The piezometer is designed to measure in-situ pore pressure relative to the hydrostatic pressure and temperature. For this dataset, in-situ excess pore pressure and temperature measurements were made using cable-deployed piezometers equipped with a sediment piercing lance of 60 mm diameter carrying differential pore pressure (pore pressure in excess of hydrostatic pressure or fluid excess pore pressure) and temperature sensors, ballasted with lead weights (up to 1000 kg). The piezometer pore pressure and temperature sensors have an accuracy of ±0.5 kPa and 0.05 °C, respectively.