C3S Seasonal Forecasts

The Copernicus Climate Change Service (C3S) seasonal forecast service is based on data from several state-of-the-art seasonal prediction systems. The centres currently providing forecasts to C3S are: ECMWF, The Met Office, Météo-France, the German Weather Service (Deutscher Wetterdienst, DWD), the Euro-Mediterranean Center on Climate Change (Centro Euro-Mediterraneo sui Cambiamenti Climatici, CMCC), the US National Weather Service's NCEP (National Centers for Environmental Prediction, NCEP), Japan Meteorological Agency (JMA) and Environment and Climate Change Canada (ECCC). The home page for the service and products can be found here

The C3S seasonal service currently offers graphical forecast products, available on the C3S web site, and public access to the real-time forecast and hindcast data, via the C3S Climate Data Store (CDS). Data are available from each of the components to the multi-system at a horizontal resolution of 1° x 1°, at daily/sub-daily time resolution and as monthly statistics (including monthly-mean anomalies). The period covered by the forecasts and hindcasts varies by forecast system and version. As the data is archived in MARS, it is also available there. 

Detailed documentation is available, and the available data is described in this table. The button on the right links to an example of the available data products in the CDS. The catalogue entries available will be listed under the ‘related data’ tab, these are  


Licence, citation, and acknowledgement

All the data published in the Climate Data Store as part of the C3S seasonal forecast multi-system may be used and redistributed without restrictions. Citation and acknowledgment requirements are provided on the CDS, alongside the Copernicus license and extra conditions which cover the data originating from non-European modelling centres (whose contributions to C3S are in-kind).  


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Copernicus Climate Change Service
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c3s seasonal forecasts subsets