The Port of Naantali serves the trade in a wide range of the hinterland as well as the industry close to the port. Industrial enterprises and factories (e.g. oil refinery, lubricant factory, coal power plant, betaine factory, grain silos etc.) operating in the immediate vicinity of the harbor generate large material flows. Easy ice condition in wintertime and one of the deepest fairways and quays in Finland, up to 15,3 m, enable Aframax tankers and Panamax size bulk carriers loading and/or discharging regularly at the port.
Moreover, the short sea voyage and frequent ferry connection to Sweden make Naantali the most important cargo hub between Finland and Scandinavia. Partly, for these reasons, Naantali is one of the largest universal cargo port in Finland. The total annual traffic to and from the port is ca. 7–8 million tons, of which 80 % is foreign traffic. The main volumes come from liquid and dry bulk materials and ferry goods. The Port of Naantali is one of the busiest cargo ports in Finland with ca. 2000 annual number of vessel calls.