The Berkeley Earth Surface Temperatures (BEST) are a set of data products, originally a gridded reconstruction of land surface air temperature records spanning 1701-present, and now including an 1850-present merged land-ocean data set that combines the land analysis with an interpolated version of HadSST3. The land station data are available in an archive, and an experimental version provides daily data for 1880-present. Average (Tavg), minimum (Tmin), and maximum (Tmax) temepratures are provided. The Berkeley Earth project was intended to provide an alternative, independent assessment of global temperature change, separate from the analyses of the USA's NOAA and NASA, and the UK's CRU/Hadley Centre. In contrast to other data sets incorporating records from roughly 5000-7000 land stations, the Berkeley data set incorporates approximately 39,000 records. This is in part due to the use of additional data bases beyond GHCN, and in part to the methodology, which allows short, fragmented timeseries to be incorporated into the statistical model. The Berkeley datasets offer users a lot of flexibility in choosing a product for their needs. In addition to land records available at higher spatial and temporal resolutions than the main reconstruction, two different merged land-ocean datasets are offered. The first version infers air temperatures over sea-ice-covered regions, while the alternative version uses the nearest available SST observations. In the Arctic, the first version shows better agreement with independent estimates of air temperatures (like MERRA2) than does the alternative version.