The climate crisis affects children’s well-being and threatens future generations’ enjoyment of the right to the highest standard of health and security. This paper discusses a submission by the PSI Special Interest Group in Human Rights and Psychology to the UN Committee on the Rights of the Child. As health profession stakeholders we highlight how environmental degradation and children’s awareness of climate change present an important linkage to children’s mental health. We provide a psychological health account of climate anxiety and its effects on children, and a psychological perspective on the UN Convention on the Rights of the Child regarding health and participation. We detail how interventions mindful of children’s educational and participatory capacity offer the potential to moderate effects of climate anxiety. We discuss limitations of the term ‘climate anxiety’ for describing the experience of children from the Global South, preferring a narrative of physical and mental health parity.