The traditional Royal Waterman's Tudor Pull, organised by the Thames Traditional Rowing Association, will be rowed from Hampton Court to the Tower of London by the Jubilant and a number of cutters.
The flotilla will pass under the Millennium Bridge at approximately 3.25pm.
The event will serve as a rehearsal for the Queen's Diamond Jubilee River Pageant.
For the latest local news and events direct to your inbox every Monday, you need our weekly email newsletter SE1 Direct.