These mountains offer the best midwinter trail hiking on the peninsula. Expect rain July through October. November and December are warm (in the low 70ºF's), lush, and pretty dry.
According to National Geographic, the best chance of visiting the island is by obtaining a permit from the UAE or waiting for eco-tourism companies to start offering tours to the island.
Brazilian Atlantic Forest is very green, green and basically shades of green, but it's amazing and you will see many hilla covered in green, the best and easiest way to experience this scenery is doint the "Serra Do Mar Train Ride" that departa from Cuririba (capital city of the Paraná State) and ends at the Morretes Historic City! Make sure to eat the most typical Paranaense food, Barreado!