Caversham Lock is a lock and main weir on the River Thames in England at Reading, Berkshire. Both structures connect to De Bohun Island (or colloquially Lock Island), a long island. The original lock was built by the Thames Navigation Commissioners in 1778. Additional sluices north of verdant View Island and multiple home Heron Island form the whole weir complex. A footbridge passes over all three islands to connect Lower Caversham to Reading via an alternative route than George Street and Reading Bridge.
The weir is upstream of the lock and in the mid-channel. Kings Meadow, Reading and buildings comprising homes and office blocks adjoin to the south of the lock itself. The island contains a typical lock-keeper's house, a crane depot, small boat yard and large boathouse owned by the Environment Agency for occasional use by that authority and police in river patrol and maintenance of boats.
A weir, mill, ferry and flash lock on the site were referenced in 1493 when granted to Notley Abbey. The pound lock opened in 1778, but the lock house, long promised, was not built until after 1819. In 1871 Reading Corporation planned to build a swingbridge over the lock cut upstream of the lock, but this was not implemented. The lock was rebuilt in 1875.
Access to and across the lock
The lock is about 400m east of Reading railway station and well connected to Kings Meadow, the largest park of central Reading.
Access to the north is to part of the Lower Caversham neighbourhood of the former village of Caversham (considered a Reading suburb administratively since it joined the Borough of Reading) and the route is open as a public footpath.
Reach above the lock
Soon after the lock is Reading Bridge followed by Fry's Island in the middle of the river. The built-up part of Reading stretches 500m (on the southern side) to Caversham Bridge, to the middle of which is attached a gangway leading to Pipers Island, with a restaurant which covers more than 75% of it.
The northern bank passes by Caversham, at the far farmland end of which St Mary's Island (seen on maps also as Upper and Lower Large) is close to the bank. West of this Mapledurham House comes into view as the river continues almost northwards towards Mapledurham Lock.
Reading Amateur Regatta is held annually in June between St Mary's Island and Caversham Bridge. Reading Festival is held on August Bank Holiday at Little John's Farm on Richfield Avenue near Caversham Bridge. During the festival a temporary structure, Reading Festival Bridge, links the site with parking and camping areas on the open meadows on the north bank. Here the Chiltern Hills can be seen in the background.
On the south bank, after the farmed meadows, is Tilehurst, where the river veers briefly north with the two islands of Appletree Eyot and Poplar Island in the centre of the river. The railway runs adjacent to the river for more than 600 metres on a high brick embankment to enable it to cut through the end of the escarpment on which most of Purley-on-Thames lies, further upstream.
The Thames Path follows the southern bank. A footpath follows the north bank between Reading and Caversham bridges.
There is an orphan section of the original towpath 1km downstream of Mapledurham Lock, inaccessible except by boat.
- Reading Rowing Club
- Reading Canoe Club
- Reading University Boat Club
|Wikimedia Commons has media related to Caversham Lock.|
|Next lock upstream||River Thames||Next lock downstream|
7.08 km (4.40 mi) 
4.23 km (2.63 mi)
|Next crossing upstream||River Thames||Next crossing downstream|
|Reading Bridge||Caversham Lock
|Sonning Bridge &|
Sonning Backwater Bridges
|Next island upstream||River Thames||Next island downstream|
|Fry's Island||De Bohun Island
- "A User's Guide to the River Thames" (PDF). PDF file. Environmental Agency. 2009. pp. 29–30. Retrieved 7 November 2012. Dimensions given in metres
- Fred. S. Thacker The Thames Highway: Volume II Locks and Weirs 1920 - republished 1968 David & Charles
- "Environment Agency Distances between locks on the River Thames". web page. Environmental Agency. 19 November 2012. Retrieved 20 November 2012. Distances given in km