Advanced Indonesia
Komodo
Cold water and warm water in the same park, and enough current to respect it
The park sits right at the chokepoint between two seas that empty into each other with every tide. Everything that makes Komodo famous (the marine life, the manta rays, the schools of fish) is a consequence of that flow. So is its reputation as a destination where you don't improvise.
In this entry you'll find out why Komodo's currents are what they are, how the north and south of the park have different temperatures and ecosystems, when to go, where the manta rays are, and what real experience you need before dropping into a channel here.
This is probably the destination in Indonesia where the most divers discover that their certified level and their real level don't match. It's also one of the country's most consolidated marine national parks.
Geography and access
The national park occupies a group of islands between two larger islands of the Indonesian archipelago, in the strait that connects the Flores Sea to the north with the Indian Ocean to the south.
That strait is narrow, and the difference in sea level between the two sides during the tidal cycle pushes enormous volumes of water through narrow channels. The result is currents that in some spots comfortably exceed what a diver can swim against, plus vertical components (upwelling and downwelling) which are the part that really has to be respected.
The thermal contrast defines the diving. In the north, water arrives warm from the Flores Sea, with classic hard coral reefs. In the south, cold water rises from the Indian Ocean through upwelling: the temperature can drop several degrees all at once, the water turns greener, and a different ecosystem appears, with dense soft coral, plenty of filter-feeding life, and quality macro.
Logistics are organized from the park's gateway city, with daily boat trips to nearby sites and multi-day liveaboards to reach the south, which is too far away for a single day trip.
Access is a domestic flight from Bali or Jakarta to the gateway city's airport, and from there straight onto a boat.
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