Recent times have seen an emergence of cold-water sea swimming as a popular pasttime for increased numbers of people in coastal regions. Within this paper, we seek to outline the philosophical relationship between water and society, right back to Thales. From this we continue through anthropological sources to highlight the relationship between culture and the sea throughout much of human history. Sociology offers only piecemeal theoretical bases for this relationship. Here, the concept of liminality is deployed as a mechanism through which we can interpret human-water relations. On from this, the concept of the ‘oceanic feeling’, coined by French intellectual Romain Rolland, is discussed to situate how the experience of swimming might offer one among many means through which we can return to the world as it is given to us, in a Nietzschean sense, and in doing so return at once to an experience of the eternal borne from presence.