Lehua Crater is a crescent-shaped volcanic crater off the northern coast of Niihau, accessible as a day trip from Kauai. Known for dramatic underwater topography and diverse marine life, this site offers vertical walls, swim-throughs, and vibrant coral gardens in typically clear water conditions.
Difficulty
Intermediate
Max Depth
100 ft
Type
Boat
Typical Visibility
70 ft
Conditions Summary
Best time today
8AM - 11AM
BAD
Best day in forecast
Today
BAD
2026-01-29
Community-reported visibility
n/a
Warnings for today
High waves expected today
Strong surge expected today
North-facing crescent islet exposed to north through west swells. South swell wraps around. Strong currents common; diving limited to summer. Timing surge at keyhole arch is critical.
