The best time to go to Buriti Bravo is during the dry season, which typically runs from June to December.
This period offers pleasant weather with less humidity and virtually no rain, making it ideal for exploring the town and surrounding natural beauty without interruption. You'll find it more comfortable for outdoor activities and general sightseeing.
For those planning to visit the nearby Chapada das Mesas National Park, the dry season is particularly suitable. The trails are clearer, and the waterfalls are still impressive, though not at their peak flow.