The WMO Information System (WIS) provides information collection and sharing, and discovery access retrieval (DAR) services to support all WMO and related international programs, which requires WIS having high availability and efficiency as operational indices. In order to keep availability and efficiency, it is necessary to implement WIS monitoring. The WIS monitoring portal implements the monitoring of WIS centers based on the agreed monitoring JSON specification, including service status, metrics and statistics, which fully covers the requirements of WIS monitoring. The implementation of the WIS monitoring portal site is based on the open source enterprise application framework and nonrelational database management system. It demonstrates in real time WIS monitoring information to public on Internet, reflecting WIS services problems, which provides an efficient mean for improving the quality and competence of WIS services.