Discover a remarkable piece of D-Day history hiding in plain sight with a boat trip to the Mulberry Harbour Southend. This giant concrete structure, visible off the coast near Thorpe Bay, is a powerful and tangible link to the epic events of the Second World War. While many people see it from the shore, our dedicated boat tour offers the closest, most memorable, and informative view possible.
This trip is a must-do for history enthusiasts, curious explorers, and anyone looking to understand the incredible stories hidden within our local landscape.

What is the Southend Mulberry Harbour?
The Mulberry Harbours were one of the greatest engineering feats of World War Two. They were temporary, portable harbours designed to be built off the coast of Normandy immediately following the D-Day landings in June 1944. Consequently, they allowed the Allies to rapidly unload the enormous quantities of troops, vehicles, and supplies needed to win the war in Europe.
The structure you see today is a ‘Phoenix Caisson’ – a huge concrete breakwater unit that formed the outer wall of the harbour. This particular unit became damaged and was grounded here while being towed down the Thames Estuary towards France, where it has remained ever since.

A Key Part of Southend’s WW2 History
This surviving caisson is a vital part of Southend’s WW2 history. The Thames Estuary was a hive of activity during the war, acting as a crucial artery for logistics and defence. This relic serves as a permanent, silent monument to the immense ingenuity and industrial effort that originated from our very own coastline. It stands as a tribute to the generation that contributed to the success of the Normandy invasion.

The Best Way to See the Harbour
While the Mulberry Harbour Southend can be seen from the shore, its true scale and fascinating details are only revealed from the water. Our boat trips allow us to get safely up close to the structure, offering a complete 360-degree perspective that you simply cannot get from land. Therefore, itโs a fantastic opportunity for photographers and anyone interested in history to appreciate this monument properly.
Ready to get a closer look at history? Book your place on our next tour today!