Swimming in the docks at Canary Wharf is generally not allowed for the public except during organized, supervised events. While the water quality in the London Docklands has improved significantly since the area's industrial past, it is still an active marine environment. There are specialized "Open Water Swimming" sessions, often managed by organizations like Love Open Water, which take place at Middle Dock or nearby London Royal Docks. During these sessions, the water is regularly tested for bacteria levels to ensure it is safe for human contact. However, "wild swimming" or jumping into the docks outside of these supervised windows is dangerous and strictly prohibited due to heavy boat traffic, deep water, submerged debris, and the risk of cold water shock. Furthermore, the docks have steep, vertical concrete walls with few exit points, making it extremely difficult to get out if you fall in accidentally. If you wish to swim in the shadow of the skyscrapers, you must book a session at a designated venue where safety staff and water quality monitors are present.