The development of sustainable infrastructure in marinas is crucial for environmental preservation and promoting sustainable development. Marinas, as significant centers of nautical tourism and ecologically sensitive areas, require careful planning and the application of sustainable practices. Climate change, including rising sea levels and extreme weather conditions, further complicates the situation, necessitating the adaptation of existing structures and the development of new, innovative solutions. This thesis investigates the integration of sustainable development in marinas, focusing on the use of environmentally friendly materials, energy efficiency, and renewable energy sources. The importance of local policies and regulations in promoting sustainable practices is emphasized as key to the successful implementation of sustainable solutions. The aim of the thesis is to analyze the impact of marinas on the environment, showcase sustainable approaches in marina design, and provide examples of best practices from Croatia and around the world. The study highlights the importance of thoughtful planning and the collaboration of all stakeholders to improve quality of life and preserve the environment.