Dive-site story
Located off the rugged south coast of Lanai, Double Arches is characterized by dramatic volcanic geology. The site features two large, natural lava tube arches that divers can navigate through, with sunlight piercing down through overhead openings. Surrounding the formations, hard coral gardens slope onto sand patches where resting rays and whitetip reef sharks frequently take shelter.
Two distinct volcanic lava arches wide enough for easy swim-throughs
Frequent encounters with whitetip reef sharks resting on the sandy floor beneath overhangs
Hawaiian green sea turtles grazing on the surrounding basalt reef structure
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Summer and early autumn bring the calmest sea conditions and lowest wind along the Lanai coast.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Whitetip Reef SharkTriaenodon obesus | Common | ||||||||||||
| Green Sea TurtleChelonia mydas | Common | ||||||||||||
| Spotted Eagle RayAetobatus narinari | Seasonal | ||||||||||||
| Hawaiian TurkeyfishPterois sphex | Common | ||||||||||||
| Yellow TangZebrasoma flavescens | Common |
Marine forecast
