Permeable pavements offer a solution to rainwater runoff treatment in urban areas, combining water management with re-use water purposes. On the other hand, the thermal behaviour observation of these systems have proven their contribution to palliate the urban heat island effect in the hottest season and to delay freezing during the coldest season. Deepening knowledge of the thermal response of the subbase of permeable pavements brings a background reference of using these structures as an energy resource in addition to the actual well-known applications as a rainwater reservoir. The aim of the present study is going into the thermal response observations of permeable pavements with special attention to the temperature distribution of the subbase, where rain water is stored for further uses involving the possibility to make a regulatory energy system. The results showed that subbase temperatures were different from the air temperature during the period of study and that the subbase was less affected by the ambient temperature than by the base of the permeable pavement.