It was only Indus site with an artificial brick dockyard. It must have served as the main seaport of the Indus people. It was nearly rectangular with the longer axis running from north to south. It was surrounded by a massive brick wall probably as flood protection. Lothal has evidence for the earliest cultivation of rice (1800 BC). The only other Indus site where rice husk has been found is Rangpur near Ahmedabad. Metalworkers, shell -ornament makers and bead maker's shops have been discovered here also.

Fire altars indicating the probable existence of a fire cult have been found. Evidence for the use of horse comes from a doubtful terracotta figurine of a horse. Impressions of cloth are noticeable on some of the sealing found here.