River Thames conditions - advice for boaters

Page Last Updated: 18 January 2017 10:37   

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 email and RSS service if you would like to receive updates.

Lechlade to Oxford Back to Map

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

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 strong stream
Clifton Lock to Day's LockCaution stream increasing
Day's Lock to Benson LockCaution stream increasing
Benson Lock to Cleeve LockCaution stream increasing
Cleeve Lock to Goring LockCaution stream increasing
Goring Lock to Whitchurch LockCaution strong stream
Whitchurch Lock to Mapledurham LockCaution strong stream
Mapledurham Lock to Caversham LockCaution stream increasing
Upstream of Blake's LockNo Stream Warnings
Caversham Lock to Sonning LockCaution strong stream
Sonning Lock to Shiplake LockCaution strong stream
Shiplake Lock to Marsh LockCaution strong stream
Marsh Lock to Hambleden LockCaution strong stream

Henley to Teddington Back to Map

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

Information for boaters

River Conditions

River flows are steady but remain strong. Red or Yellow increasing warning boards are being displayed at most lock sites, with a few areas showing Yellow Decreasing. We would advise all boaters to check this website for the latest information.

River closures began on 1 November 2016

The latest winter engineering programme and river closure information may be found by clicking on the link below:


Navigation marks on shoals and obstructions

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

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. Only an Environment Agency member of staff is able to re-set it. In the event this occurs out of hours, please call 0800 80 70 60 (24hrs).

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 or 0845 988 1188 and select option 1, followed by quick dial number 011131 to hear recorded information and advice.


Related Links

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