The best time to visit Bukit Lawang is during the dry season, which runs from March to September.During these months, you'll generally find less rainfall and more sunshine, making jungle treks and wildlife spotting much more enjoyable. The trails are less muddy, and river activities like tubing tend to be more pleasant. This period is ideal for anyone looking to maximise their time outdoors and experience the rainforest without frequent downpours.October to February is the rainy season. While it can still be a good time to visit, especially if you prefer fewer tourists, you should be prepared for daily rain showers. These can be heavy but often don't last all day. The rainforest is particularly lush during this time, and you might even have a better chance of seeing certain wildlife as they emerge after the rain.Ultimately, for the most comfortable and predictable trekking conditions, aim for the dry season.