Samborombón Bay is a bay on the coast of Buenos Aires Province, Argentina. Located at the Río de la Plata's mouth on the Argentine Sea, it begins about 160 kilometres southeast of Buenos Aires and is about 135 kilometres wide.
Location: South America
River sources: Salado River, Samborombón River
Ocean/sea sources: Argentine Sea, South Atlantic Ocean
Basin countries: Argentina
Max. width: 135 km (84 mi)
Surface area: 2,500 km² (970 sq mi)
Settlements: General Lavalle, San Clemente del Tuyú