The Saga Farmann longship is being rowed up the Thames on Tuesday evening 26 August.
Tower Bridge is due to open at 10pm but there will be chance to see the Viking vessel depart in daylight at 4pm the following day when she will berth for a week at nearby St Katharine Dock.
The Saga Farmann is Norwegian and based on a reconstruction from the year 998. On its long and complicated journey to London it has travelled across land, as the original will have done, as well as on water.
The overnight mooring in the Pool of London is expected to be between Cannon Street and London Bridges.
An early London Bridge was pulled down on 8 September 1014 by Norwegian King Olaf II who had ropes from the crossing attached to his boats before ordering crews to row hard.
This was part of a friendly plan to save Southwark from the Danes.
Olaf was later declared a saint and St Olave’s church subsequently stood next to London Bridge until being demolished in 1927. Today the figure of St Olaf can be seen on the site – where the Thames Path turns inland to Tooley Street.