Blue Hole is a famous dive site in Indonesia that features a large cave starting at 127m/417ft. The cave itself and its entrance are quite wide and lead to a dome with many small pinnacles, a healthy reef, and an arch. It is very dangerous to dive under the arch, and only highly experienced technical divers and deep divers can do it.
When To Go Diving
It is possible to dive at Blue Hole year-round, but the conditions are better from April to November. The average water temperature varies between 27-30C/81-86F, and the air temperature averages 26-28C/79-82F.
What to see
Blue Hole has a lot of Napoleon wrasses, jacks, surgeonfish, and sweetlips as permanent residents. Other species include sea turtles, lionfish, clownfish, Spanish dancers, and parrotfish.