This is somewhat complicated. To the north you have the Barents Sea, on the coast of Finland. To the west, on the coast of Norway you have the Norwegian Sea.
Bodies of water that actually touch Sweden are: In the east you have to Bay of Bothnia, the Gulf of Bothinia and farther south the Baltic Sea. To the southwest of Sweden you have the Skagerrak inlet (sea) and the straits of Kattegat. The Skagerrak inlet (or sea) ties into the North Sea to the southwest.