In a community survey the Southern Ocean modelling community was addressed for gathering a profound basis of the current state of models, future developments and observational data needs. Based on almost 100 responses, the survey outcome is presented using conditional analysis and highlighting key science topics, major future model evolutions and, specifically, potential improvements for collaboration between the communities of modellers and observationalists. Conclusions are drawn that are anticipated to be informative of and helpful for the ongoing planning of the Antarctic InSync observational program and the next International Polar Year.