Contulmo, which in Mapudungún means place of passage, is located in the province of Arauco, in the South of the VIII región del Biobío. The geography is characterized by a planificie that is located on the edge of the Lanalhue Lake and at the foot of the Cordillera de Nahuelbuta.
The climate is Mediterranean, hot in summer and cold in winter. The average annual temperature is around 13° C. The central zone of Chile is considered the warmest of the country. In summer temperatures surpass 30 ° C.