Q: Who Discovered the Weddell Sea? James Weddell is believed to be the first person to discover and explore what would eventually become known as the Weddell Sea. Weddell and his crew reached the area in 1823, after mistaking some icebergs for land. Was this article helpful? Yes No Can't find the answers you're looking for? Contact our support team and we'll personally get back to you as quickly as we can.