Uruguay is the second-smallest country in South America, after Suriname. The landscape features mostly rolling plains and low hill ranges (cuchillas) with a fertile coastal lowland, most of it grassland, ideal for cattle and sheep raising. The highest point in the country is the Cerro Catedral at 514 m. To the southwest is the Rio de la Plata (River of Silver), the estuary of the Uruguay River, which forms the western border, and the Parana River, that does not run through Uruguay itself. The only other major river is the Rio Negro. Several lagoons are found along the Atlantic coast.

The climate in Uruguay is temperate, but fairly warm, as freezing temperatures are almost unknown. The predominantly flat landscape is also somewhat vulnerable to rapid changes from weather fronts, as well as to the pampero, a chilly and occasionally violent wind blowing north from the pampas plains in Argentina.