The Heligoland Bight, also known as Helgoland Bight is an arm of the North Sea extending south and east of the red sandstone island of Heligoland. Heligoland is a small remote island of the German North Frisian group lying in the North Sea between the coast of Schleswig-Holstein and the estuaries of the Jade, Weser and Elbe.
The Heligoland Bight extends from the mouth of the River Elbe to the islands of Heligoland and lies between the East Frisian island of Wangerooge and the North Frisian peninsula of Eiderstedt. It is 5,249 feet long and 1,640 feet wide at its broadest point. In 1807 Heligoland was a Danish possession but it was seized by the English in 1814 and given to Germany in 1890.
Named after Heligoland, it was the location of World War I naval battles in 1914 and 1917. In 1939 it also had a World War II aerial battle named after it. In the Heligoland Basin (Helgoländer Becken), a basin lying directly southwest of Heligoland, the bight is up to 56 metres deep.

