Datasets
ECMWF produce and disseminate weather forecast data for the National Meteorological and Hydrological Services (NHMSs) of ECMWF Member and Co-operating States and their authorised users.
ECMWF also archives data and makes this available to authorised users. Some data is also made available under licence and some is publicly available.
See also
These are the medium, extended, and long range forecast data produced by the current IFS model and the AIFS model.
Archived data
These are the historical meteorological data available from the ECMWF archive.
Who you are and the agreement you have with ECMWF determines which data you can access. How you obtain the data depends on which data it is.