In this package we provide data from the monitoring platform on Greifensee, Switzerland. Data includes automated multiparameter (CTD) probe profiling (Ocean Seven 316Plus) and Meteo (Vaisala Oyj WXT520 & OTT HydroMet WS700-UMB) data, as well as manual samples taken for nutrient chemistry analysis (laboratory - Aua). CTD and Meteo data has been cleaned and a detailled description can be found in the ReadMe file. This package is associated with plankton community data (of the same time period), published here https://doi.org/10.25678/000C2G. Funded by SNF projects 310030L_182124 and CRSII5_202290.