This paper presents two datasets coming from a 67-year ongoing sea surface temperature time series from Malin Head, Ireland: a full-resolution measured dataset and a standardised data product. The latter of which has been stitched together from different measurement techniques and frequencies to make a more continuous and consistent time series. They have been used in a range of scientific papers to date and an annual warming trend of 0.015–0.022 °C has been found from the data.