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
30m
Type
Boat
Typical Visibility
21m
Conditions Summary
Best time today
2PM - 3PM
FAIR
Best day in forecast
Monday
POOR
2026-04-06
Community-reported visibility
n/a
Warnings for today
High waves expected
Strong surge expected
Strong winds expected
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.
