Ross seals (Ommatophoca rossii) were instrumented with satellite-linked position-temperature tags. Primary data were collected during spring and summer expeditions carried out by scientists of the Mammal Research Institute (MRI, University of Pretoria), South Africa, the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), Germany, and the UiT - The Arctic University of Norway (UiT). The expeditions were located north of the Lazarev Sea (SA Agulhas II Southern oCean seAsonaL Experiment Spring cruise, 2019) and in the eastern Weddell Sea and King Håkon VII Sea off Queen Maud Land (RV Polarstern PS111 expedition, 2018; SA Agulhas II SANAE 55 expedition, 2016), and combined with published data taken in the aforementioned region during the Norwegian Antarctic Research Expedition (NARE 2000/2001). Processing of the primary data followed an established workflow (2018, 2016) or is described in the source data set (Blix and Nordøy, 2007). The seals were captured along the ships' tracks and instrumented with Argos-linked (CLS, Toulouse, France) position-temperature tags (SPOT300s 2019 (n = 2), 2016 (4); SPLASH10-309A 2018 (2), 2016 (2); SPLASH9 2016 (1); or SDR-T16 (2000 n = 10) Wildlife Computers, Redmond, WA, USA) to investigate their ranging and foraging behaviour in the context of oceanographic features.