An e-Government portal is responsible to provide news, information and services to citizens, merchants and tourists in a reliable way. Previously, we proposed a Web Monitoring System (WMS) that monitors the performance of a web portal in real-time [1]. Web portal structure is complex to analyze though it is important to discover useful patterns, evaluate performance, locate anomalies and identify problems. Visualization is helpful in performance evaluation and interpretation of web usage mining results. In this paper we proposed a tool comprised of visualization and fuzzy association rule mining, called Web Visualization System (WEBVS), as an extension to the WMS for monitoring and analyzing performances of e-Government websites.