Indonesia experience moderate climate conditions all throughout the year and the climate is almost entirely tropical. The uniformly warm waters that make up 81% of Indonesia's area ensure that temperatures on land remain fairly constant, with the coastal plains averaging 28 °C, the inland and mountain areas averaging 26 °C, and the higher mountain regions, 23 °C.

There are mainly two seasons in Indonesia - wet and dry - weather conditions may vary from one place to the other, so it is advisable to visit Indonesia depending on the season and reason. Best time to visit Indonesia is during dry season between April and October. The humidity is relatively less and weather is pleasant at this time of the year. Though travel in the wet season is possible in most parts of the archipelago, it can be a deterrent to some activities.