AbstractThis paper offers a theoretical discussion on why the nursing profession has had a delayed response to the issue of climate change. We suggest this delay may have been influenced by the early days of nursing's professionalization. Specifically, we examine nursing's professional mandate, the generally accepted metaparadigm, and the grand theorists’ conceptualizations of both the environment and the nurse–environment relationship. We conclude that these works may have encouraged nurses to conceptualize the environment, as well as their relationship with it, mainly in terms of the individual patient, and as such, nurses have not been encouraged to understand these concepts from a broader perspective. By not having the philosophical and theoretical foundations to understand the environment in relation to society, it is not surprising that nurses have had a delayed response to climate change and may not have viewed it as a professional concern. A planetary health perspective is suggested as a theoretical basis for nursing education, research and practice. Taking on a planetary health perspective could help nurses progress the profession and move healthcare systems towards supporting a climate‐resilient future.