River Levels
River Levels

Llyn Brianne Reservoir Monitoring Station

Current Reservoir Level

-1.110m

At 12:00pm, Wednesday 1st February GMT

Within the usual range for this location

Falling, -0.010 from previous measurement at 10:15am, Wednesday 1st February GMT

Flood Warning Areas Covering Here

Upper Towy

No current or recent warnings.

Other Nearby Flood Warning Areas

Rivers Leri and Clarach

No current or recent warnings.

Rivers in Llanelli

No current or recent warnings.

Rivers Nant-Y-Fendrod and Nant Bran

No current or recent warnings.

Lower Tawe

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: Llyn Brianne Reservoir
  • Watercourse: Tywi
  • Nearest Town/Village: Llanddewi Brefi
  • Local Authority: Ceredigion
  • Ceremonial County: Dyfed
  • Coordinates: 52°7'18"N 3°45'51"W (52.121775,-3.7644282)
  • OS Grid: SN7929848520 (,)
  • Mapcode (Local): GBR Y5.8JWX
  • Mapcode (Global): VH5DB.PXRT
  • Open Location Code: 9C4R46CP+P6
  • Maidenhead Locator System: IO82cc89
  • Natural Resources Wales Location ID: 4204
  • Natural Resources Wales Gauge ID: 4204
  • Operational Area: Tywi
  • Catchment Area: Carmarthen Bay and the Gower
  • UK Hydrometric Area: Towy Group
  • Datum Type: Above Stage Datum (ASD)

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 typical recent level of the Llyn Brianne Reservoir Monitoring Station over the past 12 months has been between -1.48m and 0.00m. It has been between these levels for at least 165 days in the past year.

The highest level ever recorded at the Llyn Brianne Reservoir Monitoring Station is 1.14m, reached on Thursday 15th October 1987 at 12:00am.

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

Monitoring locations on nearby rivers

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