By bringing together observations available from various data centers a biogeochemical North Sea Climatology (NSBC) has been constructed providing a suite of biogeochemical parameters for the wider North Sea Region. During the preparation of the climatology, a standardization of the observations was applied to the individual data sets to harmonize data formats and physical units of the parameters. Duplicates were removed and a quality control procedure eliminated erroneous observations. The final data set consists of gridded fields of climatological mean values of biogeochemical parameters that complement the hydrographical climatology of temperature and salinity for the same region ([Bersch2013], http://icdc.zmaw.de/knsc_hydrographic.html?&L=1). The data product can be accessed https://icdc.cen.uni-hamburg.de/daten/ocean/nsbc/.