At
11:45am, Friday 29th September BST
(10:45am, Friday 29th September GMT)
Within the usual range for this location
Rising, 0.030 from previous measurement at 11:30am, Friday 29th September BST
River Thames for Henley, Remenham, and Medmenham
No current or recent warnings.
River Thames for Henley, Remenham, Medmenham and its tributaries
No current or recent warnings.
River Thames for Shiplake, Lower Shiplake and Wargrave
No current or recent warnings.
River Thames for Shiplake, Lower Shiplake and Wargrave
No current or recent warnings.
Lower River Loddon at the River Thames confluence at Twyford
No current or recent warnings.
Darker blue shaded areas on long term data indicate maximum and minimum levels for the date (you may need to zoom in closer to see them).
Long term data may have gaps where the API data was not available.
Download long term data as csvNote: CSV data will include any outlying values that have been ignored by our graphing system as probably erroneous (eg, because they are ridiculously high compared to the values either side of them). It is your responsibility to filter these out if necessary.
Important! If you are planning to retrieve the csv data automatically, you must read and understand the limitations on the data and its availability.
Please note: Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.
The usual range of the River Thames at Marsh Lock (Downstream) is between 2.27m and 2.93m. It has been between these levels for 90% of the time since monitoring began.
The typical recent level of the River Thames at Marsh Lock (Downstream) over the past 12 months has been between 2.26m and 2.55m. It has been between these levels for at least 151 days in the past year.
The highest level ever recorded at the River Thames at Marsh Lock (Downstream) is 4.28m, reached on Sunday 9th February 2014 at 2:45am.
Note that this data may not take account of recent measurements, as we wait until a level has been verified by the Environment Agency before adding it to our records.
Other monitoring locations on the River Thames
Kings Lock
Godstow Lock Eynsham Lock Pinkhill Lock Farmoor Osney Lock Iffley Lock Northmoor Lock Sandford-on-Thames Shifford Lock Radcot Lock Rushey Lock Grafton Lock St Johns Lock Buscot Lock Ewen Abingdon Lock Hannington Bridge Somerford Keynes Culham Lock Clifton Lock Sutton Courtenay Cricklade Days Lock Benson Lock Marlow Lock Cookham Lock Hurley Lock Boulters Lock Cleeve Lock Maidenhead Goring Lock Bray Lock Shiplake Lock Romney Lock Whitchurch Lock Mapledurham Lock Windsor Park Sonning Lock Old Windsor Lock Reading Caversham Lock Bell Weir Teddington Lock Trowlock Island Kingston
Penton Hook Molesey Lock Sunbury Lock Thames Ditton Island Walton Chertsey Lock Shepperton LockMonitoring locations on nearby rivers