Abstract: This study focuses on the potential impact of green hydrogen on seaports and the things the latter should do in anticipation. We particularly explore the critical challenges and opportunities green hydrogen can bring to the economics and governance of seaports. We start the debate by discussing the fast-growing public and private interest in green hydrogen as part of the energy transition trajectory. Then, we analyze key considerations when placing green hydrogen in a seaport context. These range from the role of green hydrogen in the changing energy landscape of ports and the geo-economic repercussions of the adoption of green hydrogen on a port’s cargo flows, to the role of seaports in driving down the costs of a green hydrogen economy vis à vis those of a fossil-based economy. We conclude this editorial with a detailed discussion on the role of landlord port authorities in the adoption of green hydrogen as part of the energy transition.