Caversham Lock is a lock and main weir on the River Thames in England at Reading, Berkshire. Both the lock and main weir are connected to De Bohun Island (colloquially known as Lock Island). The Thames Navigation Commissioners built the original lock in 1778. Additional sluices north of View Island and Heron Island form the whole weir complex. A footbridge passes over all three islands to connect Lower Caversham to Reading via a route other than George Street and Reading Bridge. The head of water provided by the weir is used by Reading Hydro to generate up to 46 kW of electricity.