The objective of this work is to highlight the potentials of the Electrical Conductivity (EC) and Temperature (T) logs in seawater intrusion studies. EC logs (though discontinuous) have been carried out during a 40 year period along wells (OWS) specifically drilled for the control of seawater intrusion in the karst coastal aquifer of Salento (Southern Italy). The OWSs belong to the Regional Monitoring Network (RMN), which was established in the nineties for the control of groundwater quantitative/qualitative status. The net is presently intended for the objectives of the FWD 2000/60/EC. All the wells of the network are accessible to multi-parametric probes and samplers. The geo-statistical elaboration of T logs gives the distribution of aquifer temperature.