The Meteorological Archival and Retrieval System (MARS) is the main repository of meteorological data at ECMWF. It contains petabytes of operational and research data, as well as data from Special Projects. Read the MARS documentation for more information

Users can browse the Archive catalogue (describing archive data that ECMWF can distribute) or the complete MARS catalogue (authorization required) from our dedicated server

Please see also how to retrieve data with our WebAPI