Kailua-Kona
The nocturnal manta experience from below the surface is even more extraordinary than snorkeling — mantas circle in feeding spirals within arm's reach at 20–30 foot depth. Multiple mantas typically present; the record in a single evening is 78. The best night dive in the Pacific.
Book with Jack's Diving Locker or Kona Honu Divers. From $120–150/person. Open Water certification required. Equipment rental available.
Best May–October (calmer sea conditions). Cancelled if surface conditions exceed 3 feet. Cold thermocline at 45–50°F below 40ft — 3mm wetsuit minimum.