Global offshore wind power ended 2025 with a combination of signals: less annual installed volume, higher power wind turbines, and a visible advance of Chinese manufacturers in the supplier ranking.
According to the Global Wind Energy Council's (GWEC) Supply Side Data 2025 report, 795 offshore wind turbines were installed in 2025, equivalent to 8,198 MW of new capacity. This represents a 22% decrease compared to 2024 .
This figure contrasts with the technological evolution of the segment. According to GWEC, the average size of offshore turbines installed in 2025 reached 10,312 kW , while the global onshore average was 6,160 kW .
The comparison highlights the difference in scale between the two segments: while onshore wind already exceeds 6 MW on average, offshore wind operates at over 10 MW per turbine. Offshore wind is moving towards turbines with higher unit capacity, even though the annual market has declined in volume.
Fewer MW installed, but larger turbines
The decline in the offshore market is not explained by a technological setback, but by the annual performance of the facilities and by the variation in the volume delivered by some manufacturers.
GWEC notes that Dongfang and CSSC Haizhuang experienced significant declines compared to 2024: their new offshore installations fell by 81% and 91% , respectively. Mingyang also reduced its annual offshore installations by 22% year-on-year , although it remained among the top three manufacturers in the segment.
Even so, the average power of installed equipment continued to rise. Global offshore wind reached 10,312 kW per turbine, and by region, Europe recorded an average of 10,709 kW , while Asia Pacific reached 10,201 kW .
This last piece of data is relevant because 2025 was the first year in which the Asia Pacific offshore average exceeded the 10 MW threshold, a sign that the race for larger turbines is no longer concentrated exclusively in Europe.
China gains ground in the annual ranking
GWEC's annual offshore ranking shows a clear advance of Chinese manufacturers.
The top ten offshore providers in 2025 consisted of:
- Goldwind: 25.48%.
- Siemens Gamesa: 17.42%.
- Mingyang: 16.67%.
- Vestas: 14.19%.
- SEWPG: 11.20%.
- Envision: 8.64%.
- Dongfang: 2.55%.
- SANY: 1.93%.
- Windey: 1.21%.
- CSSC Haizhuang: 0.67%.
Eight of the top ten offshore wind turbine manufacturers of the year were Chinese. The two leading non-Chinese brands in the ranking were Siemens Gamesa and Vestas .
However, China's progress must be interpreted with some precision: a significant portion of these facilities were concentrated in China. Not all Chinese manufacturers yet have an international presence equivalent to their domestic market share.
Goldwind leads the year with all its volume in China
The leading offshore provider in 2025 was Goldwind .
The company installed 242 offshore turbines , equivalent to 2089 MW , all in China. With this volume, it climbed two positions to first place in the annual ranking, with a 25.48% market share.
Goldwind's leadership demonstrates the scale of the Chinese market and the ability of its manufacturers to occupy top global positions by annual volume.
However, its 2025 offshore leadership was entirely supported by the domestic market, unlike Siemens Gamesa and Vestas, which registered installations in several markets.
Siemens Gamesa maintains international standing
Siemens Gamesa came in second in the annual offshore ranking, after falling one position compared to 2024.
The company installed 147 offshore turbines , equivalent to about 1.4 GW , distributed across five markets: France, Germany, the United Kingdom, South Korea and Taiwan .
The difference compared to Goldwind lies in geographical diversification. While Goldwind concentrated all its offshore volume in China, Siemens Gamesa maintained a presence in European and Asian markets.
In cumulative terms, Siemens Gamesa maintains its global leadership in offshore wind. GWEC reports 94,710 MW of installed offshore capacity worldwide by the end of 2025 , and the company remains in first place overall, although it lost nearly two percentage points of market share compared to 2024.
Mingyang, Vestas, SEWPG and Envision complete the leading block
Mingyang ranked third in the annual offshore rankings, with a 16.67% market share. It installed 105 turbines , all in China, and its offshore installations fell 22% year-on-year .
Vestas ranked fourth, with 92 turbines and 1163 MW installed in five markets: Germany, France, Poland, Taiwan, and Japan . Its annual market share was 14.19% .
SEWPG ranked fifth, with 92 offshore turbines installed in China and an 11.20% market share. According to GWEC, it increased its annual share by three percentage points compared to the previous year.
Envision ranked sixth, with an 8.64% market share. It was one of the fastest-growing brands, as its new offshore installations quadrupled compared to 2024.
SANY and Windey enter the offshore top ten
China's advance is also evident in the expansion of its manufacturing base.
In 2025, SANY and Windey entered the top ten offshore wind farms for the first time. SANY installed 19 turbines , equivalent to 158 MW , while Windey added 11 turbines , equivalent to 99 MW .
Both companies installed all their offshore capacity in China.
Although they still have smaller volumes compared to the leaders, their entry shows that the Chinese offshore industry is diversifying and that more manufacturers are starting to compete in the marine segment.
The overall standings still favor Siemens Gamesa and Vestas
The annual ranking shows China's advance, but the historical cumulative data presents a different balance.
According to GWEC, by the end of 2025 there were 94,710 MW of installed offshore capacity globally . Siemens Gamesa and Vestas together accounted for 43.8% of that total, although that share fell by 1.1 percentage points compared to 2024.
Siemens Gamesa retained its overall lead, Mingyang moved up to second place, and SEWPG came in third. Vestas maintained its position and slightly increased its market share compared to the previous year.
This marks a difference between annual volume and cumulative trajectory: China gains weight this year, while European manufacturers retain a significant historical share.
An industry with lower volume, but greater technological scale
GWEC data summarizes an offshore paradox in 2025.
The annual market fell 22% , to 8,198 MW installed. But the average power of offshore wind turbines reached 10,312 kW , confirming that the segment continues to move towards larger machines.
At the same time, Chinese companies gained a foothold in the annual ranking: Goldwind led the market, Mingyang came in third, SEWPG fifth, Envision sixth, and SANY and Windey entered the top ten for the first time.
The message is clear: 2025 was a year of lower volume for offshore wind, but not of less competition. The sector installed fewer MW than in 2024, with larger turbines and a manufacturer landscape increasingly skewed towards China in the annual rankings.
