How does ocean energy differ from offshore wind in terms of reliability?

Unlike offshore wind, which is subject to highly variable and unpredictable weather patterns, tidal energy is completely predictable as it is governed by gravitational cycles. Wave energy is also significantly more consistent and has a higher energy density than wind, allowing for more stable grid integration and baseload-like power generation.

What are the primary barriers preventing ocean energy from reaching its 13% global potential?

The primary obstacles are high capital costs, lack of technology standardization, and the extremely harsh marine environment which accelerates wear and tear on equipment. Additionally, securing permits for marine spatial planning and establishing grid connections in remote coastal areas remain significant regulatory and logistical hurdles.

Can ocean energy realistically support global desalination efforts?

Yes, ocean energy is uniquely co-located with desalination needs along coastal zones. Wave and ocean thermal technologies can directly drive mechanical desalination pumps or provide steady, localized electricity to reverse osmosis plants, eliminating the transmission losses and carbon emissions associated with powering these facilities from the main grid.

Offshore Energy · July 2, 2026 (Jul 2) · 1 min read

Ocean energy can supply 13% of global electricity demand, report says

Analysis

AI-assisted analysis · reviewed by Yuri Kan

A new industry report highlights that ocean energy—encompassing wave, tidal, ocean thermal, and salinity gradient technologies—has the technical potential to meet 13% of global power needs and over a fifth of global water desalination requirements. While still in its commercial infancy compared to offshore wind, the sector represents a critical frontier for diversifying the marine renewable energy mix. For offshore oil and gas operators, this projection underscores a long-term transition pathway where marine engineering expertise can be redeployed into highly predictable, non-intermittent clean energy assets.

Key Facts

A comprehensive industry report asserts that ocean energy technologies have the theoretical capacity to satisfy 13% of the world's total electricity demand.
The report estimates that ocean energy systems could additionally power 21% of global water desalination needs, addressing critical freshwater scarcity in coastal regions.
The scope of the study covers multiple marine energy vectors, including wave energy converters, tidal stream turbines, ocean thermal energy conversion (OTEC), and salinity gradient power.
Currently, wave and tidal technologies represent the most advanced segments within the ocean energy portfolio, though they still lag significantly behind offshore wind in terms of installed capacity and cost reduction.
The realization of this 13% global electricity share is contingent upon massive capital deployment, regulatory streamlining, and grid integration support over the coming decades.

Background & Context

For over two decades, the marine renewable energy sector has struggled to transition from pilot demonstration projects to commercial-scale utility deployment due to harsh marine environments, high levelized costs of energy (LCOE), and limited supply chain integration. Unlike offshore wind, which leveraged onshore wind turbine technology, wave and tidal developers have had to design systems from scratch, leading to a fragmentation of technological designs. However, as governments globally target net-zero emissions by 2050 and seek to balance grids with predictable, non-weather-dependent renewables, ocean energy is receiving renewed policy attention and funding.

Market Impact

The projected expansion of ocean energy presents a dual scenario of competition and opportunity for traditional offshore oil and gas stakeholders. In the medium term, the supply chains, specialized vessel fleets, and offshore engineering expertise of the hydrocarbon sector will be vital for installing and maintaining heavy underwater turbines and wave energy absorbers. Financially, utility companies and state-backed energy giants will need to significantly increase capital expenditure (CapEx) allocations toward marine renewables to drive down the LCOE to competitive levels. Furthermore, coastal municipalities and heavy industries, particularly desalination plants, stand to benefit from a localized, highly reliable power source that reduces reliance on imported fossil fuels.

What to Watch

The immediate milestone to watch is the deployment of the next generation of multi-megawatt tidal and wave arrays currently slated for testing in European and North American waters. Analysts should monitor whether governments introduce dedicated feed-in tariffs and ring-fenced contracts for difference (CfDs) specifically for ocean energy, as these policy mechanisms are essential for attracting private project finance. Over the next three to five years, the rate of convergence on standardized technology designs will dictate how quickly the industry can achieve economies of scale.

Why This Matters for Cyprus

For Cyprus and the wider Eastern Mediterranean, which face high electricity costs and acute water scarcity, ocean energy—particularly wave power and ocean thermal energy conversion—offers a promising long-term solution. The region's deep waters and high solar radiation levels, which heat surface waters, make it a potential candidate for OTEC and wave-powered desalination projects, reducing the island's heavy reliance on imported fuel oil for water production.

Frequently Asked Questions

How does ocean energy differ from offshore wind in terms of reliability?: Unlike offshore wind, which is subject to highly variable and unpredictable weather patterns, tidal energy is completely predictable as it is governed by gravitational cycles. Wave energy is also significantly more consistent and has a higher energy density than wind, allowing for more stable grid integration and baseload-like power generation.
What are the primary barriers preventing ocean energy from reaching its 13% global potential?: The primary obstacles are high capital costs, lack of technology standardization, and the extremely harsh marine environment which accelerates wear and tear on equipment. Additionally, securing permits for marine spatial planning and establishing grid connections in remote coastal areas remain significant regulatory and logistical hurdles.
Can ocean energy realistically support global desalination efforts?: Yes, ocean energy is uniquely co-located with desalination needs along coastal zones. Wave and ocean thermal technologies can directly drive mechanical desalination pumps or provide steady, localized electricity to reverse osmosis plants, eliminating the transmission losses and carbon emissions associated with powering these facilities from the main grid.

Read on Offshore Energy