KOLOA SCUBA FIELD GUIDE
Ho'onui to the South: Two-Tank Exploration of Kauai’s Southern Reefs
A four-hour, two-tank boat dive out of Kukui'ula for certified divers that visits less-traveled southern-coast reefs and offers crew-led briefings, snacks, and included equipment.
Ho'onui to the South: Two-Tank Exploration of Kauai’s Southern Reefs.
Adventure brief
Ho'onui to the South: Two-Tank Exploration of Kauai’s Southern Reefs
Dive Kauai’s Two Tank South Island Boat Adventure takes certified divers aboard the elite Ho'onui catamaran to explore Kauai’s southern coastline, offering small-group diving, expert guidance, and up-close encounters with vibrant reefs and Hawaiian green sea turtles.
Kauai's southern coast offers some of the most captivating marine diving experiences in Hawaii, and Dive Kauai’s South Island Boat Adventure Dive capitalizes on this rich underwater world with precision and passion. Operating out of Koloa, Hawaii, this expertly guided two-tank dive aboard the sleek 26-foot SeaCat catamaran "Ho'onui" is tailored exclusively for certified divers seeking an intimate and immersive encounter with the island’s vibrant reef ecosystems.
Dive Kauai stands apart by maintaining small group sizes capped at six divers per trip, fostering a personalized journey with expert dive masters who provide detailed briefings on both dive sites and marine biology. The experience unfolds without hidden fees—the gear you need is included—earning this operation a reputation for straightforward, high-value adventures.
The South Island dive sites are distinctive, offering an alluring mix of colorful coral gardens, cavernous formations, and sand channels beyond the reach of bigger tour boats. Expect to swim alongside Hawaiian green sea turtles (Honu), schools of reef fish flaunting tropical hues, and, if luck favors, playful dolphins in the distance. The waters here, ranging between 60 to 90 feet deep, both challenge and reward divers with stunning underwater clarity and diverse marine habitats.
Historically, Kauai’s reefs have long supported Native Hawaiian fishing traditions, and the protection of these environments remains a priority. Dive Kauai operates with a commitment to sustainability, emphasizing respectful wildlife interaction and reef preservation.
Whether you’re sharpening your dive skills or seeking the rare thrill of lesser-known sites, this boat-based adventure is an asset to Kauai’s outdoor recreation scene. The knowledgeable crew, top-tier vessel, and spectacular marine settings coalesce into a dive that redefines what it means to experience Hawai‘i beneath the surface.
For those staying in Koloa or visiting the nearby city of Lihue, this dive offers a compelling reason to add underwater adventure to your Kauai itinerary.
Route Schematic
Itinerary & Route Schematic
The outing departs from Kukui'ula and runs two dives along select sites of Kauai’s southern coast, focusing on reefs and offshore features.
Kukui'ula Small Boat Harbor
Meeting and embarkation point for departure to the South Island dive sites.
South Island — Dive 1 (Reef)
A first guided dive at one of the selective reef sites along Kauai’s southern coast to observe reef fish and Honu.
South Island — Dive 2 (Cavern or Offshore Feature)
A second guided dive that may visit offshore caverns or a different reef pocket, again selected for quality and relative seclusion.
Return to Kukui'ula
Transit back to the harbor and disembarkation after the two-tank outing.
This trip is reserved for certified divers and operators may adjust sites or the itinerary; participants should heed the operator's certification and experience requirements and be prepared for route or schedule changes for safety.
What the day feels like
What the trip feels like
Expect a focused, high-caliber outing: divers meet at the harbor, board the Ho'onui, receive concise site and marine-biology briefings, and complete two guided dives—sharing a small-boat rhythm that emphasizes time in the water, careful route selection along the south shore, and close observation of reef life.
THE VESSEL
Ho'onui: a smooth, purpose-built dive platform
The trip runs aboard the Ho'onui, Dive Kauai’s premium SeaCat catamaran designed to deliver stable, comfortable access to less-traveled sections of Kauai’s southern coast and make two-tank diving efficient and focused.
THE DIVES
Two-tank exploration of reefs and caverns
This two-tank South Island adventure centers on vibrant reef systems and offshore caverns along Kauai’s south shore, with opportunities to see reef fish, Hawaiian green sea turtles, and other marine life at varied depths.
THE SERVICE
Small groups, expert briefings, no surprise gear fees
Dive Kauai limits boats to intimate groups, provides site and marine-biology briefings, serves snacks and beverages, and includes necessary diving equipment with no additional charge.
Suitability
Who it's for
Who this trip suits — and who should look elsewhere.
Practical planner
Details to review before reserving
Dive Kauai provides all necessary diving equipment at no additional charge and offers snacks and beverages during the outing.
Plan for a four-hour outing that includes two dives.
Boats run as small groups to provide focused attention and comfortable diving rotations.
Review cancellation policies before reserving.
Frequently asked questions
Planning Your Outing
Who can join this dive?
This trip is for certified divers only; operators typically expect significant logged experience or a recent dive within six months, though 'All Certified Divers' boats may be offered at certain times.
What is included in the price?
The outing includes two tanks, diving equipment with no additional gear fees, snacks, beverages, and crew-led briefings.
How long does the trip take?
Allocate up to four hours for the Two Tank South Island Boat Adventure.
Where do we meet?
The meeting and departure point is Kukui'ula Small Boat Harbor.
Is there an age limit or junior diver policy?
Divers must be age 10 or older; junior divers ages 10–14 require special accommodation and should be discussed with the operator in advance.
How many divers are on a boat?
Trips are run with small groups, with no more than six divers per boat.
What marine life might we see?
Divers commonly encounter reef fish and Hawaiian green sea turtles, with occasional sightings of dolphins and varied underwater scenery.
What is the starting price?
Pricing begins at $229 plus tax per person.
How this guide was prepared
This field guide is synthesized using verified supplier specifications, route descriptions, and destination data. Some booking links may generate affiliate revenue for ADV Guides.
- Verified: 2026-08-25T00:28:38.291Z
Some booking links may generate revenue for ADV Guides or The Adventure Collective.
Availability, pricing, schedules and operating details can change.
Trip details and contextual sources were reviewed by ADV Guides Editorial.