The SeaDataCloud Temperature and Salinity Historical Data Collection V2 for the North Atlantic Ocean includes open access in situ data on temperature and salinity of water column in the North Atlantic Ocean (from 10°N to 62°N for the east part and including the Labrador Sea for the west part) for period 1890 – 2019. The collection version 2 is a merge between the version 1 from which the delated profiles in the CDI portal were removed (list from Maris) and the collection of the new and updated data integrated after the version 1. The data of the version 1 were retrieved from the SeaDataNet infrastructure at the end of 2017 and the new and updated data were retrieved at the summer 2019 for the data integrated after the 30/10/2017. The dataset format is ODV binary collections. The quality control of the data has been performed with the help of ODV software. Data Quality Flags have been revised and set up using recommended QC procedures defined during SeaDataNet2 in conjunction with the visual expert check.