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.
As of 2025, global marine energy capacity amounted to *** megawatts. From that, *** megawatts were reported in South Korea and *** megawatts were in France. By comparison, China and Spain had a marine energy capacity of about **** megawatts each.
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IRENA. (March 31, 2026). Marine energy capacity worldwide in 2025, by country (in megawatts) [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved July 21, 2026, from /statistics/1031127/marine-energy-capacity-globally/
IRENA. "Marine energy capacity worldwide in 2025, by country (in megawatts)." Chart. March 31, 2026. ÌÇÐÄÆÆ½â°æ. Accessed July 21, 2026. /statistics/1031127/marine-energy-capacity-globally/
IRENA. (2026). Marine energy capacity worldwide in 2025, by country (in megawatts). ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: July 21, 2026. /statistics/1031127/marine-energy-capacity-globally/
IRENA. "Marine Energy Capacity Worldwide in 2025, by Country (in Megawatts)." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 31 Mar 2026, /statistics/1031127/marine-energy-capacity-globally/
IRENA, Marine energy capacity worldwide in 2025, by country (in megawatts) ÌÇÐÄÆÆ½â°æ, /statistics/1031127/marine-energy-capacity-globally/ (last visited July 21, 2026)
Marine energy capacity worldwide in 2025, by country (in megawatts) [Graph], IRENA, March 31, 2026. [Online]. Available: /statistics/1031127/marine-energy-capacity-globally/