When to visit Indonesia: the seasons, region by region
Two seasons, regional variation, and the months each part of the country rains.
By the Local SIM Indonesia team, checked October 3, 2026
The short answer
Most of the country, Bali and Java included, is dry from April to October and wet from November to March; the east is often wet from April to August. Temperatures change little: 28 degrees on the coasts, cooler in the mountains, with humidity from 70 to 90 per cent. Heavy rain can flood Jakarta and parts of Bali, and volcanic ash can affect flights.
- Dry season: April to October in most of the country, Java and Bali included.
- Wet season: November to March in most of the country; the UK advice puts eastern Indonesia's wet season usually from April to August.
- Temperature: about 28 degrees on the coastal plains and cooler higher up; humidity runs from 70 to 90 per cent.
- Flooding: heavy rain can flood Jakarta and parts of Bali, and landslides can come with little warning.
- Volcanoes: 129 active volcanoes, and ash can disrupt flights, including on Bali; exclusion zones can change at short notice.
- Haze: dry-season fires, most severe from April to September, can lower air quality, and pollution from burning rises especially from June to October.
Checked October 3, 2026
The regions, month by month
Java and Bali (most of the country)
- The seasons
- Dry from April to October; wet from November to March
- Watch for
- Flooding in Jakarta and parts of Bali in the wet months
Eastern Indonesia
- The seasons
- Often wet from April to August
- Watch for
- Seasons out of step with Java and Bali
The mountains
- The seasons
- Cooler by about one degree for every 90 metres up
- Watch for
- Night frosts in the high interior
Near an active volcano
- The seasons
- Activity can change at any time
- Watch for
- Ash can affect flights and regional airports
Region by region
Bali
The ministry's weather pages include Bali in the national pattern: dry from April to October, wet from November to March. In the wet months, parts of the island can flood, so keep an eye on the forecast.
Jakarta
Java sits in the same April to October dry window; in the wet season, flooding can hit Jakarta, and the toll road to Soekarno-Hatta airport is among the routes the UK advice names.
Yogyakarta
Yogyakarta is on Java, inside the April to October dry stretch; Mount Merapi, on the border with Central Java, is one of the volcanoes with ongoing activity to check.
Lombok
Lombok lies east of Bali, where the different clock of eastern Indonesia begins: the UK advice puts the east's wet season usually from April to August.
The bottom line
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The rains do not arrive everywhere at once: check the wet months of each stop, then plan the route around them, with the forecast and the alerts on a working connection.
Buy on VietSIMQuestions
What is the best time to visit Bali?
For Bali, the dry months from April to October sit inside the national pattern, and the wet season runs from November to March, when heavy rain can cause flooding in parts of the island. The island stays warm all year, so the choice is mostly about rain.
What is the Bali weather like in the wet season?
Warm and wet. The wet season runs from November to March, heavy rains are common throughout the year, and humidity runs from 70 to 90 per cent; in the wet months, parts of Bali can flood.
When is the dry season in Indonesia?
In most of the country, Java and Bali included, from April to October; the wet season runs from November to March. The ministry notes that global warming has made the seasons less predictable.
Which months are wet in eastern Indonesia?
The east can run out of step with Java and Bali: the UK advice puts eastern Indonesia's wet season usually from April to August.
Can volcanic ash affect flights?
Yes: ash clouds can affect flight schedules and the operation of regional airports, so check with your airline; the country has 129 active volcanoes, and exclusion zones can change at short notice.
Sources
Where the facts on this page come from.
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