Objectives: The impact of climate change on mental health is well established, but few studies have examined the perspectives of young people, especially in low- and middle-income countries (LMICs). In this qualitative study, we explored how Brazilian children and adolescents experience climate change. This approach can help inform environmental education, communication, and self-care strategies for this age group. Methods: We conducted focus groups with 50 children and adolescents aged 5 to 18 years in three locations in Brazil. We analyzed the data using an interpretative phenomenological analysis framework. Results: We identified three profiles of involvement with climate change: unaware, disengaged, and engaged. Profiles were largely related to different socioeconomic contexts. We analyzed each profile across the dimensions of space, time, emotions, and actions. Adults were portrayed by participants as stubborn deniers, as neutral influences, or as role models of knowledge and engagement. Due to their age and developmental level, young children had distinctive perceptions of climate change. Conclusion: Spatial and temporal perceptions of climate change are a key element for experiencing and engaging with environmental concerns and vary according to age and socioeconomic differences. Effective communication to foster climate action at individual and collective levels requires narratives that reach different ages. Replication of these findings in other LMICs is warranted.