San Antonio is a seaside locality in Uruguay, Rocha Department.
The town is located near Route 10, near the seaside resort city of La Paloma.
San Antonio is in the Southern Hemisphere's temperate zone and has four seasons. Temperatures average 21 ðC to 27 ðC (70 ðF to 80 ðF) in summer and 10 ðC and 16 ðC (50 ðF to 60 ðF) in winter.
In 2011 San Antonio had a population of 6 permanent inhabitants. During the summer season, the number of residents is increased significantly due to tourism.