For the lowest amount of rainfall and the best opportunity for animal sightings, July to October is the best time of the year to visit Pantanal during your adventure holidays in Brazil, as this is the dry season.
August until the middle of September is the peak of this season and sees the largest amount of tourists visiting the region. Therefore, if you want to strike a balance between visiting at the best time of year, but with fewer tourists, you may want to visit in either July or from the second half of September to October.