River Thames conditions - advice for boaters

Page Last Updated: 19 February 2018 10:56   

Thames Map Thumbnail

Welcome to the Environment Agency's online River Thames conditions update service which displays our current advice to river users. We display warning boards at our locks to inform river users of conditions that may make navigating difficult and dangerous.

This page shows our current advice for each reach of the river between Cricklade and Teddington. We will update this information regularly when warning boards are being displayed at locks and as river conditions change. You can also sign up to our RSS service if you would like to receive updates.

Lechlade to Oxford Back to Map

ReachCurrent conditions
Upstream of St John's LockCaution stream decreasing
St John's Lock to Buscot LockCaution stream decreasing
Buscot Lock to Grafton LockCaution stream decreasing
Grafton Lock to Radcot LockCaution stream decreasing
Radcot Lock to Rushey LockCaution stream decreasing
Rushey Lock to Shifford LockCaution stream decreasing
Shifford Lock to Northmoor LockCaution stream decreasing
Northmoor Lock to Pinkhill LockCaution stream decreasing
Pinkhill Lock to Eynsham LockCaution stream decreasing
Eynsham Lock to King's LockCaution stream decreasing
King's Lock to Godstow LockCaution stream decreasing
Godstow Lock to Osney LockCaution stream decreasing
Osney Lock to Iffley LockNo Stream Warnings

Oxford to Henley Back to Map

ReachCurrent conditions
Iffley Lock to Sandford LockCaution stream increasing
Sandford Lock to Abingdon LockCaution stream increasing
Abingdon Lock to Culham LockCaution stream increasing
Culham Lock to Clifton LockCaution stream increasing
Clifton Lock to Day's LockNo Stream Warnings
Day's Lock to Benson LockNo Stream Warnings
Benson Lock to Cleeve LockNo Stream Warnings
Cleeve Lock to Goring LockNo Stream Warnings
Goring Lock to Whitchurch LockNo Stream Warnings
Whitchurch Lock to Mapledurham LockNo Stream Warnings
Mapledurham Lock to Caversham LockCaution stream increasing
Upstream of Blake's LockNo Stream Warnings
Caversham Lock to Sonning LockCaution stream increasing
Sonning Lock to Shiplake LockCaution stream increasing
Shiplake Lock to Marsh LockCaution stream increasing
Marsh Lock to Hambleden LockCaution stream increasing

Henley to Teddington Back to Map

ReachCurrent conditions
Hambleden Lock to Hurley LockCaution stream increasing
Hurley Lock to Temple LockCaution stream increasing
Temple Lock to Marlow LockCaution strong stream
Marlow Lock to Cookham LockCaution stream increasing
Cookham Lock to Boulters LockCaution stream increasing
Boulters Lock to Bray LockCaution stream increasing
Bray Lock to Boveney LockCaution stream increasing
Boveney Lock to Romney LockNo Stream Warnings
Romney Lock to Old Windsor LockNo Stream Warnings
Old Windsor Lock to Bell Weir LockNo Stream Warnings
Bell Weir Lock to Penton Hook LockNo Stream Warnings
Penton Hook Lock to Chertsey LockNo Stream Warnings
Chertsey Lock to Shepperton LockNo Stream Warnings
Shepperton Lock to Sunbury LockNo Stream Warnings
Sunbury Lock to Molesey LockNo Stream Warnings
Molesey Lock to Teddington LockNo Stream Warnings

Information for boaters

River conditions

River flows are sensitive to rainfall in winter and can spike quickly. For water levels go to https://flood-warning-information.service.gov.uk/river-and-sea-levels For flow rates go to http://www.gaugemap.co.uk

Navigation marks on shoals and obstructions.

When navigating upstream, leave red buoys to the left and green buoys to the right. When navigating downstream remember that the opposite rule applies. Avoid yellow and orange buoys as they mark hazards. For further advice, ask the local duty Lock Keeper. 

Annual registration 2018

If you are planning to keep your boat anywhere on the non-tidal Thames (including in marinas) this year then it's time to get your 2018 registration. Contact the boat registration team on 03708 506 506

Hambledon Lock, Weir Walkway

The walkway is undergoing repair between 05/03/2018 - 09/04/2018, the footpath will be open for public use however there will be a temporary diversion in place during this period. The works will not affect navigation.

Shifford Lock

The tail gates at Shifford lock are currently unable to open to their full extent and therefore navigation is restricted by approximately 6”. We are aware of the issue and are currently working to get it resolved. 

Romney Lock

There is a recurring fault on the public power system. The head pedestal hydraulic pump can run on causing it to over heat and the thermal cut out to activate. In the event this occurs when there is no keeper on duty, please call 0800 80 70 60 (24hrs).

Teddington Barge Lock

Head gates removed - launch lock and Barge lock still operational

Suspension of River Thames conditions email updates

Due to technical issues we are unable to notify subscribers of any changes on this web page. Remember to refresh the page each time you log in so that you see the most up to date information.


Caution strong stream
We advise users of all boats not to navigate because the strong flows make it difficult and dangerous.
Caution stream increasing
We advise users of all unpowered boats not to navigate and users of powered boats to find a safe mooring. This is because river flows are likely to strengthen and red boards could be displayed very soon and without warning.
Caution stream decreasing
We advise users of all unpowered boats not to navigate and users of powered boats to navigate with caution.


This information is also available on Floodline. Call 0345 988 1188 and select option 1 for river information for boaters.


Related Links

Thames Locks MapThames Locks Map Names OverlayClick here to view current conditions for:
Lechlade to OxfordOxford to HenleyHenley to Teddington