Indonesia: time, weather and travel guide

Indonesia is a vast archipelago, a chain of thousands of islands stretching along the equator between the Indian and Pacific oceans. Most visitors know Bali, but the country also takes in the volcanoes and temples of Java, the rainforests of Sumatra and Borneo, the dragons of Komodo and the reefs of Papua. It is hot all year, the rain depends on the island, and the clock changes as you travel east, across three time zones.

Indonesia for visitors

Distances are huge, so most visitors choose two or three regions rather than trying to see everything.

Java

Java is the most populated island and the political and economic centre. Jakarta, on the north-west coast, is the capital and largest city, a huge metropolis that most travellers pass through on the way elsewhere. Yogyakarta, in the centre of the island, is the cultural heart of Java, with the great Buddhist temple of Borobudur and the Hindu temples of Prambanan nearby. Further east, the volcanic landscapes of Mount Bromo and the Ijen crater draw people for sunrise hikes.

Bali, Lombok and the islands to the east

Bali is the most visited island, known for its Hindu temples, rice terraces, surf beaches and the arts and crafts around Ubud. Next door, Lombok and the small Gili islands are quieter, with Mount Rinjani for trekkers. Further east, Flores and Komodo National Park offer Komodo dragons, boat trips and some of the best diving in the region.

Sumatra, Borneo, Sulawesi and Papua

Sumatra has orangutans in the rainforest around Bukit Lawang and the huge crater lake of Toba. Kalimantan, the Indonesian part of Borneo, is a place for river trips into the forest. Sulawesi is known for the culture of Tana Toraja in its highlands and for diving in the north. Raja Ampat, off the western tip of Papua, has some of the richest coral reefs in the world, and is remote and slow to reach.

Between islands, domestic flights are the usual way to travel, with ferries and boats for shorter crossings and island-hopping. Java has a good railway network linking its main cities. On Bali and Lombok, most visitors hire a car with a driver or use a scooter, and ride-hailing apps work in the cities.

Time in Indonesia

Right now Indonesia uses 3 UTC offsets, and none of them changes during the year: the country does not use daylight saving time. From west to east:

• Western Indonesia Time (WIB), Asia/Jakarta: UTC+7. It covers Sumatra, Java and the western and central parts of Kalimantan (Borneo), which use the Asia/Pontianak zone in the tz database.
• Central Indonesia Time (WITA): UTC+8. It covers Bali, Lombok and the other Lesser Sunda islands such as Flores and western Timor, Sulawesi, and the eastern and southern parts of Kalimantan.
• Eastern Indonesia Time (WIT): UTC+9. It covers the Maluku islands and Papua.

So a flight from Jakarta to Bali crosses a time zone, and Bali is an hour ahead of the capital. Check which zone your departure and arrival times are in when you plan connections.

Right now Jakarta is the same time as Bangkok, 1 hour behind Singapore, 7 hours ahead of London and 4 hours behind Sydney. Bali and the rest of Central Indonesia Time share the same offset as Singapore and Kuala Lumpur. Because Indonesia never changes its clocks, the difference with Europe and parts of Australia shifts by an hour when they switch to and from summer time.

Climate and weather

Almost all of Indonesia has a tropical climate: hot and humid at sea level all year, with little change in temperature from month to month. The mountains are much cooler, and nights on the high volcanoes can be cold. What changes through the year is the rain, which follows the monsoons.

The two seasons

For Java, Bali, Lombok and the islands to their east, the year has two seasons. The wet season, driven by the north-west monsoon, runs roughly from November to March, with heavy downpours and humid, cloudy days. The dry season, when drier winds blow from Australia, runs roughly from May to September, with sunny days and less humidity. April and October are transition months. The further east and south you go, the drier and longer the dry season tends to be, so the islands around Komodo and Timor are among the driest parts of the country.

The pattern is not the same everywhere. Much of Sumatra and Kalimantan, close to the equator, has rain in every month, often with two wetter periods a year rather than one. Parts of Maluku have the opposite timing to Java, with their wettest months in the middle of the year.

Jakarta

In Jakarta, average highs stay between 31°C and 33°C all year, and the city gets about 1,933 mm of rain. In Jakarta, February is the wettest month and August the driest. Heavy rain floods parts of the city in most wet seasons. The Jakarta guide has the full month-by-month table.

Singapore, just north of the equator, has rain spread through the year, while Jakarta has a much clearer dry season in the middle of the year, as do Bali and the islands to the east.

Indonesia sits on the Pacific Ring of Fire, and many of its best-known landscapes are active volcanoes; an eruption can occasionally disrupt flights for a few days.

Best time to visit Indonesia

For Bali, Lombok, Java, Komodo and most first trips, the dry season, roughly May to September, is the best time to visit: sunny days, calmer seas for boat trips and the best conditions for climbing volcanoes such as Rinjani and Bromo. It is also the busiest time, especially in Bali in July and August, when European summer holidays bring the biggest crowds.

The shoulder months around April, May and late September to October are often the best balance of weather and crowds. The wet season is the quiet season: rain usually comes in heavy bursts rather than all day, and it is still possible to enjoy Bali and Java, but boat trips around Komodo and treks on the volcanoes can be affected, and some trekking routes close.

During Ramadan, which moves through the year, many Muslims fast from dawn to sunset. Life continues as normal in Bali, which is mostly Hindu, but in more conservative areas some restaurants close during the day. The holiday at the end of Ramadan is the busiest travel period of the year, with full planes, trains and ferries. In Bali, Nyepi, the Day of Silence, shuts down the island for a full day, airport included; it falls in March or April.

Practical facts

• Capital: Jakarta.
• Population: about 281 million (UN World Population Prospects 2024, 2023 estimate).
• Currency: Indonesian rupiah (IDR). Cards are widely accepted in hotels, malls and tourist areas of Bali and Java; carry cash for small shops, warungs (local eateries), markets and remote islands, where cash machines can be scarce.
• Language: Indonesian (Bahasa Indonesia). English is widely spoken in tourist areas of Bali and in hotels, less so elsewhere. Terima kasih (thank you) and selamat pagi (good morning) are a good start.
• Calling code: +62.
• Tipping: not traditionally expected, but common in tourist areas; many restaurants and hotels add a service charge.
• Dress: cover your shoulders and knees at mosques and temples. In Bali, a sarong and sash are required at temples and are often lent at the entrance.
• Driving: on the left.
• Emergency numbers: 110 or 112 for the police and general emergencies, 118 or 119 for an ambulance, and 113 for the fire service ([1]).

Plan your trip with hoyoopin

• Jakarta city guide: the wet and dry seasons month by month, flooding and air quality, what to pack and how Indonesia's three time zones work.
• World Clock: Jakarta, Bali and Jayapura time next to your own.
• Weather: live conditions and the forecast for Bali, Yogyakarta or any other town in Indonesia.
• Asia: time zones and key facts for every country on the continent.
• Further reading: the countries with the most monsoon rain and our guide to time zones and UTC.

Frequently asked questions

How many time zones does Indonesia have?

Indonesia uses 3 time zones: Western Indonesia Time (UTC+7), Central Indonesia Time (UTC+8) and Eastern Indonesia Time (UTC+9). None of them uses daylight saving time.

Is Bali on the same time as Jakarta?

No. Bali is on Central Indonesia Time, UTC+8, while Jakarta is on Western Indonesia Time, UTC+7, so Bali is one hour ahead.

When is the rainy season in Bali?

Roughly from November to March, during the north-west monsoon. The dry season, from about May to September, is the main tourist season.

Does Indonesia have daylight saving time?

No. The clocks stay the same all year in all three zones.

Which side of the road do people drive on in Indonesia?

On the left.

Sources

1. Indonesia Travel (Ministry of Tourism): Staying safe in Indonesia: police and general emergencies 110 or 112, ambulance 118 or 119, fire 113.