River Levels
River Levels

River Thames at Sonning Lock (Downstream)

Current River Level


At 10:15am, Saturday 13th July BST
(9:15am, Saturday 13th July GMT)

Within the usual range for this location

Steady, no change from previous measurement at 10:00am, Saturday 13th July BST

View upstream gauge levels

Flood Warning Areas Covering Here

River Thames in the Playhatch, Sonning and Sonning Eye area

No current or recent warnings.

River Thames from Mapledurham to Sonning

No current or recent warnings.

Other Nearby Flood Warning Areas

Lower River Loddon at the River Thames confluence at Twyford

No current or recent warnings.

River Loddon at Twyford, Charvil and Wargrave

No current or recent warnings.

River Thames at Reading and Caversham

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: Sonning Lock
  • Watercourse: Thames
  • Nearest Town/Village: Sonning
  • Local Authority: Wokingham
  • Ceremonial County: Berkshire
  • Coordinates: 51°28'23"N 0°55'3"W (51.473138,-0.917727)
  • OS Grid: SU752754 (475265,175464)
  • Mapcode (Local): GBR QZ7.WC
  • Mapcode (Global): VHDWV.17PJ
  • Open Location Code: 9C3XF3FJ+7W
  • Maidenhead Locator System: IO91ml93
  • Environment Agency Location ID: 2301TH
  • Environment Agency Gauge ID: 2301TH-level-downstage-i-15_min-mASD
  • River Levels Online ID: 7132
  • Water Information System ID: 2301TH
  • 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: 31.607m 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 Sonning Lock (Downstream) is between 1.94m and 3.06m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the River Thames at Sonning Lock (Downstream) over the past 12 months has been between 1.99m and 3.70m. It has been between these levels for at least 150 days in the past year.

The highest level ever recorded at the River Thames at Sonning Lock (Downstream) is 3.96m, reached on Saturday 4th January 2003 at 11:15pm.

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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