Praia do Guaiuba, Ocean beach in Guarujá, Brazil.

Praia do Guaiuba is a beach of fine, light sand about 790 m long in the Jardim Guaiuba neighbourhood of Guarujá, São Paulo. It lies between Praia do Tombo and Praia das Astúrias, in a residential area of houses for middle- and upper-class families.

The sources document Guaiuba only as a beach in the municipality of Guarujá, São Paulo state, in the Jardim Guaiuba neighbourhood beside Praia do Tombo and Praia das Astúrias. They record no founding date, no indigenous history and no transition from fishing village to resort; the surrounding area is described as an upscale residential district with houses for upper-middle-class and upper-class owners.

Guaiuba takes its name from the Tupi word for a yellow bird, a reference carried over from the indigenous language once spoken along this coast. The beach sits in Jardim Guaiuba, a neighbourhood of Guarujá known for houses belonging to upper-middle-class and wealthy families, so the seafront is lined with private residences rather than the tourist facilities found on busier stretches.

The beach has paid parking, shower facilities, and restaurants along the seafront, so most basic needs are covered on-site. The water is most comfortable for swimming during the warmer months, though the sheltered bay makes it usable for other activities year-round.

Although Guarujá is known for its popular beaches, Guaiuba draws more local residents than tourists, which gives it a noticeably different feel from the busier spots in town. Gear rental for water sports is available right on the beach, making it easy to try paddling or canoeing without bringing your own equipment.