River Levels
River Levels

Dwyfor at Garndolbenmaen

Current River Level


At 4:00pm, Monday 15th July BST
(3:00pm, Monday 15th July GMT)

Within the usual range for this location

Steady, no change from previous measurement at 3:30pm, Monday 15th July BST

Flood Warning Areas Covering Here

North Gwynedd Catchment

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: Garndolbenmaen
  • Watercourse: Dwyfor
  • Nearest Town/Village: Dolbenmaen
  • Local Authority: Gwynedd
  • Ceremonial County: Gwynedd
  • Coordinates: 52°57'44"N 4°14'12"W (52.962445,-4.2367037)
  • OS Grid: SH4986742906 (,)
  • Mapcode (Local): GBR 5K.KH8V
  • Mapcode (Global): WH446.WSPS
  • Open Location Code: 9C4QXQ67+X8
  • Maidenhead Locator System: IO72vx10
  • Natural Resources Wales Location ID: 4171
  • Natural Resources Wales Gauge ID: 4171
  • River Levels Online ID: 4171
  • Operational Area: Dwyfor
  • Catchment Area: Llyn and Eryri
  • UK Hydrometric Area: Glaslyn Group

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 Dwyfor at Garndolbenmaen is between 0.08m and 0.88m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the Dwyfor at Garndolbenmaen over the past 12 months has been between 0.01m and 1.99m. It has been between these levels for at least 151 days in the past year.

The highest level ever recorded at the Dwyfor at Garndolbenmaen is 1.56m, reached on Wednesday 22nd November 2017 at 10:15pm.

Note that this data may not take account of recent measurements, as we wait until a level has been verified by Natural Resources Wales before adding it to our records.

Nearby Monitoring Locations

There are no other monitoring stations on the Dwyfor

Monitoring locations on nearby rivers

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