Indonesia weather
Our guide to the weather in Indonesia during September
We've looked at the most up-to-date weather data for Indonesia, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Indonesia weather in September.
How hot is it in Indonesia during September?
Expect heat in Indonesia during September. The temperature hits about 32℃ during the day, falling away to a balmy 24℃ at night. The UV index will be high at this time of year, so protection against skin and eye damage is needed. Try to limit exposure between 10am and 4pm. Apply broad spectrum SPF 30+ sunscreen every few hours, even if it's cloudy, or more frequently after sweating or swimming, and wear UV-blocking sunglasses too, and bear in mind that bright surfaces, such as sand and water increase UV exposure.
Does it rain in Indonesia during September?
On average, there will be 2 rainy days during the month, amounting to 27.6mm in total. That's much drier than we see in England during August, and therefore not something to be concerned about. You're not likely to see a thunderstorm during your trip.
Is it windy in Indonesia during September?
You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in September. With moderate humidity, any breeze will have a welcome cooling effect.
Weather in Indonesia
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