Nijhuis then travelled to Budapest, Hungary for the 2006 European Aquatics Championships. There she ended 6th in the 50 m breaststroke and 25th in the 100 m. With the 4 × 100 m medley team she ended 5th alongside Hinkelien Schreuder, Inge Dekker and Marleen Veldhuis. At the European Short Course Swimming Championships 2006 in Helsinki, Finland she finished 4th in the 50 m breaststroke and 11th in the 100 m breaststroke.