This dataset contains temperature (°C), air saturation relative to nominal atmospheric pressure (%) and dissolved oxygen concentrations (µmol/l) acquired between November 2014 and February 2016 using an Aanderaa optode (product model 4330F, serial number 241). The sensor was positioned on the Secondary Jonction Box (SJB) which is an environmental science extension to the cabled neutrino telescope ANTARES (2460.8m depth). Data was acquired every minute.