Unstructured socialising is a well-known risk factor for delinquency and crime involvement in adolescence. However, the extent to which adolescents are spatially connected through shared routine activities or activity fields, known as ecological networks, remains underexplored. This study seeks to address this gap in the literature using space-time budget data from the Malmö Individual and Neighbourhood Development Study. The aim is to investigate how adolescents are spatially connected in ecological networks, with a focus on unsupervised and unstructured socialising in public spaces. The study applies social network analysis techniques to spatially informed data to explore how adolescents are differentially clustered to neighbourhoods by their unstructured socialising. The findings indicate that while adolescents tend to share some neighbourhoods where unstructured socialising in public is more common, there are also clusters of time use that separate them. The study examines individual and neighbourhood characteristics that discern the ecological networks, which have implications for understanding the role of self-selection and time use in adolescent behaviour.