and Intro to Scuba Dives experience, centered around the unique Makaha Caverns. This site is famous for its underwater lava tubes formed from ancient volcanic flows—a rare geological feature underwater—and the frequent presence of green sea turtles resting at cave entrances.
Dolphin Divers provides a comprehensive dive package that covers all equipment and transportation, making it accessible for first-timers and seasoned divers alike. With a maximum ratio of six divers to one guide, safety and personalized attention are priorities. The dive depths typically reach up to 40 feet, offering comfortable conditions for those returning to the sport or new to it.
For beginners and younger divers starting at age 12, instructor-led supervision ensures a secure and seamless introduction. The highlight is navigating the caverns’ natural underwater passageways, where the low light and volcanic formations create an otherworldly atmosphere. Green sea turtles, the region’s iconic marine creatures, are almost guaranteed companions during these dives, allowing for close observation without disturbance.
Beyond the dive, transportation from Ko Olina resorts and refreshments are included, delivering a full-service adventure. Dolphin Divers stands out in Oahu’s outdoor recreation landscape by focusing on this signature site at Makaha, offering an intimate connection with a lesser-explored segment of the Hawaiian seascape. The company’s dedication to safety, local knowledge, and environmental respect makes it a go-to choice for divers seeking both thrill and stewardship.
For visitors looking to deepen their understanding of Oahu’s marine geology and wildlife, this dive combines education with exhilarating underwater exploration, complementing the island’s broader outdoor offerings with an unforgettable aquatic journey.
Adventure tips
Plan your experience.
Curated tips for an optimal adventure.
- 01Arrive Well Rested and Hydratedessential
Being well-hydrated and rested before your dive helps reduce the risk of decompression sickness and improves overall comfort underwater.
- 02Listen Closely to Dive Briefingsessential
Pay attention to your guide’s instructions on navigating lava tubes safely to avoid any disorientation or accidental contact with fragile formations.
- 03Bring a Dive Log or Certification Cardinfo
If you’re certified, carrying your certification and logbook streamlines the check-in and equipment fitting process.
- 04Protect Marine Lifewarning
Maintain neutral buoyancy to prevent stirring up sediment or touching the sea turtles, ensuring minimal impact on the underwater environment.
Recommended gear
What to bring.
Wetsuit (3mm or lighter)
Keeps you comfortable and protected in the warm but occasionally cool ocean waters of Oahu.
summerEssentialDive Computer
Monitors depth and time underwater to ensure safe dives—provided by Dolphin Divers but useful to bring your own if available.
EssentialReef-Safe Sunscreen
Protects your skin without harming the coral and marine life around Makaha Caverns.
summerEssentialUnderwater Camera or GoPro
Allows you to capture photos and videos of lava tubes and sea turtles during your dives.
Local insights
Context for the journey.
Nearby secrets
Makaha Blowhole viewpoint, Kaena Point trailhead nearby
Local fauna
Green sea turtles, Hawaiian cleaner wrasse
Historic heritage
Makaha Caverns formed from historic volcanic activity unique to the west Oahu coast, offering habitat for endemic Hawaiian species.
Mindful exploration
Dolphin Divers emphasizes minimal impact diving practices, supporting coral reef health and sea turtle protection through education and guided tours.
Photography tips
Capture the moments
- Viewpoints
- Entrance of Makaha Caverns, Inside lava tubes, Coral reef rims
- Subjects
- Green sea turtles, Underwater lava formations, Colorful reef fish
- Best times
- Mid-morning, Early afternoon, Late morning
Frequently asked questions
Before you go.
Do I need prior scuba experience to join these dives?
No, Dolphin Divers offers intro dives with instructor supervision for beginners over age 12.
What equipment is included with the dive?
All necessary scuba gear including tanks, regulators, wetsuits, and dive computers are included.
Are the dives suitable for children?
Yes, children 12 and older can participate in intro dives with direct instructor supervision.
How deep do the dives go?
The maximum depth is around 40 feet, making it accessible for new and experienced divers.
Is transportation provided from nearby hotels?
Yes, round-trip transportation is included from Ko Olina hotels and resorts.
What wildlife might I see on the dive?
Green sea turtles are frequently seen, along with diverse reef fish and coral formations.