River Levels
River Levels

Barmouth Monitoring Station

Latest Tidal Level


At 9:45am, Wednesday 10th April BST
(8:45am, Wednesday 10th April GMT)

Below normal for this location

Steady, no change from previous measurement at 9:30am, Wednesday 10th April BST

Warning: This data is stale! For some reason, we have not been able to obtain updated levels for over 24 hours. The current displayed level is probably incorrect and you should not rely on it.

This is a tidal level, measured from mean sea level rather than from the river bed. It can, therefore, be negative, and does not give any indication of water depth. Tidal levels are not necessarily updated frequently, and may not reflect tidal movements throughout the day.

Flood Warning Areas Covering Here

Mawddach and Wnion 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: Barmouth
  • Watercourse:
  • Nearest Town/Village: Barmouth
  • Local Authority: Gwynedd
  • Ceremonial County: Gwynedd
  • Coordinates: 52°43'9"N 4°2'42"W (52.71933,-4.04503)
  • OS Grid: SH 61969 15483 (261969,315483)
  • Mapcode (Local): GBR 8T.1NPT
  • Mapcode (Global): WH56L.TXZ5
  • Open Location Code: 9C4QPX93+PX
  • Maidenhead Locator System: IO72xr42
  • Environment Agency Location ID: E73224
  • Environment Agency Gauge ID: E73224-level-tidal_level-Mean-15_min-m
  • Operational Area: Mawddach Estuary
  • Catchment Area: Meirionnydd Transitional & Coastal
  • UK Hydrometric Area: Dyfi 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 usual range of the Barmouth Monitoring Station is between 0.62m and 5.52m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the Barmouth Monitoring Station over the past 12 months has been between 0.62m and 5.28m. It has been between these levels for at least 57 days in the past year.

Nearby Monitoring Locations

There are no other monitored rivers nearby

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