Realization of a national interests is a leading through the country political-economy actions based on a possessed national strategy. In Polish reality the role of leading strategy should be played by a long-term development plans. Now strategy - Long-time National Development Strategy Poland 2030 is one of them. It defines detailed in some, defined by country, areas of its actions and indicate the way of achieve them. In case of Polish sea interest, we should admit that they are not strictly related with sea economy and in a much higher degree are determinate in sectors strategy, energetic, environment and regional development. Achieving them is conditioned by ability to use it’s own potential and due to limited possibility in impact on sea areas, also in use already existing or arising supranational arrangements. Independent leaded by Poland actions should be concentrate in Baltic Sea. Important target should be correlation polish national interests with regional cooperation plans. It should be concentrate in sailing security issue, especially oil tankers and incorporate polish ports into system of transporting commodities form Asia to Europe and combating organized crimes. We should admit that, the most important target of polish presence on others water reservoirs is partial assumption of liability for polish transport of LNG gaze security by UE and NATO. That is why committed ourselves in UE action, including combating immigrations (BRODEX project) is necessary.