Where is Indonesia? Indonesia lies along the equator, and its climate tends to be relatively even year-round. Indonesia has two seasons—a wet season and a dry season—with no extremes of summer or winter. For most of Indonesia, the dry season falls between May and October with the wet season between November and April.
How’s the climate in Indonesia? Indonesia’s climate is almost entirely tropical, dominated by the tropical rainforest climate found in every large island of Indonesia. The tropical monsoon climate predominantly lies along Java’s coastal north, Sulawesi’s coastal south and east, and Bali, while the tropical savanna climate lies in isolated parts of Central Java, lowland East Java, coastal southern Papua and smaller islands to the east of Lombok. More cooling climate types do exist in mountainous regions that are 1,300 to 1,500 metres (4,300 to 4,900 feet) above sea level. The oceanic climate (Köppen Cfb) prevails in highland areas adjacent to rainforest climates, with reasonably uniform precipitation year-round. In highland areas near the tropical monsoon and tropical savanna climates, the subtropical highland climate (Köppen Cwb) is prevalent with a more pronounced dry season.
According to Köppen-Geiger climate classification map for Indonesia, some regions, such as Kalimantan and Sumatra, experience only slight differences in rainfall and temperature between the seasons, whereas others, such as Nusa Tenggara, experience far more pronounced differences with droughts in the dry season, and floods in the wet. Rainfall is plentiful, particularly in West Sumatra, West Kalimantan, West Java, and Papua. Parts of Sulawesi and some islands closer to Australia, such as Sumba are drier.
If I go there to sail, what is the water temperature of Indonesia?
The almost uniformly warm waters that constitute 81% of Indonesia’s area ensure that temperatures on land remain relatively constant. The coastal plains average 28 °C (82.4 °F), the inland and mountain areas, 26 °C (78.8 °F), and the higher mountain regions, 23 °C (73.4 °F). The area’s relative humidity ranges between 70 and 90%. Winds are moderate and generally predictable, with monsoons usually blowing in from the south and east in June through October, and from the northwest in November through March. Typhoons and large scale storms pose little hazard to mariners in Indonesian waters; significant dangers come from swift currents in channels, such as the Lombok and Sape straits.
