The best time to visit Borneo is during the dry season, which typically occurs between the months of April and October. During this time, the weather is generally more predictable and pleasant, with lower chances of rain and higher temperatures. However, it's important to note that Borneo has a tropical climate, so even during the dry season, there may still be occasional showers or short bursts of rainfall.

April to June is considered one of the best times to visit Borneo, as the weather is usually warm and sunny, making it ideal for outdoor activities such as hiking and wildlife spotting. It's also a great time to explore the various national parks in Borneo, such as Kinabalu National Park and Bako National Park, where you can witness the rich biodiversity of the island.

July to September is another popular period to visit Borneo, especially for diving enthusiasts. The waters around Borneo are known for their incredible marine life and stunning coral reefs. During these months, visibility is at its best, and divers have a higher chance of encountering species like whale sharks and sea turtles.

If you're interested in witnessing one of nature's most remarkable events, consider visiting Borneo between July and October. This is when the island experiences the annual migration of orangutans in search of food. You can observe these magnificent creatures in their natural habitat, swinging through the trees and building nests.

However, if you prefer a quieter and less crowded experience, it's advisable to avoid the peak tourist season, which typically falls between July and August. During this time, attractions and accommodations may be more crowded, and prices may be higher. For a more relaxed trip, consider visiting Borneo during the shoulder seasons, such as April or October, when there are fewer tourists but the weather is still pleasant.

It's worth mentioning that Borneo is a vast island, and weather conditions can vary from region to region. The eastern coast of Borneo, including destinations like Sandakan and Semporna, experiences a different weather pattern compared to the western coast, where Kuching and Kota Kinabalu are located. Therefore, it's important to research and plan your trip according to the specific region you intend to visit.

In conclusion, the best time to visit Borneo is during the dry season, which extends from April to October. This period offers favorable weather conditions for outdoor activities and wildlife exploration. Whether you're interested in trekking through lush rainforests, diving into vibrant coral reefs, or witnessing unique animal migrations, Borneo has something to offer year-round.