http://swrc.ontoware.org/ontology#Article Sea-ice motion and oceanographic data from the Beaufort Sea to the Chukchi Borderland in March–December 2020 en ocean beneath sea ice sea-ice motions Sea-ice reduction is one of the most visible indicators of the Arctic warming. While thereare many observations in the interior of the Arctic Ocean, oceanographic and sea-ice trajectory observations near the edge of sea-ice extent are rare. Here, we present oceanographic observations beneath sea ice obtained by an ice-tethered buoy and surrounding sea-ice motions obtained from 9 GPS buoys in the late ice-growth and sea-ice melt season along trajectories from the Beaufort Sea to the Chukchi Borderland in the Pacific sector of the Arctic Ocean. Polar Data Journal 5 60-68 2021-04 National Institute of Polar Research 2432-6771 https://doi.org/10.17592/001.2021012801|Original Data Oceanography/Sea ice studies