Aims and objectives. The study aimed at analysing school nurses counselling of overweight and obese children in settings with many immigrants, focusing on content concerning food and physical activity and how this was communicated. Background. For people with a predisposition for overweight, the weight control process requires cognitive skills. School nurses counselling of overweight children has the potential to support this process by enabling personal resources in the children and their families. However, there is uncertainty among nurses about how to conduct supportive counselling. Design. An explorative design was used when collecting and analysing data. Method. Twenty-two counselling sessions between eight school nurses and 20 overweight children were audio-recorded and analysed using qualitative content analysis. Most of the participating schools represented areas with low socioeconomic status and a high proportion of immigrants and refugees. Results. Less adequate skills in enabling resources in the children and their parents were observed. Concurrently, school nurses provided inadequate explanations about food and physical activity. Topics related to general nutrition models were frequently communicated as general advice instead of individually tailored counselling. Counselling families with other languages and food cultures than the traditional Swedish created additional difficulties. Conclusions. Improved nutritional knowledge for nurses may enhance their skills in enabling childrens and families resources. School nurses should be provided with opportunities to cooperate with other professions in counteracting overweight. Relevance to clinical practice. Our findings demonstrate a relationship between content skills and person-centeredness in the counselling. This highlights the importance of inter-professional collaboration to ensure a high quality of lifestyle counselling. School health authorities should give high priority to facilitating school nurses evidence-based continuing education.