Havana City is located along Cuban North-Western shoreline. Many old building structures are located in the waterfront zone to the West of Havana Bay. This zone is defined as “Traditional”. An atmospheric corrosion study of carbon steel CT-3 in the Havana Traditional waterfront zone was carried out. The main aim is to classify the atmospheric corrosivity respecting carbon steel, the main metallic material used in the construction industry. Monthly and cumulative behavior of steel corrosion rate was analyzed, as well as the factors influencing on the kinetics. The influence of climatic factors on chloride and sulfur compounds deposition was also analyzed. Four exposure sites were placed at the same distance from the sea. The results obtained will allow establishing the suitable selection of the primary and secondary protection systems to the structures that are intended to be restored and build in the study area.