​Groundwater & Geothermal Unit has produced a new suite of deep temperature maps for onshore Ireland. This short document is designed to present the maps and their metadata (describing how and why the maps were made) to the public. The maps will be available to view and download on Geological Survey Ireland’s online viewer in late 2021. The six maps were produced using temperature data provided by the Dublin Institute for Advanced Studies (J. Fullea. G.O.THERM.3D Providing a 3D Atlas of Temperature in Ireland's Subsurface, funded by the Irish Research Council and Geological Survey Ireland). The maps represent two dimensional slices through the crust at depths of 2 km, 2.5 km, 3 km, 3.5 km, 4 km and 5 km.