This vector contour dataset represents the calculated temperature distribution (°C) at the base of the Sherwood Sandstone Group (SSG) in the main Permo-Triassic Cheshire, Wessex and Worcester basins and the intra-SSG temperature in the East Yorkshire-Lincolnshire Basin, considered for their hot sedimentary aquifer geothermal resource potential. The extent of the temperature maps corresponds to the extent of the modelled base SSG in each basin. The maps and are based on temperature data from the latest revision of the UK Geothermal Catalogue (1987) compiled during the 1977-1991 Geothermal Energy Programme. For all basins taken together, the temperature ranges between 5.3 °C to 103.7 °C, with the highest temperatures found at depth in the Wessex Basin. The dataset is used as a basis for the determination of the heat resource potential of the Triassic hot sedimentary aquifers in the UK (heat-in-place and heat recoverable). This dataset is derived from Rollin, K. E., G. A. Kirby, and W. J. Rowley. Atlas of geothermal resources in Europe: UK revision. British Geological Survey technical report WK/95/7, Regional Geophysics Group, 1995: https://webapps.bgs.ac.uk/data/publications/publication.html?id=21735106 and the European Geothermal Atlas (https://op.europa.eu/publication-detail/-/publication/9003d463-03ed-4b0e-87e8-61325a2d4456).