This dataset contains the pressure and temperature data acquired below seafloor by piezometer MAR2-PZML-01 since July 2021 following its deployment during the MaRoLiS cruise and its connection to the EMSO-Ligure Nice cabled observatory. Pressure has been measured together with temperature at 7 different levels below seafloor. The P1 and P7 absolute pressure sensors have recorded the ambient pressure of the water column through the seawater-filled interior of the piezometer shaft. The P2 to P6 differential pressure sensors have recorded fluid pressure in the sediment pores relative to the water column pressure.