The aim of this paper is to discuss the process of creating atmospheres in the context of pervasive computing-mediated spatial experiences. Firstly the concept of an atmosphere is defined and the process of creating atmospheres is discussed. Secondly, the paper considers the embedment of pervasive and ubiquitous computation and the Internet of Things technological infrastructure onto physical environments as spatial interfaces. Then post-phenomenology is put forward as an appropriate theoretical framework for approaching the experiential impact of technologically mediated spatial experiences. Finally, the paper uses an interactive audio installation artwork as an example to further the discussion presented in the paper.