More than 1.000 leisure boat harbours and a unique set of varied sub-destinations (e.g. Swedish archipelago, South Coast Baltic, East Baltic Coast) make the Baltic Sea an attractive boating region for sailors and motor boaters from both littoral and far away countries. Despite high class infrastructure and an attractive destination profile of diverse nature & culture experiences, however, it still lags behind international competitors (in particular: Mediterranean Sea) in terms of visibility and tapping economic potentials of leisure boating. BaltSusBoating 2030 initiates a strategic cooperation at BSR level for developing the Baltic Sea into a single & sustainable boating destination, and to jointly promoting it at international markets. Supported by CBSS, the main boating tourism networks & associations team up to define goals & steps for a collaborative destination development and joint marketing until 2030. This includes: (1) to establish a pan-Baltic cooperation platform, (2) the elaboration of a Sustainability Roadmap, (3) knowledge exchange & peer learning activities, (4) dialogue with policy makers, (5) the iterative development of a joint marketing approach for the Baltic Sea as a single & sustainable boating destination. Thus, the project lays foundations for making leisure boating in the Baltic Sea more sustainable and more competitive at international markets until 2030, by utilising new opportunities in the post-pandemic boating tourism.