Dive into Lanai’s volcanic lava tubes with Maui Diamond Sea Sports. Discover the Cathedrals’ breathtaking swim-throughs, vibrant marine life, and chances to spot dolphins on this full-day underwater adventure.
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Difficulty
moderate
Duration
8 hours
Fitness Level
Good overall fitness and comfort in open water recommended, including swimming proficiency and handling variable ocean conditions.
Wildlife
History
Lanai's marine landscape was shaped by ancient lava flows that created the distinctive underwater lava tubes divers now navigate.
Conservation
Maui Diamond Sea Sports actively promotes reef-safe practices and enforces guidelines to minimize diver impact on fragile coral and marine life.
Maui Diamond Sea Sports
Dive into Lanai’s volcanic lava tubes with Maui Diamond Sea Sports. Discover the Cathedrals’ breathtaking swim-throughs, vibrant marine life, and chances to spot dolphins on this full-day underwater adventure.
Maui Diamond Sea Sports in Wailuku, Hawaii operates professional scuba diving and snorkeling charters from Māʻalaea Harbor. The company runs a 46-foot vessel offering private charters with a captain and crew, two-tank dives to Molokini Crater, wreck dives to the Carthaginian II, and trips to Lanai’s Cathedrals, Shark Fin, and Lighthouse. Additional itineraries include Helldiver and Triple Anchors, Mala Pier and Pali, and two-tank dusk and night dives.
Licensed instructors and crew support certified divers of varying experience; the vessel carries dive and safety equipment and provides snacks and beverages on most trips. Reservations are available for morning and afternoon departures and private events for families or groups. The operator emphasizes local knowledge of Maui dive sites, flexible dive planning based on sea and weather conditions, and adherence to marine conservation and safe diving practices. Divers can expect guide-supported briefings, surface interval assistance, and opportunities to see sea turtles, reef sharks, dolphins, abundant reef fish, and macro life such as nudibranchs and octopuses. Snorkelers visit Molokini’s clear crater waters and shoreline reefs for strong visibility and marine encounters. Maui Diamond Sea Sports serves visitors in the Wailuku and Maalaea area for regional dive excursions and private charters. The company follows third-party safety standards and local regulations. Booking information and trip descriptions are available through official listings and reservation partners. This summary factually reflects the business’s vessel size, offered trips, support services, and commitment to safe, guided diving and snorkeling experiences.
Trip schedules and pricing vary by season and availability online.
Vessel Size
46-foot
Spacious boat for private charters
Home Port
Maalaea Harbor
Departures serving Wailuku area
Private Charters
Available
Ideal for families and groups
Popular Trips
Molokini & Lanai
Two-tank, wreck, and night dives
Reserve morning or afternoon trips from Maalaea Harbor — confirm availability, certification requirements, and safety details before booking.
Complete Your Diver Medical Form
Make sure to submit the required medical history form and obtain a physician’s release if needed well before the trip to avoid being unable to dive.
Arrive Early for Check-In
Check-in starts at 6:15 AM; timely arrival ensures the trip departs on schedule and maximizes your dive time around Lanai.
Prepare for Variable Dive Conditions
Dive sites may change based on weather and ocean currents—be flexible and ready to enjoy alternate spots if Lanai conditions aren’t optimal.
Bring Additional Snacks if Needed
While snacks and lunch are provided, feel free to bring extra food that fits in the under-bench dry storage onboard for energy between dives.
Wetsuit (3-5mm)
Protects against cooler ocean temperatures and abrasion inside lava tubes.
Underwater flashlight
Enhances visibility inside shadowed swim-throughs and caves.
Surface marker buoy (SMB)
Important for signaling your position during open water dives around the island.
Reef-safe sunscreen
Protects your skin without harming delicate coral ecosystems when topside.
summer