Our results show that starting in 2003 there is sufficient data to cover most of the South Atlantic except near the African coast, a climatically sensitive region because it includes the Benguela Niħo. This indicates that, on one hand, increased Argo deployments in that region are needed to maintain adequate sampling. On the other hand, increased supply of data from neighboring African countries is also desired. For years before 2003, the sampling is inadequate throughout the South Atlantic. Increased supply of historical temperature (and salinity) profiles is therefore desired from both South American and African neighboring countries in order to build a dataset as complete as possible for climatic applications.