Climate change represents an increasing source of psychological stress for adolescents, contributing to the development of climate change anxiety (CCA) and climate change worry (CCW). CCA manifests as a cognitive-emotional (CEI) and functional (FI) response, characterized by rumination, helplessness, guilt, and impairment in daily activities, whereas CCW consists of persistent, difficult-to-control thoughts. Emotional regulation plays a key role in modulating adolescents' responses to CCA and CCW. A sample of 625 Italian adolescents (M=16.21±1.40; 51.68% female) completed the Climate Change Anxiety Scale, the Climate Change Worry Scale, and the Difficulties in Emotion Regulation Scale (DERS), which assesses dimensions of emotion regulation, including non-acceptance of emotional responses, difficulties in goal-directed behavior, impulse control, emotional awareness, access to regulatory strategies, and clarity. Results showed that CCA and CCW were positively correlated with total difficulties in emotion regulation (CCA-CEI: r=.15, p<.001; CCA-FI: r=.19, p<.001; CCW: r=.21, p<.001). Latent profile analysis identified three groups: (1) low levels of climate change anxiety and worry, (2) moderate levels, and (3) higher levels. Adolescents in the second and third groups showed significant difficulties in non-acceptance of emotions (F=16.12, p<.001). However, the second group exhibited greater difficulties in goal-directed behavior (F=5.73, p<.01), while the higher group showed impairments in impulse control (F=7.38, p<.001). Findings suggest that climate change anxiety and worry are associated with perceiving emotions as excessive or unwanted, limiting adaptive regulatory strategies. Adolescents with moderate anxiety and worry struggle to translate worries into action, perceiving climate change as a complex, uncertain challenge, whereas those with higher levels show difficulties in impulse control, likely related to helplessness, frustration, or inadequacy expressed through externalizing behaviors. These results highlight the importance of interventions aimed at fostering emotional awareness, acceptance of emotions, and access to regulatory strategies to support adolescents' emotional well-being facing climate change challenges.