Welcome to the
Permanent Service for Mean Sea Level (PSMSL)

Help us rescue tide gauge data from the 19th century!

PSMSL is the global data bank for long term sea level change information from tide gauges and bottom pressure recorders.

small icon for map-based data page small icon for table-based data page small icon for download all data page map of recently updated records Tide gauge records updated in the 30 days prior to
22 Nov 2021

About Us:

Learn about PSMSL, contact us, read news items and annual reports


Obtain and submit tide gauge and bottom pressure data


Browse the data set via Google Earth or obtain derived products, view regional commentaries and author archives

Training & Information:

A wide variety of FAQs, training and software documentation, information on non-oceanographic signals in tide gauge records (e.g., glacial isostatic adjustment, atmospheric pressure, etc.)


Links to other networks and programs, as well as international sea level contacts