Abstract: The increasing rates of climate change have repercussions in different sectors economics of a nations. For the tourism industry, climate change affects its destinations, since it changes the flora and fauna, relief, and vegetation of the area. This paper analyses the impact of climate change on tourism fluctuations in the Araucanía Region of Chile. This analysis was conducted through descriptive research, of longitudinal scope and a mixed approach with a predominantly quantitative approach. Variables caused by climate change that influence tourism fluctuations in the Araucanía region were analysed. The methodology contemplated the collection of statistical and bibliographic data. In addition, the development of a multiple linear regression model to explain the incidence of climate change on tourism, with "Overnight stays" as the study variable (y) that represents Tourism and "maximum temperatures and precipitation” as explanatory variables (x) that represent the climate change. To achieve this, data was obtained from January 2010 to December 2019. The results showed that climate change does affect in a positive way the tourism, since it has an impact on the arrival of tourists to the region, through an increase in the maximum temperature that entails an increase in overnight stays, consequently in tourism in the Araucanía Region.