Global Marine Renewable Energy Market Outlook, 2031

The global marine renewable energy market is an emerging segment of the renewable energy industry, harnessing the power of tides, waves, ocean currents, thermal gradients, and salinity gradients to generate electricity and provide other energy services. The sector is undergoing a transformative shift from demonstration and pilot projects toward pre-commercial deployment, driven by the fundamental predictability of ocean resources and the growing need for reliable, baseload renewable power. Tidal energy is considered the most mature and commercially advanced marine technology, with the MeyGen project in Scotland having exported over 70 GWh of electricity to date, demonstrating not just technical feasibility but commercial viability. Wave energy is following a parallel trajectory, with CorPower Ocean's C4 device operating at the Aguçadoura site in Portugal and the company securing a EUR 40 million grant from the EU Innovation Fund to support the ViannaWave project, a 10 MW pre-commercial wave energy farm. Ocean thermal energy conversion has achieved a significant milestone with the successful sea trials of a 20 kW OTEC system in the South China Sea, while a storm-resistant OTEC platform has been installed off the coast of Gran Canaria, marking the first long-term offshore operation of an OTEC platform in decades. Japan began operating its first osmotic power plant in Fukuoka in August 2025, the world's second commercial-scale salinity gradient facility, demonstrating that the full spectrum of marine renewable technologies is now advancing toward commercial reality.

The global development of marine renewable energy exhibits significant regional imbalances, with Europe representing the most advanced and dynamic regional market, driven by supportive policy frameworks, dedicated test facilities such as the European Marine Energy Centre in Orkney, and a concentration of technology developers and project sites. Scotland continues to dominate tidal innovation, hosting the MeyGen project and Orbital Marine Power's floating O2 turbine, while France, Portugal, and Spain are leading wave energy development. The Asia-Pacific region is emerging as a significant growth corridor, with China achieving technical feasibility of OTEC systems in the South China Sea, Japan commissioning its first osmotic power plant, and South Korea and India exploring tidal and wave energy opportunities. North America is advancing through projects such as the PacWave test site in Oregon, which signed a historic power purchase agreement with the Bonneville Power Administration to supply wave-generated electricity to the U.S. grid for the first time. The competitive landscape includes technology developers and project developers such as SAE Renewables, Orbital Marine Power, CorPower Ocean, Eco Wave Power, Ocean Power Technologies, HydroQuest, Nova Innovation, and Global OTEC. Key obstacles include high capital costs and technical complexity, environmental and regulatory uncertainty, grid connection challenges, and the absence of standardized frameworks for permitting and licensing in many regions.

Market Dynamics

Market Drivers • Predictable and Consistent Resource: The most powerful driver across the global marine renewable energy market is the predictable and consistent nature of tidal and ocean current resources, which can be forecast decades in advance, unlike solar and wind. Tidal energy offers a level of consistency few renewables can match, with tides predictable to the hour. This predictability makes marine energy particularly valuable for grid operators seeking to balance the variability of other renewable sources. Ocean thermal energy is a type of marine energy with large reserves, the most stable energy, the highest density, and can be continuously exploited without limited weather. The theoretical power of ocean thermal energy resources in the world is estimated to be 60 billion kW, representing a vast and continuously available resource base.
• Island and Remote Community Power: Marine energy is particularly suited for island and remote coastal communities where grid connection is expensive or impractical, offering a locally available renewable resource. More than 740 million people live on islands, and many tropical islands and coastal communities suffer from high energy costs, unreliable electrical supplies, poverty, and underemployment, all exacerbated by climate change. OTEC offers a uniquely suited solution, using the temperature difference between warm surface water and cold deep water to drive a thermodynamic cycle that can supply round-the-clock baseload power to island communities exposed to climate risks. An off-grid marine current-powered seawater desalination and hydrogen production system has been designed and tested, with a 4 kW prototype built and validated in the workshop, demonstrating the feasibility of marine energy for combined freshwater and energy supply in remote areas. An integral renewable energy system for islands, combining ocean thermal, wind, and solar energy with ocean thermal energy conversion as the stabilizer, has been proposed, with levelized cost of power decreasing to 0.084 $/kWh and CO₂ reduction to 2.16 × 10⁴ tons.

Market Challenges • High Costs and Technical Complexity: Marine energy technologies remain significantly more expensive than established renewables, with high capital costs and complex engineering challenges in harsh marine environments. The technical feasibility of marine energy systems has been demonstrated, but operational challenges including intermittency, offshore infrastructure, and corrosion remain barriers to large-scale deployment. Current green hydrogen production costs using marine energy range from $2.50 to $6.80 per kilogram, with future targets aiming for $1/kg by 2030. The high upfront capital costs and the need for specialized installation vessels and expertise create barriers for new entrants and limit the pace of project development. Environmental impacts, regulatory frameworks, and marine spatial planning considerations add further complexity to project development.
• Environmental and Regulatory Uncertainty: The environmental impacts of marine energy devices are not fully understood, and regulatory frameworks for permitting and licensing remain undeveloped in many regions. Environmental impacts, regulatory frameworks, and marine spatial planning considerations are addressed in recent research, but practical implementation varies significantly across jurisdictions. The approval of the IMO Net-Zero Framework may provide a boost to marine energy by creating demand for zero-emission fuels, but regulatory uncertainty remains a significant constraint. Grid connection and infrastructure limitations also slow the pace of project development, particularly for offshore installations far from existing transmission infrastructure.



Market Trends • Tidal Stream Commercialization and Array Deployment: The most dynamic trend in the global marine renewable energy market is the progression of tidal stream energy toward commercial-scale array deployment. SAE Renewables is actively developing Phase 2 of the MeyGen site, targeting a 28 MW expansion supported by the UK government's Contracts for Difference scheme, which would triple the site's capacity. Orbital Marine Power's floating O2 turbine has been in operation in the Orkney Islands, delivering 2 MW of power, enough for around 2,000 homes annually, with next-gen O2-X turbines on the horizon aiming for a commercial array of 30 MW both at home and in export markets such as Nova Scotia and the U.S. HydroQuest's FloWatt project in France plans to install 17.5 MW of vertical-axis tidal turbines in Normandy by 2027. The Morlais project in Wales, one of the largest designated tidal zones globally, is hosting multiple developers deploying technologies across the site. The global tidal and wave energy market is projected to reach $1.3 billion by 2030, expanding at nearly 10% annually.
• Wave Energy Commercialization and Pre-Commercial Farms: Wave energy is advancing toward commercial deployment, with CorPower Ocean securing a EUR 40 million grant from the EU Innovation Fund to support the ViannaWave project, a pre-commercial 10 MW wave energy farm featuring 30 Wave Energy Converters generating approximately 30 GWh of clean electricity each year. CorPower Ocean has also been put in charge of a $35 million European project aimed at improving the competitiveness and bankability of wave energy farms, with large-scale validation work planned in U.K. waters. The company is developing a 5 MW wave energy farm off Scotland, to be deployed at EMEC's grid-connected Billia Croo wave energy test site, consisting of 14 wave energy converters operating for up to 15 years. PacWave, administered by Oregon State University, has signed a power purchase agreement with the Bonneville Power Administration, paving the way for wave-generated electricity to be supplied to the U.S. grid for the first time. Eco Wave Power launched its first U.S. wave energy project at the Port of Los Angeles, marking the first onshore wave energy installation in the U.S.

Segmentation Analysis

Tidal energy dominates the marine renewable energy market by technology because it is the most mature and commercially advanced marine technology, with the longest operational track record and the clearest pathway to commercial-scale deployment.
• Tidal stream energy is considered more established and closer to commercialization than the wave sector, with projects such as MeyGen in Scotland having exported over 70 GWh of electricity to date, demonstrating not just technical feasibility but commercial viability.
• The MeyGen project is described as the world's largest tidal stream array, with SAE Renewables actively developing Phase 2 targeting a 28 MW expansion supported by the UK government's Contracts for Difference scheme.
• Tidal energy offers a level of consistency few renewables can match, with tides predictable to the hour. Orbital Marine Power's floating O2 turbine has been in operation in the Orkney Islands, delivering 2 MW of power, enough for around 2,000 homes annually, with next-gen O2-X turbines on the horizon aiming for a commercial array of 30 MW.
• HydroQuest's FloWatt project in France plans to install 17.5 MW of vertical-axis tidal turbines in Normandy by 2027, with national and EU support.
• Key trends in the tidal energy segment include the deployment of larger turbines with higher capacity ratings, the development of floating tidal platforms for simplified installation and maintenance, and the transition from single-device demonstrations to multi-device arrays.
• The Morlais project in Wales is hosting multiple developers including Nova Innovation and Magallanes Renovables, deploying technologies across one of the largest designated tidal zones globally. Nova Innovation is preparing to deploy a 1.5 MW array in Nova Scotia's Bay of Fundy, supported by Canadian government funding.
• Key players in the tidal energy segment include SAE Renewables, Orbital Marine Power, HydroQuest, Nova Innovation, Magallanes Renovables, and Proteus Marine Renewables, alongside technology developers and project developers advancing tidal stream technologies globally.

Electricity generation dominates the marine renewable energy market by application because it represents the largest and most economically significant use of marine resources, with the potential to provide baseload power to grids and remote communities.
• Electricity generation is the primary application for marine renewable energy, with tidal, wave, and OTEC technologies all designed to produce grid-compatible electricity. Tidal energy offers a level of consistency few renewables can match, with tides predictable to the hour, making it valuable for grid operators seeking to balance the variability of other renewable sources.
• OTEC offers uniquely suited solutions for tropical island communities, using the temperature difference between warm surface water and cold deep water to drive a thermodynamic cycle that can supply round-the-clock baseload power.
• Key trends in the electricity generation segment include the deployment of larger turbines and arrays for utility-scale generation, the integration of marine energy with other renewable sources for hybrid power systems, and the development of grid-forming capabilities for enhanced grid stability. The global tidal and wave energy market is projected to reach $1.3 billion by 2030, expanding at nearly 10% annually, reflecting the growing commercial viability of marine energy for electricity generation.
• Key players in the electricity generation segment include SAE Renewables, Orbital Marine Power, CorPower Ocean, and Ocean Power Technologies, alongside utilities and independent power producers investing in marine energy projects.

Regional Analysis

Europe is the most advanced region globally for marine renewable energy because it hosts the world's most established policy framework, dedicated test facilities, and the highest concentration of technology developers and project sites.
• Europe represents the most dynamic regional market for marine renewable energy, driven by supportive policy frameworks, dedicated test facilities such as the European Marine Energy Centre in Orkney, and a concentration of technology developers and project sites.
• Scotland continues to dominate tidal innovation, hosting the MeyGen project and Orbital Marine Power's floating O2 turbine.
• France, Portugal, and Spain are leading wave energy development, with CorPower Ocean's C4 device operating at the Aguçadoura site in Portugal and HydroQuest's FloWatt project planning to install 17.5 MW of vertical-axis tidal turbines in Normandy by 2027.
• The Morlais project in Wales is hosting multiple developers including Nova Innovation and Magallanes Renovables, deploying technologies across one of the largest designated tidal zones globally.
• Key trends in the European market include the deployment of pre-commercial wave energy farms such as the ViannaWave project, the expansion of tidal stream arrays at sites including MeyGen and Morlais, and the development of storm-resistant OTEC platforms through the PLOTEC project.
• The UK's Severn Estuary holds immense promise, with a proposed tidal lagoon project that could contribute up to 7% of the country's electricity needs while catalyzing economic activity across the region. The EU Innovation Fund is supporting wave energy development through a EUR 40 million grant to CorPower Ocean for the ViannaWave project, demonstrating the European Union's commitment to advancing marine energy technologies.
• Key players in the European marine renewable energy market include SAE Renewables, Orbital Marine Power, CorPower Ocean, HydroQuest, Nova Innovation, Magallanes Renovables, and Proteus Marine Renewables, alongside technology developers and project developers advancing marine energy technologies across the continent.

Key development

• December 2025: Proteus Marine Renewables announced the successful completion of offshore maintenance and upgrade work at the world's largest tidal stream array, demonstrating the operational maturity of tidal energy technology.
• December 2025: The MeyGen tidal energy project in Scotland scheduled submarine works at the site between 10 and 17 December 2025, as part of ongoing operations and maintenance at the world's largest tidal stream array.
• November 2025: CorPower Ocean announced plans to develop a 5 MW wave energy farm off Scotland, to be deployed at EMEC's grid-connected Billia Croo wave energy test site, consisting of 14 wave energy converters operating for up to 15 years.
• October 2025: Global OTEC's storm-resistant ocean energy platform 'Don' was installed off the coast of Gran Canaria, developed under the EU's Horizon Europe-funded PLOTEC project. The prototype represents the next step in harnessing OTEC to deliver round-the-clock clean power to island nations most exposed to climate risks, marking the first long-term offshore operation of an OTEC platform in decades.
• August 2025: Japan's first osmotic power plant began operations in Fukuoka, the world's second operator to use salinity gradient power technology following a Danish firm that began doing so in 2023. The plant is expected to produce 880,000 kilowatt-hours of electricity annually, with the power used in a desalination facility.
• August 2025: CorPower Ocean secured a EUR 40 million grant from the EU Innovation Fund to support the development of ViannaWave, a pre-commercial 10 MW wave energy farm to be deployed off the coast of northern Portugal, featuring 30 Wave Energy Converters generating approximately 30 GWh of clean electricity each year.
• July 2025: CorPower Ocean announced the ViannaWave project, representing a major step toward achieving Portugal's National Energy and Climate Plan goal of 200 MW of installed wave energy capacity by 2030. The initiative positions Portugal at the forefront of the global wave energy sector and serves as a springboard toward broader gigawatt-scale rollouts.
• December 2025: Design, construction, and sea trials of the 20 kW OTEC system in the South China Sea were published, with the system successfully conducting sea trials and verifying the technical feasibility of this independently developed system. During the test period, the actual maximum power generation was 16.4 kW, and the cumulative power generation was 57.74 kWh.
• May 2025: PacWave, administered by Oregon State University, signed a power purchase agreement with the Bonneville Power Administration, paving the way for wave-generated electricity to be supplied to the U.S. grid for the first time. The agreement marks a major step for wave energy in the United States.

Considered in this report
Historic Year: 2020
Base year: 2025
Estimated year: 2026
Forecast year: 2031

Aspects covered in this report
Marine Renewable Energy Market with its value and forecast along with its segments
Various drivers and challenges
On-going trends and developments
Top profiled companies
Strategic recommendation

By Technology
• Tidal Energy
• Wave Energy
• Ocean Current Energy
• Ocean Thermal Energy
• Salinity Gradient Energy

By Application
• Electricity Generation
• Desalination
• Remote Power Supply
• Other Applications