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How to cite

Flanders Marine Institute (VLIZ); Intergovernmental Oceanographic Commission (IOC) (2024): Sea level station monitoring facility. Accessed at on 2024-06-23 at VLIZ. DOI: 10.14284/482


The data presented under this service has not undergone any quality control and data is provided as received.
The main objective is to provide a fast status assessment of station availability and performance.

UNESCO/IOC, the Flanders Marine Institute (VLIZ) and data suppliers accept no liability for any errors and/or delays in data or for interpretations, transactions, or any other use carried out on the basis thereof.

UNESCO/IOC and the Flanders Marine Institute (VLIZ) do not guarantee that this web-site is available 24 hours/7 days a week.

Please note that the sampling frequency and data transmission frequency varies for the stations.

The Secretariat of UNESCO/IOC and the Flanders Marine Institute (VLIZ) do not guarantee the accuracy and reliability of advice, opinions, statements or other information or documentation provided to the Secretariat of UNESCO/IOC and/or to the Flanders Marine Institute (VLIZ) by Member States.

The publication of such advice, opinions, statements, information or documentation on the website and/or in UNESCO/IOC working documents does not imply the expression of any opinion whatsoever by the Secretariat of UNESCO/IOC or the Flanders Marine Institute (VLIZ) on the legal status of any country, territory, city or region, or their authorities, or the delimitation of their respective borders.

No information contained in the web-site and/or in working documents of UNESCO/IOC implies the expression of any opinion of the Secretariat of UNESCO/IOC and the Flanders Marine Institute (VLIZ) concerning the nature or the extent of the jurisdiction of coastal States in general or of any coastal State in particular.

Data policy

The data and products available through this web-site are made available in accordance with the IOC Oceanographic Data Exchange Policy as adopted by the 22nd session of IOC Assembly in Resolution 6. Data and products available on this web-site may not be used for any commercial purposes. Commercial users should contact the relevant data originators.

Long-term mean sea level (MSL) data

This GLOSS data center focusses on collecting and redistributing high frequency, relative sea level data in real-time.
Most stations provide values every minute and are updated each 5 minutes.
The GLOSS data centers at the Permanent Service for Mean Sea Level (PSMSL), the British Oceanographic Data Center (BODC) and the University of Hawaii Sea Level Center (UHSLC) perform the additional processing steps needed to calculate long-term mean sea level (MSL) data at hourly, daily, monthly and yearly averages.
Where available, the station detail page links to these mean sea level data series