The SMOS Level 3 Sea Ice Thickness product, in NetCDf format, provides daily estimations of SMOS-retrieved sea ice thickness (and its uncertainty) around the Antarctic continent during the austral winter (from 15. April to 15. October), from year 2010 to 2020. The sea ice thickness is retrieved from the v620 SMOS L1C product, up to a depth of approximately 0.5-1 m, depending on the ice temperature and salinity. Daily maps, projected on polar stereographic grid of 12.5 km, are generated by the Alfred-Wegener-Institut (AWI).