River Levels
River Levels

Thirlmere Reservoir Monitoring Station

Current Reservoir Level

14.170m

At 10:45am, Thursday 26th December GMT

Within the usual range for this location

Steady, no change from previous measurement at 10:30am, Thursday 26th December GMT

Flood Warning Areas Covering Here

Rivers Greta, St Johns Beck and Bassenthwaite Lake

No current or recent warnings.

Other Nearby Flood Warning Areas

Upper River Derwent, Stonethwaite Beck and Derwent Water

Recent warnings or alerts no longer in force

River Greta at Keswick, The Forge area

No current or recent warnings.

Greta Street and Penrith Road at Keswick

No current or recent warnings.

River Greta at Keswick, Main Street, Bank Street and Greta Side

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: Thirlmere Reservoir
  • Watercourse: Thirlmere Reservoir
  • Nearest Town/Village: St John's Castlerigg and Wythburn
  • Local Authority: Allerdale
  • Ceremonial County: Cumbria
  • Coordinates: 54°33'41"N 3°4'7"W (54.561659,-3.068796)
  • OS Grid: NY3098419019 (330984,519019)
  • Mapcode (Local): GBR 7H0P.DK
  • Mapcode (Global): WH70F.TLVT
  • Open Location Code: 9C6RHW6J+MF
  • Maidenhead Locator System: IO84ln14
  • Environment Agency Location ID: 750604
  • Environment Agency Gauge ID: 750604-level-stage-i-15_min-m
  • River Levels Online ID: 5210
  • Water Information System ID: 750604
  • Operational Area: Derwent
  • Catchment Area: Derwent North West
  • UK Hydrometric Area: Derwent Group (Cumbria)
  • Environment Agency Region: North West
  • Datum Type: Above Stage Datum (ASD)
  • Stage Datum: 162.52m 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 Thirlmere Reservoir Monitoring Station is between 10.09m and 16.68m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the Thirlmere Reservoir Monitoring Station over the past 12 months has been between 12.23m and 16.95m. It has been between these levels for at least 150 days in the past year.

The highest level ever recorded at the Thirlmere Reservoir Monitoring Station is 18.04m, reached on Saturday 5th December 2015 at 6:00pm.

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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