Komodo

The park is dived two ways. Day boats leave Labuan Bajo in the morning, steam an hour or two to the central island group, fit in three dives and are back at dusk; the far south is beyond comfortable reach that way, so it belongs to liveaboards and the occasional long charter. Either way the day is set by the tide table rather than the clock. Guides pick sites for a particular slack or a particular direction of flow, and a plan can be rewritten on the water when the current arrives early.

North and south feel like separate destinations. The northern sites are warmer and generally clearer, built around seamounts and pinnacles standing in open water, where the fish stack up on the current-facing side. The south is where the cold arrives: green with plankton, cool enough that regulars dive hooded and in thicker suits, and lined with soft-coral slopes and dark-sand bays. Between them run the channels, and it is the channels that make the reputation.

Diving those channels is what people come back for. Entries are negative and immediate, the boat follows bubbles instead of sitting on a mooring, and a dive can cover a lot of ground while you hold still. The current does not only run along the reef; it can push down as well, so briefings cover what to do if the bottom starts dropping away beneath you. Topside gives the trip an unusual second half, with ranger-guided walks to see the dragons and the ridges above the anchorages.

This suits divers with drift experience and a settled sense of where the reef is, and it rewards good buoyancy and a willingness to be moved. Courses do run from Labuan Bajo on sheltered reefs near town, but the pinnacles are not where you learn, and most operators want an SMB on you for blue-water pickups. Every month is diveable: June through October rate highest, on the hardest upwelling, while the wetter turn of the year is warmer and greener and southern crossings depend more on the weather.