River Levels
River Levels

River Thames at Marlow Lock

Current River Level


At 8:00pm, Thursday 20th June BST
(7:00pm, Thursday 20th June GMT)

Within the usual range for this location

Steady, no change from previous measurement at 7:00pm, Thursday 20th June BST

View downstream gauge levels

Flood Warning Areas Covering Here

Properties closest to the River Thames from All Saints Church, Bisham to Little Marlow

No current or recent warnings.

River Thames from Hurley to Cookham

No current or recent warnings.

Other Nearby Flood Warning Areas

River Thames at Bisham village and Marlow town

No current or recent warnings.

River Thames at Hurley and Harleyford

No current or recent warnings.

River Thames at Bourne End

No current or recent warnings.

Seven Day Level Chart

Long Term Level Chart

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 csv

Note: 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.

Location and Technical Data

  • Monitoring Station: Marlow Lock
  • Watercourse: Thames
  • Nearest Town/Village: Marlow
  • Local Authority: Wycombe
  • Ceremonial County: Buckinghamshire
  • Coordinates: 51°34'2"N 0°46'9"W (51.567382,-0.769176)
  • OS Grid: SU854861 (485406,186108)
  • Mapcode (Local): GBR D5W.QBF
  • Mapcode (Global): VHDWB.MV7T
  • Open Location Code: 9C3XH68J+X8
  • Maidenhead Locator System: IO91on76
  • Environment Agency Location ID: 2499TH
  • Environment Agency Gauge ID: 2499TH-level-stage-i-15_min-mASD
  • River Levels Online ID: 7396
  • Water Information System ID: 2499TH
  • Operational Area: South Chilterns
  • Catchment Area: Thames and South Chilterns
  • UK Hydrometric Area: Thames
  • Environment Agency Region: Thames
  • Datum Type: Above Stage Datum (ASD)
  • Stage Datum: 26.911m AOD

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 Marlow Lock is between 0.06m and 0.45m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the River Thames at Marlow Lock over the past 12 months has been between -0.01m and 0.74m. 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 Marlow Lock is 1.24m, reached on Monday 10th February 2014 at 2:30pm.

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.

Nearby Monitoring Locations

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