The analysis, dissemination and adaptation of good practices have been a reality for a long time, carried out by various sectors of the public and private sectors. In the case of Integrated Coastal Management (ICM), this scenario is incipient and lacks conceptual and methodological development. Good practices in Integrated Coastal Management are fundamental for the sustainability of these areas. Although Brazil has a legal and executive framework for GCI established over 30 years ago, there is no instrument to identify and share these good practices. In this context, this article presents and analyzes the development of the Integrated Coastal Management Best Practices Assessment Model, which was tested in three assessments of specific management processes. The first two evaluations were carried out with the managers of the ‘Costa Sul’ Program, an integrated management experience on a regional scale in the South of Brazil. The third evaluation of the model was carried out at the Federal Conservation Unit ‘Estação Ecológica do Taim’ and analyzed the management of this protected area from the perspective of Integrated Coastal Management. Priority was given to the elaboration and application of the model, where its results were presented and analyzed as the main locus of the research, leaving the analysis of the results of the management processes (specifically) in the background. The Good Practice Assessment Model is a pioneering initiative in terms of systematic assessment of good practices in ICM in Brazil and can contribute to the definition of integrated strategic bases for decision making and support for adaptive management. Keywords: Conceptual modeling; Integrated coastal management; Good practices; Management Instruments; Good practices; Evaluation processes.