Weather in Indonesia in January

Indonesia in January typically experiences its wet season, which varies across the islands, but typically means monsoon rains. This is a month to pack light with breathable clothing — and don’t forget waterproof gear for unexpected showers. If you're up to embrace the tropical rhythm (and taking breaks for downpours) here's our guide to the weather in Indonesia in January.

Indonesia in January at a glance

• Temperatures typically range from 75°F to 89°F (24°C to 32°C).
• This month is the peak of the rainy season in Indonesia so you can expect frequent rain.
• You can expect lower costs and fewer crowds, as January is the low tourist season in Indonesia.
• A great time to explore urban areas of Indonesia.

What is the weather like in Indonesia in January?

When you're thinking about visiting Indonesia in January, be ready for heavy rainfall and high humidity. January is right in the middle of the rainy season, so you can expect frequent tropical downpours, especially in places like Java, Sumatra, and Bali. Despite the rain, temperatures stay warm, however the humidity can make it feel a lot hotter.

All that rain can definitely mess with your travel plans, particularly if you're planning on outdoor activities like hiking or going to the beach. Roads can get muddy and slippery, and rural areas might even experience flooding, which can disrupt transportation. Cities like Jakarta and Surabaya are better equipped to handle the rain, although you might find traffic gets worse.

Because of the weather, January is the low season for tourism in Indonesia. The constant rain (between 200 to 300 mm) keeps many travelers away, so you’ll likely find fewer crowds at popular spots and possibly lower prices for accommodations and flights.

Overall, January might not be the ideal time to visit Indonesia if you’re hoping for clear skies and lots of outdoor fun. However, if you don't mind the rain and prefer fewer tourists, it could be a great time to explore the cultural and urban attractions without the usual crowds.

Read all about the best time to visit Indonesia.

Average daily temperatures in January

In January, the average daily temperatures in Indonesia typically range from 75°F to 86°F (24°C to 30°C), with extremely  high humidity and frequent rainfall. At night, the weather becomes a bi more comfortable with temperatures dropping to around 75°F (24°C).

The sea temperatures remain warm throughout the year, averaging around 84°F (29°C) in January, making it suitable for swimming if you happen to be able to catch a day without rain. Daylight hours are also consistent throughout the year (at 12 hours per day) because of the archipelago’s location on the equator.

The weather in Jakarta and Java

Jakarta , Indonesia's capital located on Java , has  a tropical monsoon climate. In January, temperatures average around 82°F (28°C) during the day, with high humidity. Expect frequent rainfall, often in the form of intense but short-lived afternoon thunderstorms. 

The weather in Bali and the Lesser Sunda Islands

Bali and the Lesser Sunda Islands, including Lombok and Flores, also experience tropical weather in January. Daytime temperatures hover between 79°F and 88°F (26°C and 31°C), with Bali slightly cooler due to its oceanic influences. Rainfall is moderate, typically occurring in brief showers or evening storms, leaving the days generally warm and humid.

The weather in Sumatra

Sumatra, Indonesia's largest island to the west, has a varied climate in January. Coastal areas like Medan and Palembang see temperatures ranging from 75°F to 86°F (24°C to 30°C), with occasional rain showers. Inland regions experience more consistent rainfall.

The weather in Papua and eastern Indonesia

In Papua and the eastern Indonesian islands, such as Sulawesi and the Moluccas, you can expect a range from 81°F to 90°F (27°C to 32°C), with warm, humid conditions. Rainfall is more frequent and can be heavy at times, especially in Papua's mountainous interior and the rainforests of Sulawesi. 

Is January a good time to visit Indonesia?

January can be a challenging month to visit Indonesia, largely due to the weather in Indonesia in January. This period falls within the wet season, characterized by frequent heavy rainfall and high humidity levels. The weather in Indonesia in January is predominantly rainy, with short bursts of sunshine occasionally breaking through. This can significantly impact travel plans, as some areas may experience flooding, making transportation and outdoor activities less predictable. 

Though swimming is still possible (and temperatures are warm), caution is advised due to potentially rough sea conditions this time of year. 

That said, Bali's temples, Jakarta's vibrant urban attractions, and Yogyakarta's cultural festivals offer enriching experiences regardless of the rain.  This time of year is great for exploring the archipelago’s urban centers.

While January might not offer the ideal beach weather, it presents a unique opportunity to experience Indonesia's culture and natural beauty in a different light.

What about the crowd & cost?

In January, Indonesia experiences the wet season, which affects tourist traffic and costs. Due to the heavy rainfall, tourist numbers tend to be lower, leading to reduced crowds at popular attractions like Bali, Jakarta, and Yogyakarta. This off-peak period translates to more affordable travel options, with discounts on flights, accommodation, and tours being common.

While January offers a quieter and more budget-friendly experience, the weather can be less predictable and may impact outdoor activities and beach plans. If you’re hoping for better weather, but want to avoid the crowds of peak-season, you may want to consider visiting in May or September instead. There will be more tourists than in January, but you’ll also have more sunny days. 

Festivals and events in Indonesia in January

When planning your trip to Indonesia, make sure to check for any of the archipelago's numerous festivals and events that may coincide with your visit. It's wise to book accommodations well in advance as they tend to fill up quickly. For more trip ideas and recommendations, explore our Indonesia trip ideas.

Mekotek/Mekotek

Mekotekan is a traditional ritual and festival held in Tenganan village, Bali, typically in January. It involves a unique form of mock battle where participants wield long bamboo poles called mekotek. This ancient ritual is believed to symbolize harmony, community strength, and protection against evil spirits. The festival attracts locals and tourists alike, who gather to witness the exhilarating displays of skill and bravery amidst the rhythmic beats of traditional music

Mawlid Festival

Mawlid, also known as the Prophet Muhammad's birthday, is celebrated with great fervor across Indonesia, particularly in Muslim-majority regions. It falls on the 12th day of Rabi' al-awwal, the third month in the Islamic calendar. 

The festival is marked by lively processions, spiritual gatherings, and special communal meals. In cities like Jakarta and Yogyakarta, streets are adorned with colorful lights, and mosques are beautifully decorated as communities come together to commemorate the birth of Prophet Muhammad.

Festival Manulude

Festival Manulude is a cultural extravaganza celebrated by the Minahasa people of North Sulawesi. Held annually in early January, this festival is deeply rooted in local traditions and customs. It features traditional music, dances, and rituals that showcase the rich cultural heritage of the Minahasa ethnic group. The highlight of the festival is the Manulude ritual, where locals offer thanks to their ancestors and pray for prosperity in the upcoming year.

Maudu Lompoa

Maudu Lompoa is a traditional ceremony held by the Bugis people in South Sulawesi. It is observed to honor the spirit of the sea, seeking protection and prosperity for fishermen and seafarers. 

During this festival, colorful processions take place along the coastal areas, accompanied by traditional music and dance performances. Offerings are made to the sea spirits, symbolizing reverence and gratitude for the bounties of the ocean.

Suwat Water Yard Festival

Suwat Water Yard Festival is a unique cultural event celebrated by the Toraja people in Tana Toraja, South Sulawesi. Taking place in January, this festival is dedicated to the appreciation of water as a source of life and fertility. 

Elaborate rituals are performed to bless water sources and irrigation systems, ensuring agricultural prosperity for the year ahead. The festival also includes traditional competitions, music performances, and feasting, offering a glimpse into the vibrant culture of the Toraja people.

Plan your trip with our Indonesia itineraries

Our Indonesia itineraries are crafted to help you experience the best of the country, stress-free. Think of them as a starting point — perfect for planning, but flexible enough to adjust to your own pace and interests. After all, travel is about freedom, but a little planning goes a long way.

Still deciding where to go this winter? Choose from the best destinations to travel to in January.