Which seas form Germany’s northern coastline?

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Germany’s northern coastline is formed by two seas: the North Sea to the northwest and the Baltic Sea to the northeast.12

The North Sea coast is characterized by tidal flats, estuaries, and chains of islands, such as the East Frisian Islands and the North Frisian Islands. In contrast, the Baltic Sea coast features a more varied landscape of fjords, bays, peninsulas, and sandy beach bars, with islands including Rügen.13