Bottom line: Indonesia’s BMKG predicts the heaviest rainfall from December 28 to January 10, a 10–14 day stretch with 300–500mm of rain. The typical pattern is clear mornings, intensifying rain from midday to afternoon, and mostly stable evenings. This won’t ruin most itineraries, but watch for flight delays and possible cancellations of island-hopping activities due to rough seas. Pro tip: save outdoor plans for the morning and have indoor backups for the afternoon.
For readers planning a trip to Bali at the end of the year or early next year, have you seen the latest announcement from Indonesia’s BMKG posted in our Facebook group? It’s a heavy rainfall advisory covering late December to early January—the most critical period of the annual rainy season.
As a travel writer who’s lived long-term in Indonesia and frequently visits Bali, I’ve put together a guide to help you plan your trip for January–February 2027 with more confidence.
🌧 Rainfall to Reach 300–500mm: Peak Rainy Season from Late December to Early January
BMKG’s forecast indicates that Indonesia will see an intensification of rainfall in late December, with the most pronounced rain and more frequent showers and thunderstorms expected between December 28 and January 10.
Roughly speaking, the weather during this period typically follows this pattern:
- Occasional clear spells in the morning
- Rain intensifies from midday to afternoon
- Evening to night may bring more rain depending on cloud cover
This isn’t the worst downpour of the year, but it is the 10–14 day stretch during the rainy season that demands the most caution.
⚠️ What Travelers Should Know: Not Dangerous, But Be Prepared
Bali is still very much enjoyable during the rainy season, but this period does bring some notable impacts, including:
- Flight delays: Afternoon thunderstorms often cause temporary groundings or delays.
- Rough seas: Big waves and poor visibility can affect snorkeling, speedboat trips, and island-hopping.
- Flooding in low-lying areas: Particularly in parts of Denpasar or coastal roads.
- Changing conditions in mountainous areas: Waterfall trails and mountain paths may occasionally have falling rocks or mud.
For travelers, these aren’t reasons to cancel your trip—just reasons to adjust your daily rhythm and expectations.
🌤 Don’t Get It Wrong: The Rainy Season Still Has Sunny Days and Plenty of Fun
I know many people get nervous when they hear ‘heavy rainfall’ and ‘300–500mm,’ thinking the whole trip will be a washout.
But Bali’s rainy season isn’t non-stop downpours—it’s frequent short bursts of rain and afternoon thunderstorms.
What it actually feels like:
- Mornings are often sunny, with some areas enjoying brilliant blue skies
- Clouds roll in after midday, with rain coming and going in intensity
- Evenings usually stabilize, perfect for dining, shopping, and photos
So the real strategy for travelers is: save the good weather for the morning.
🎒 Travel Tips for Bali: January–February 2027
Here are some tips based on years of experience and this year’s BMKG warnings:
- Avoid island-hopping trips from New Year’s to January 10
This includes Nusa Lembongan, Nusa Penida, and the Gili T islands, as boats may be canceled or you might end up seasick beyond belief.
- Schedule beach and outdoor activities in the morning
If you want to photograph rice terraces, waterfalls, Tanah Lot, or the Monkey Forest, mornings offer a much higher success rate.
- Pack waterproof gear
Lightweight raincoats, waterproof bags, flip-flops, and quick-dry clothing are lifesavers during the rainy season.
- Keep your itinerary flexible
Don’t pack every day full; that way, you won’t panic if the rain suddenly intensifies.
After mid-January and into February, the rain becomes more ‘predictable’
It still rains, but the rhythm feels more like a typical rainy season, not as intense as around New Year’s.
🌈 Bali in the rainy season is actually quite charming
Honestly, I have a love-hate, yet dependent, relationship with Bali during this time. After a downpour, the whole island feels washed clean: the air is crisp, the greenery is saturated, the waterfalls are spectacular, and the rice paddies in Ubud look like an oil painting. Plus, with fewer tourists than peak season and cheaper accommodation, this period is even more comfortable than the high season for those who enjoy slow travel, nature photography, good food, and spa treatments.
The rainy season is never a hindrance to your trip—it’s just a reminder to change your pace.
Want to know what to do when it rains? Or need a quick Plan B when a sudden downpour disrupts your itinerary? Check out our 60 Rainy Day Activities in Bali!
