Niihau 3-Tank Boat Dive with Fathom Five in Koloa, HI
Difficulty
challenging
Duration
11 hours
Fitness Level
Participants should be in good physical condition, comfortable with multiple deep dives and extended surface intervals.
Overview
Dive beyond the usual in Hawaii with Fathom Five. Three guided dives off Niihau offer crystal-clear waters, vibrant reefs, and an exclusive boat experience from Koloa.
Nii hau 3-Tank Boat Dive
Mid-May through September • Monday & Thursday • 11 hours • Ages 15+
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About This Adventure
Experience an unforgettable diving adventure with Fathom Five, exploring the stunning Forbidden Island of Niihau. Enjoy three guided dives in pristine waters, complemented by a light breakfast and snacks. Our custom-built boat ensures comfort and exclusivity, making this a unique opportunity to discover Hawaii's underwater beauty with a passionate crew.
Our custom built boats were built in Hawaii specifically for Hawaiian waters!
Times and Duration
- Mid May through September – Monday & Thursday at 6am
- 11 hours
Included
- 3 dives
- full site briefing
- guide-led tour
- light breakfast
- snacks & drinks
- light lunch
- air tanks & weights
About
Fathom Five is extremely proud to offer a one-of-a-kind adventure with our incredibly talented crew to the Forbidden Island of Niihau, featuring some of the best diving in the state! Our 38′ dive boat enables us to get you to Nii hau and it’s moon shaped cousin, Lehua in more comfort with fewer people than anyone else on the island! Full shade options, state of the art navigation systems, CD/DVD players, even 2 camera rinse tanks!
First dive from 85′ to 105′, second dive 60′ to 85′, third dive 45′ to 65′.
Boat Dive Rental Equipment:
- Full package: Mask, fins, snorkel, regulator, weight integrated BCD, 5mm full or short wetsuit
- Ala Carte Rental Pieces: Mask, fins & snorkel. Regulator. Weight integrated BCD. 5mm full or short wetsuit.
We are gear nerds at Fathom Five. We love SCUBA and all it’s toys. As a result of this passion we keep our equipment new, clean and in perfect working order. We rent the high quality gear so you can feel safe and have fun while diving but we also have a tendency to sell some of the stuff too.
Refresher Option
For the certified diver who hasn’t dived in more than 2 years. Add this refresher option to any dive. Includes an 30 minutes academic review with an instructor discussing safety procedures, gear, hand signals, etc., followed by the dive experience of your choice. Refresher Option must check-in 30 minutes prior to standard dive check-in time.
Adventure Tips
Book Early for Limited Spaces
Trips run only Mondays and Thursdays mid-May to September with limited diver capacity; secure your spot well in advance.
Be Prepared for a Full Day
The entire adventure takes about 11 hours, so bring a change of clothes and be ready for an active day on the water.
Certification Required
All participants must be certified divers aged 15 or older; refresher courses are available for those who haven’t dived recently.
Pack Reef-Safe Sunscreen
Protect yourself and Hawaii’s delicate reef ecosystems by using only reef-safe, biodegradable sunscreen during surface intervals.
Local Insights
Wildlife
- Hawaiian green sea turtles
- humuhumunukunukuapua'a (reef triggerfish)
History
Niihau is a privately owned island with restricted access, preserved to protect its natural environment and cultural heritage.
Conservation
Fathom Five emphasizes sustainable diving practices, including reef-safe sunscreen use and strict adherence to no-touch policies to protect fragile reef ecosystems.
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Adventure Hotspots in Lihue
Frequently Asked Questions
Recommended Gear
5mm Wetsuit
Provides thermal protection for prolonged dives in Hawaiian waters, especially at deeper depths.
summer specific
Mask, Fins & Snorkel
High-quality, well-fitting gear enhances comfort and underwater visibility.
Reef-Safe Sunscreen
Protects your skin while preserving delicate coral reef ecosystems during surface intervals.
summer specific
Dive Computer
Helps monitor depth and dive time for safe ascent profiles on multi-tank days.