This dataset contains temperature data acquired between july 2023 and august 2024 with an array of 29 autonomous temperature probes installed in smoker orifices, cracks or patches of diffuse hydrothermal venting. We used 5 types of probes (HTW, HTWN, HTNKE, LTW, and LTGrad). Probes locations, acquisition parameters and clock drift values (UTC-timeprobe) are listed in the metadata file. Data are provided for each deployed instrument as one or two text files, uncorrected for clock drift: temperature data