Praia do Grumari, Natural beach in West Zone, Rio de Janeiro, Brazil.

Praia do Grumari is a beach in the West Zone of Rio de Janeiro, in the state of Rio de Janeiro, about 900 km southeast of Brasília. It lies on the Atlantic coast, and the surrounding area is mostly densely built up.

Grumari lies in the far west of Rio de Janeiro, beyond Recreio dos Bandeirantes, in an area that stayed sparsely settled for centuries. The surrounding Barra da Tijuca region was a belt of dunes and restinga scrub, frequented only by fishermen, until land was granted to Benedictine religious in 1667. In 1900 the lowlands of Jacarepaguá were sold to the Empresa Saneadora Territorial e Agrícola (ESTA), whose large landholdings and the mountains of Tijuca National Park kept access difficult and delayed occupation until the second half of the 20th century.

Grumari sits inside the Grumari Municipal Natural Park, created in 2001, a stretch of restinga and Atlantic Forest west of Recreio dos Bandeirantes. The beach takes its name from the Grumari estate that once occupied the land. Visitors find no buildings along the sand, only the park's vegetation and the rock outcrops that separate it from the neighbouring beaches.

Grumari lies west of Recreio dos Bandeirantes, at the end of Estrada do Grumari, which branches off Avenida Estado da Guanabara. The beach sits inside the Grumari municipal natural park, so the access road crosses protected restinga and no buildings line the sand. Arrive early in the day, as parking along the road fills quickly.

Nearby lie five other beaches with untouched nature: Inferno, Funda, Búzios, Meio, and Perigoso. Each maintains its wild character and sees little tourism.