Levels in tidal waters are measured from mean sea level, not from the river bed. They can, therefore, be negative, and do not give any indication of water depth. Tidal levels are not necessarily updated frequently, and may not reflect tidal movements throughout the day.

The normal level of the Llandudno Monitoring Station in average weather conditions is between -3.93m and 4.73m. It has been between these levels for at least 150 days in the past year.

The usual range of the Llandudno Monitoring Station in more extreme weather conditions is between -3.67m and 4.30m. It has been between these levels for 90% of the time since monitoring began.

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.

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.

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