Climate Anxiety refers to the feelings of distress and worry that many people experience due to the climate change crisis. This includes fears about the future, a sense of helplessness in the face of the situation, sadness about the damage caused to the environment, emotional and physical stress. Climate Anxiety can interfere with quality of life and, in some cases, lead to inaction or exhaustion from environmental concerns, so it is essential to identify the causes that can predict climate anxiety in order to implement appropriate interventions to address the aforementioned impact. The main objective of this study is to conduct a systematic review using the PRISMA methodology (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) to synthesize the existing evidence on predictors of anxiety about climate change. The results have revealed specific predictors that can increase climate anxiety, such as those related to age, gender, and exposure to information about climate change, among others.