An in-depth analysis of ageing can assist us in developing a deeper understanding of human temporality and its relevance for the good life. The experience of growing old makes clear that life is essentially a process in time with a particular temporal extension and structure that has important eudaemonic implications. Taking ageing as the starting point and frame of reference, I distinguish three ethically relevant levels of human temporality that become manifest in the process of ageing: the fundamental co-ordinates and parameters of human existence in time; the culturally variable models of the life course and life stages; and the unique individual trajectory through life and its narrative interpretation. These considerations underline the need for a more appropriate appreciation of the temporal dimension and structure of human existence in ethical discussions about the good life.