Wilhelmshaven, situated on the west side of Jade Bay, a 5km/3mi wide inlet on the North Sea coast, was until 1945 primarily a naval port. It is now an important oil terminal and has a variety of industry (chemicals, metalworking, engineering, textiles). It has a Marine Biological Research Station belonging to the Senckenberg Society and an Ornithological Institute.
On the north side of Wilhelmshaven's Rathausplatz is City-Haus, with the interesting Coast Museum (natural and cultural history of the North Sea coast, shipping; ship models).
Wilhelmshaven's extensive port installations lie to the south of the town. On Bontekai are a number of museum ships. On a disused section of railroad track can be seen an old steam engine.
Beyond this, on the South Beach, is a sea-water aquarium.