Weserforts Brinkamahof, Military fort in Bremerhaven, Germany

Weserforts Brinkamahof were two Prussian forts on the Bremen side of the Outer Weser, opposite the fortress islands of Langlütjen. Fort Brinkamahof I was built between 1867 and 1872 at the northwest corner of what later became the Nordhafen turning basin. Fort Brinkamahof II, further downstream, was built between 1875 and 1881. Both were founded on thousands of tree trunks sunk into the mud and armed with 28-cm guns behind thick brick walls.

Construction began under Prussian control in the 19th century as part of efforts to secure Bremerhaven's harbor militarily. Both installations served as important defensive positions on Germany's North Sea coast until they were eventually closed.

The name Brinkamahof comes from the Brinkama farming family, who owned the marshland where the first fort was built. Soldiers from the Leher Artillerie-Kaserne marched up Hafenstraße and along the field path that became Batteriestraße in 1870 to reach the batteries. The site is now covered by Container-Terminal IIIa and IV.

The first fort is now completely covered by a harbor basin and no longer directly accessible. The second was demolished in 2000 during container terminal expansion, so visitors can only explore historical information at the site.

On 25 December 1914 a British reconnaissance biplane flew the length of the Weser estuary; the only machine gun on Brinkamahof II fired at it. Two days later Wilhelmshaven reported the aircraft drifting in the Outer Jade with a hit fuel tank and no trace of the pilot. The forts otherwise never faced an attacker from the sea.