Bonito in August

April through September is peak season, and there's a reason everyone comes then. Rivers run clearest during dry season, visibility hits 40+ meters, and you won't sweat through your clothes walking between attractions. July gets busy with Brazilian school holidays — book tours weeks ahead. December through March brings rain that muddies the water and makes some trails impassable. But here's a secret: late March and early April offer perfect weather with smaller crowds. Water's still clear, temperatures hover around 25°C, and you'll actually get those Instagram shots without tourists photobombing.