In the wet dock parts, accessible by two large locks, more than 2 million cars are imported or exported every year with 2,3 million in 2014.
In 1381, the city of Bremen established de facto rule over the lower Weser stream, including Lehe, later therefore called Bremerlehe.
Early in 1653, Swedish Bremen-Verden's troops captured Bremerlehe by force.
To further complicate matters, a treaty between the two cities (as mentioned in Section 8 of Bremerhaven's municipal constitution) makes Bremerhaven responsible for the municipal administration of those parts owned directly by Bremen (known as stadtbremisch).
The container terminal is situated on the bank of the river Weser opening to the north-sea.
In 1924, Geestemünde and the neighbouring municipality of Lehe were united to become the new city of Wesermünde, and in 1939 Bremerhaven (apart from the overseas port) was removed from the jurisdiction of Bremen and made a part of Wesermünde, then a part of the Prussian Province of Hanover.
Bremerhaven was one of the important harbours of emigration in Europe.
The hottest temperature ever recorded was 35.8 °C (96.4 °F) on 9 August 1992, and the coldest was −18.6 °C (−1.5 °F) on 25 February 1956.
Due to its unique geographic situation, Bremerhaven suffers from a few transportational difficulties.
Today, Bremerhaven is therefore part of the city-state of Bremen, being to all intents and purposes a state comprising two cities, while also a city in its own right.
This is complicated somewhat by the fact that the city of Bremen has owned the "overseas port" within Bremerhaven since 1927.
Finally, in 1827, the city of Bremen under Burgomaster Johann Smidt bought the territories at the mouth of the Weser from the Kingdom of Hanover.