A full-day private boat trip from Kikiaola harbor to Niihau and Lehua Crater, offering world-class snorkeling with monk seals, manta rays, and seabirds—plus on-board lunch and guided marine interpretation.
More ways to explore the area's outdoor wonders
The engine hum fades and the coastline of Kauai slips astern as the boat pushes west toward Niihau and the black-lipped rim of Lehua Crater. Salt air bites the skin, and the first spray of ocean cools the face while seabirds wheel over an extinct tuff cone that holds a hollow blue eye known locally as the “Keyhole.”
Difficulty
moderate
Duration
7 hours
Fitness Level
Moderate fitness required: able to board from a small boat, swim/snorkel for short intervals, and move on a pitching deck
Wildlife
History
Niihau has been privately owned since the 19th century and retains restricted access; Lehua Crater is the eroded remnant of a tuff cone formed by volcanic interaction with sea water.
Conservation
Operators emphasize no-landing rules at Lehua and maintaining distance from endangered monk seals; use reef-safe sunscreen and follow guide instructions to minimize impact.
Reserve your spot on the Private Ni’ihau Scenic Snorkel today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Arrive early to check in
Kikiaola Small Boat Harbor is one mile past Waimea—look for the grey truck by the dock and wetsuits on the door; parking fills quickly.
Use reef-safe sunscreen
Apply reef-safe sunscreen before boarding to protect corals and marine life; reapply as directed between snorkel sessions.
Secure motion-sickness meds
The crossing can be choppy depending on swell—take non-drowsy medication an hour before departure if you’re prone to seasickness.
Keep distance from monk seals
Hawaiian monk seals are protected—observe from the water or boat and never approach, touch, or feed them.
Reef-safe sunscreen
Protects your skin and the reef—apply before boarding and bring extra for reapplication.
Mask and snorkel (optional)
Personal gear often fits better than rental equipment and improves comfort in long snorkel sessions.
Small dry bag
Keeps phone, wallet, and layers dry between snorkel intervals on a wet boat deck.
Light sun layer or rash guard
Protects against sun and wind during transit and reduces chill after getting out of the water.