Peruíbe's urban area is entirely along the Atlantic Ocean fronting its famous beach which is one of the longest in the state. The urban area covers a small part of the municipality, with population growing steadily. Most of the area north of downtown Peruíbe is forested with trees, and is hilly or mountainous as part of the Serra do Mar. An Indian Reservation named Terra Indígena Piaçagüera (Piaçagüera Indigenous Land) which is home to the Guaraní tribe named Nhandhevá covers an area of with a perimeter of 38 km.