Marine energy capacity worldwide 2025| ��ƽ��

Global marine energy capacity from 2009 to 2025 (in megawatts)

Characteristic	Capacity in megawatts
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Source

Release date

March 2026

More information

Region

Worldwide

Survey time period

2009 to 2025

Supplementary notes

The source does not provide a definition of the term "marine energy", however, the data seems to correspond solely to tidal energy, rather than all energy harnessed from the natural movement of the oceans.

Some figures are subject to uncertainty, as indicated by the source through data qualifiers (e.g., estimated or uncertain values). This reflects varying data availability and reporting standards across countries.

Citation formats

In 2025, the global capacity of marine energy reached *** megawatts. This ocean energy is derived from the kinetic energy of ocean waves, tides, salinity, and differences in ocean temperatures.

Marine energy technologies

Marine energy, also known as ocean or hydrokinetic energy, includes technologies such as tidal and wave power. Tidal power generates energy from moving water masses, while wave power harnesses surface waves. Global capacity increased sharply between 2010 and 2011, from 250 to 503 megawatts, mainly due to large-scale tidal projects. Since then, capacity has remained relatively stable. South Korea and France lead globally, with around 255 and 212 megawatts of installed capacity, respectively.

In the United States, the Department of Energy supports marine energy through its Water Power Program, focusing on technology development, deployment, and resource assessment. Among marine energy sources, wave energy has the greatest potential in the U.S., estimated at up to 3,300 terawatt-hours per year.