Weather in Indonesia in December

Indonesia in December is notorious for its rain showers, which can be heavy but usually short-lived. Mornings often start bright and sunny, ideal for early adventures, but by midday, clouds gather, promising a refreshing drenching.

If you’re ready to experience the monsoon season, discover Indonesia with Rough Guides – here’s our guide to the weather in Indonesia in December.

Indonesia in December at a glance

• The weather in Indonesia in December is characterized by warm, wet, and humid weather, especially in coastal areas. 
• It marks the peak of the monsoon season in most parts of the country. 
• Average temperatures range from 75°F to 90°F (24°C to 32°C).
• Tourist crowds in December can vary depending on the specific destination. Most parts of Indonesia will experience fewer crowds and costs.
• Popular spots might see a surge, especially during the Christmas and New Year period. 

What is the weather like in Indonesia in December?

If you’re planning a trip to Indonesia in December, be ready for the wet season in full swing. This is one of the rainiest months of the year, thanks to the country’s tropical monsoon climate. While temperatures stay warm, often in the high 70s to 80s°F (mid-20s to 30°C), heavy rainfall is common across most islands.

Rainfall averages between 200 and 400 mm, which means lush landscapes and fewer crowds, but also potential travel delays. Flooding and slippery roads can affect transport, especially in rural or remote areas, so flexibility is key.

December isn’t typically considered the best time to visit Indonesia, particularly for beach days or outdoor trekking. That said, it’s a quieter and often more affordable time to explore, especially if you don’t mind the rain and want to experience popular spots without the peak-season rush. Pack solid rain gear and keep your plans adaptable.

Average daily temperatures in December

Daytime temperatures in December typically reach around 88°F (31°C). The weather this month is warm and humid, interspersed with frequent afternoon showers and thunderstorms. At night, temperatures cool down to about 77°F (25°C).

Compared to the dry season months (June to October), December sees a significant increase in rainfall and cloud cover, leading to more variable and potentially wet weather. Sea temperatures remain warm, averaging around 82°F (28°C).

Jakarta and Java

Jakarta and Java experience warm and rainy weather in December, with daytime temperatures averaging around 84°F (29°C). Humidity levels are high, and rainfall is frequent and heavy, often accompanied by thunderstorms. 

The wet conditions nourish Java's agricultural lands and rainforests, making December a month of lush greenery but also occasional disruptions to outdoor activities due to persistent rain.

Bali and the Lesser Sunda Islands

In December, Bali and the Lesser Sunda Islands have temperatures ranging from 77°F to 86°F (25°C to 30°C). The islands experience significant rainfall throughout the month, with frequent showers and occasional thunderstorms. Humidity levels remain high.

Sumatra

Sumatra in December sees temperatures between 73°F and 82°F (23°C and 28°C). Coastal areas like Medan and Padang experience heavy rainfall, contributing to the peak of the wet season.

Inland regions receive substantial precipitation, maintaining the island's rainforests and supporting its diverse wildlife. December is characterized by humid conditions and persistent rain showers that enrich Sumatra's natural environments.

Papua and eastern Indonesia

Papua and eastern Indonesia, including Sulawesi and the Moluccas, have temperatures ranging from 77°F to 88°F (25°C to 31°C) in December. The region experiences heavy rainfall as the wet season continues, with humidity levels remaining high.

Persistent showers are common, particularly in mountainous areas and rainforests, creating challenging yet fertile conditions that sustain the region's biodiversity and cultural richness.

Is December a good time to visit Indonesia?

December isn't the driest month, but that doesn’t mean you should skip Indonesia trips altogether. This is the peak of the rainy season, with regular downpours, usually in the afternoons or evenings. It’s warm across the country, but the mix of humidity and rain can make outdoor travel less predictable.

That said, the wet season paints the landscape a deep, tropical green. If you're looking for lush jungle scenery and fewer crowds, this might actually be a bonus. Popular spots like Bali, Lombok, and Flores, some of the best islands in Indonesia, are still well worth visiting. The sea stays warm, so swimming is definitely still on the table, especially along protected coastlines.

If you don’t mind the rain, you'll find a quieter, more relaxed vibe. This is a good time to dig into Indonesia’s cultural side, think markets, cooking classes, museums, and vibrant year-end festivals across the islands.

Why December is a good time to visit:

• Lush landscapes: Heavy rain brings out Indonesia’s tropical beauty: rice terraces, rainforests, and volcanoes are at their greenest.
• Warm sea temperatures: Despite the rain, the ocean stays inviting. Coastal areas still offer great swimming and beach downtime between showers.
• Rich cultural experiences: December is a festive month, with Christmas and New Year celebrations in Christian-majority areas like North Sulawesi and Flores.
• Lower prices: Outside of the Christmas peak, early December often brings cheaper flights and accommodation in popular destinations like Bali and Yogyakarta.
• Quieter beaches and temples: Fewer international visitors mean popular spots like Uluwatu, Borobudur, and Nusa Penida are more relaxed, just pack a rain jacket and keep your plans flexible.

What about the crowds and cost?

The weather in Indonesia in December brings heat, humidity, and frequent rain, but that doesn’t stop the crowds. With school breaks and end-of-year vacations, popular spots like Bali, Yogyakarta, and Jakarta see a surge in visitors. Expect higher hotel prices and busier attractions, especially from mid-December through the New Year.

While Indonesia remains affordable compared to many other destinations, prices do creep up during this festive season. If you're looking for a quieter trip or better deals, December’s early weeks are your best bet.

For drier weather and fewer crowds, consider traveling between April and October. But if you're flexible and don’t mind some rain, December can still offer a rich, cultural experience without breaking the bank.

Where to go in Indonesia in December

Rain dominates the forecast, but that doesn’t mean you should stay home. In fact, some of the best places to visit in Indonesia shine in December, especially if you’re looking for lush landscapes, rich cultural experiences, and fewer crowds at big-name spots. Here’s where to go.

Yogyakarta and Central Java

This region stays warm and alive with culture in December. You’ll get your fill of temples, markets, and street food, with fewer tourists than in the dry months.

Borobudur and Prambanan are atmospheric in the misty mornings, and rain usually comes later in the day. Plus, December brings end-of-year festivals that give the city an extra buzz.

Bali (early December)

If you hit Bali in the first half of December, you’ll beat the Christmas crowds and get a more laid-back vibe. Yes, it rains, but mornings can still be clear, perfect for markets, rice terrace walks, or checking out Ubud’s cafés and craft stores.

Southern beaches like Sanur stay relatively dry earlier in the month. If you're working on a Bali itinerary, this is a good time to include indoor-friendly stops like temples, galleries, and spa sessions, just in case a downpour hits.

Flores and Komodo

Eastern Indonesia tends to catch the wet season a bit later. Early December is a good time to explore Flores, visit local villages, hike to volcanic lakes like Kelimutu, or sail to Komodo National Park before the rain picks up. Visibility for diving can be hit or miss, but the landscapes are dramatic and green.

What to do in Indonesia in December

The weather in Indonesia in December is a mixed bag. It’s wet season in most parts of the country, with heavy but short tropical downpours, often in the late afternoon or evening. Java, Bali, and Lombok see regular rain, but you’ll still get plenty of dry hours for exploring.

If you’re wondering about things to do in December, don’t worry: Indonesia doesn’t slow down for the rain.

Celebrate Galungan in Bali

One of Bali’s most important religious festivals, Galungan, marks the victory of dharma (good) over adharma (evil). The island comes alive with colorful penjor (decorated bamboo poles) lining the streets, and temple ceremonies filled with offerings and traditional dress.

It’s a deeply spiritual time, but as a visitor, you’re welcome to observe (just dress respectfully and stay out of the way during prayers). Temples like Besakih or Pura Luhur Uluwatu offer especially atmospheric experiences during this time.

Chase dry days in Raja Ampat

While much of Indonesia gets soaked in December, Raja Ampat in West Papua stays relatively dry. This is one of the best diving spots in the world, and visibility is excellent this time of year.

Expect manta rays, reef sharks, and swirling clouds of fish. You’ll need to join a liveaboard or stay in a basic guesthouse on one of the islands, but if you’re serious about diving, it’s worth the effort.

Hike Mount Bromo (between storms)

East Java’s Mount Bromo is moody in December. You’ll need to watch the weather forecast closely, but the reward is dramatic views without the usual sunrise crowds. Early morning jeep tours still run, and the mist and cloud can make the smoking crater feel even more otherworldly. Pack layers and waterproofs, it’s cold and wet at the top.

Try street food in Yogyakarta

Rainy season means cooler evenings and plenty of time to explore Yogyakarta’s food scene. Try gudeg (young jackfruit stew), sate klathak (goat satay grilled over open coals), or bakpia (sweet bean-filled pastries).

Head to Jalan Malioboro after dark, when street vendors set up their tents and the smells of grilling meat and frying shallots fill the air.

Go surfing in South Sumatra

The Mentawai Islands are mostly off-limits this time of year, but South Sumatra’s Krui region can still get good swells in early December. It’s a low-key spot with uncrowded breaks, simple surf camps, and a proper wild-coast vibe. Expect muddy roads and slow travel, but if you’re happy to rough it, you’ll have waves almost to yourself.

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.