Traditional methods to process comfort data are constantly criticised due to their inability to provide an explanation thermal satisfaction achievement. Theories, however, seem to present a solution to this growing issue. Therefore, this study aims to review how the efforts made in exiting literature to benefit from theoretical frameworks to understand comfort data. The results showed the usage of theories in outdoor thermal comfort research is extensively limited. Furthermore, from the three categories identified for classifying these theories (personal, environmental and behavioural) personal based frameworks are widely used. The results have shed light on our understanding of thermal satisfaction in outdoor spaces. It is expected the findings contribute to developing thermal comfort standards that are specific to outdoor setting.