Barmouth Monitoring Station


Latest Tidal Level: -0.159m

Current level recorded at 4:00pm, Monday 25th October BST
(3:00pm, Monday 25th October GMT)

Change from previous measurement: -0.096m
(recorded at 3:45pm, Monday 25th October BST)

Important! The levels for this location are measured relative to sea level, not relative to the riverbed. The levels shown here do not, therefore, necessarily represent the actual depth of the water.

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.

The usual range of the Barmouth Monitoring Station is between -1.78m and 3.11m. 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 -1.90m and 3.23m. It has been between these levels for at least 150 days in the past year.

  • 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: E73239
  • Environment Agency Gauge ID: E73239-level-tidal_level-Mean-15_min-mAOD
  • Operational Area: Mawddach Estuary
  • Catchment Area: Meirionnydd Transitional & Coastal
  • UK Hydrometric Area: Dyfi Group
  • Level Datum: Above Ordnance Datum (AOD)

Nearby Monitoring Locations

There are no other monitored rivers nearby
Taming the Flood by Jeremy Purseglove

Nearby Flood Warning Locations

Barmouth Heol y Llan
Parts of the town from Heol Llywelyn to the Football Ground area

No current or recent warnings.

Barmouth Harbour and Hendre Mynach
Parts of the town including the north end of the promenade, Hendre Mynach caravan park, the harbour and Church Street

No current or recent warnings.

Fairbourne and Arthog
The community of Fairbourne and inland around the railway line as far as Morfa Mawddach station

No current or recent warnings.

Fairbourne Seafront
The western edge of the village behind the sea defence, including the golf course, Penrhyn Drive North and Penrhyn Drive South

No current or recent warnings.

Long term graphs will work better if you rotate your fondleslab into landscape mode.

Past Week

Long Term

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.

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