Warm waters and seabed rich in wonders, Indonesia is the diving destination par excellence. To take full advantage of your forays into the Indian Ocean, it is best to leave during the dry season, that is to say between April and October. It is during this period that you will benefit from ideal visibility between 10 and 30 meters.
Sumatra, Borneo or the island of Bintan are located in an equatorial zone. Like the famous Bali, they also offer beautiful diving conditions. As far as the water temperature is concerned, don't worry: the average annual temperature is 27°C everywhere in Indonesia, except for the depths of Nusa Penida, which can drop to 20°C.