Few issues are shaping the future of the maritime sector as profoundly as decarbonisation. For ports, harbours and marinas, the challenge is not just about reducing their own emissions, but about supporting a much wider transition across shipping and energy.

The direction of travel is clear. International and domestic targets are pushing towards net zero, with increasing pressure on all parts of the supply chain to adapt. Yet the route to get there remains far less certain.

The central role of ports

Ports sit at the centre of this transition. They are not only transport hubs, but also gateways for energy, trade and industry. This puts them in a unique position, but it also creates complexity.

They are being asked to invest in infrastructure, enable new fuel types and support cleaner operations, often without a fully defined national policy framework to guide them.

In practice, many ports are already taking significant steps. Renewable energy supply is becoming more common, while there is growing interest in hydrogen, methanol and biofuels. Onshore power systems are also developing, allowing vessels to plug in rather than run their own diesel engines while berthed.

Key barriers to progress

Despite this momentum, a number of challenges remain.

Infrastructure is a major constraint, particularly when it comes to grid capacity, which limits the ability of some ports to fully scale up electrification. Alongside this, the cost of investment is significant, and funding mechanisms are still developing.

Commercial realities also play a role. In some cases, traditional fuels remain cheaper and more accessible, creating a tension between environmental ambition and operational practicality.

Overlaying all of this is a degree of policy uncertainty. While the long-term direction is clear, there is still a lack of detail around how and when changes will be implemented, making it harder for operators to plan with confidence.

The role of ports as landlords and influencers

Ports are not only operators. Many also act as landlords, giving them the ability to influence behaviour across their sites.

Through lease agreements, operational requirements and sustainability initiatives, ports can encourage tenants and users to adopt more environmentally responsible practices. This is becoming an increasingly important lever for driving change.

Looking ahead

Decarbonisation is not a distant objective. It is already underway, and its pace is only likely to increase.

For ports and harbour operators, the challenge will be to balance immediate operational pressures with longer-term strategic investment, while remaining flexible enough to respond to ongoing regulatory and technological developments.

How we can help

Decarbonisation raises complex legal and commercial questions, from infrastructure investment and funding to regulatory compliance and contractual arrangements.

If you would like to explore how these issues may affect your organisation, please get in touch with Linda or a member of our Ports and Marinas team.