As one of the most impactful assets in renewable energy, offshore wind farms have appeared on the global stage at the same time as the world pivots to cleaner sources of energy. These gargantuan structures that rise from the sea, harnessing the immense might of the ocean winds are transforming the energy sphere. In 2025, we are witnessing strides in technological sophistication and more importantly, unbounded goals.
The growth of offshore wind farms has been exponential in the last decade and the newest generation of wind farms sports towering turbines, offshore subsea infrastructure, and long distance electric transmission. Such advancements have increased output and reduced construction expenditure. Countries all around the world are rushing to claim supremacy over the North Sea’s offshore wind facilities and the Asian sea coasts.
Now, powered by sustainable energy, let’s check out the Top 10 Largest Offshore Wind Farms in the world in 2025, and how these mega projects enable millions of homes while powering multiple green initiatives.
1. Hornsea Wind Farm 2 (UK) – 1,300 MW
As of 2025, Hornsea 2 takes the lead as the largest offshore wind farm in the world. This wind farm is the reason behind the Danish energy giant’s Ørsted wind power ventures which are located 89 km off the Yorkshire coast in the Southern North Sea.
- Capacity: 1.3 GW
- Operator: Ørsted
- Ownership: Ørsted A/S, Crédit Agricole Assurances, AXA IM Alts
- Homes Powered: 1.3 million
Hornsea 2 Forecasters as an addition to the Hornsea Zone vision that comprises Hornsea 1, 3 and 4. The region’s objectives are to foster wind pulverization for renewable energy accumulation of up to 6 GW. Apart from a powerful transmission grid, integrating land and sea based components, the project has placed 165 grade 8 MW turbines built by Siemens Gamesa, each capable of powering 8 MW.
The Integrative Components from leading sponsors and furniture along with Balfour Beatty fuels Hornsea 2 showcase of engineering collaboration globally. It now acts as one of the pillars in clean energy sustainability on terror accepted to life sustainability.
2. Hornsea Wind Farm 1 (UK) – 1,218 MW
Hornsea 1 was the world’s largest offshore wind turbine before being dethroned by Hornsea 2. It became operational in 2020, and was the first offshore wind farm to surpass the 1 GW milestone.
- Capacity: 1.218 GW
- Operator: Ørsted
- Homes Powered: More than 1 million
- Owned by: Ørsted A/S and Octopus Renewables, GLIL Infra, Others
Located 120 km off the coast and spanning 407 square kilometers, Hornsea 1 features 174 Siemens Gamesa turbines, each delivering 7 MW. The project benefits significantly from the 900 km of cables and substations that have already been built.
To further the goal of decreasing the UK’s dependence on fossil fuels, Hornsea 1 will be pivotal in fulfilling the visions set out in ‘Project Z’.
3. Dogger Bank Wind Farm A (UK) – 1,200 MW
Look to find innovation in wind turbines at Dogger Bank A, one of the phases in the world’s largest wind farm under construction.
- Capacity: 1.2GW
- Operator: Equinor
- Ownership: SSE Renewables, Equinor ASA, Vårgrønn AS
- Turbines: GE Haliade-X 13 MW
Located 131 kilometers offshore from Yorkshire, Dogger Bank A started operating in 2023 with a UK industry first, high-voltage direct current (HVDC) power transmission. Its massive Haliade-X turbines have blades measuring 107 meters, capable of powering a British household for two days with a single rotation!
Scheduled for full completion in late 2025, Dogger Bank A is only the first phase of the wider Dogger Bank project, which will have an expected total capacity of 3.6 GW.
4. Seagreen offshore Wind Farm 1 (Scotland) – 1,075MW
Seagreen 1 also takes the crown for being Scotland’s largest offshore wind farm, located at a distance of 27 km from the Angus coastline and fully operating in the year 2023.
- Capacity: 1.075 GW
- Operator: SSE Renewables
- Ownership: SSE Renewables, TotalEnergies, PTTEP
- Homes Powered: ~1.6 million
Supported by 114 units of Vestas V164-10.0 MW turbines, Seagreen stands as an engineering achievement. This offshore wind farm is a drastic contribution to Scotland’s net-zero aims by cutting over 2 million tonnes of annually emitted CO₂.
Moreover, it uses AI technology to autonomously inspect underwater structures using AUVs, reducing inspection time by fifty percent—an engineering milestone.
5. Triton Knoll Wind Farm (UK) – 857 MW
Triton Knoll represents one of the largest players in the offshore wind industry, situated between the seas of Lincolnshire and North Norfolk.
- Capacity: 857 MW
- Operator: RWE
- Ownership: RWE, J-POWER, Kansai Electric Power
- Homes Powered: ~800,000
The project completed construction in early 2022, after being equipped with 90 Vestas V164-9.5 MW turbines, overcoming COVID challenges. Beyond energy, Triton Knoll bolstered regional economies with thousands of jobs and revitalized Grimsby’s Royal Docks.
6. East Anglia Wind Farm 1 (UK) – 800 MW
Part of the Iberdrola Group’s majeure shift towards renewables, East Anglia ONE has been operational since 2019.
- Capacity: 800 MW
- Operator: ScottishPower Renewables
- Ownership: ScottishPower Renewables, Green Investment Group
- Homes Powered: ~630,000
The project, which is 50 km off the coast of Suffolk, covers an area of 300 km² and was developed at a cost of £2.5 billion. With further expansion plans (such as East Anglia TWO and THREE), the region is quickly transforming into a renewable powerhouse.
7. Hollandse Kust Noord (Netherlands) – 759 MW
- This Dutch project showcases innovation and sustainability.
- Capacity: 759 MW
- Operator: CrossWind (Shell and Eneco joint venture)
- Homes Powered: ~1 million
Hollandse Kust Noord is approximately 18 km off the Dutch coast. It’s part of a Dutch initiative to transition to 70% renewable electric energy by 2030. This project incorporates solar panels, floating platforms, and production of green hydrogen, setting the benchmark for future offshore wind farms.
8. Walney Extension (UK) – 659 MW
Part of Ørsted’s legacy of innovation in the Irish Sea, Walney Extension came online in 2018 and remains a landmark project.
- Capacity: 659 MW
- Operator: Ørsted
- Ownership: Ørsted, PKA Group, PFA Pension
Featuring 87 turbines (a mix of MHI Vestas and Siemens models), it covers an area of 145 km². Walney was the world’s largest offshore wind farm at its commissioning and still serves as a model for the reliable offshore delivery of energy.
9. London Array Wind Farm (UK) – 630 MW
While still one of the top offshore wind farms in the world, London Array lost the title of largest offshore wind farm in the world.
- Capacity: 630 MW
- Operator: RWE
- Ownership: RWE, Ørsted, CDPQ, Masdar
- Homes Powered: ~500,000
Wind Farm Power Plants in UK
RWE powers ~500,000 homes and has been operational since 2013, London Array which is located in Thames and thames estuary was one of the earliest constructed offshore wind power plants to show sustainability leadership within UK and still serves as a sustainable energy provider.
10. Greater Changhua Southeast (Taiwan) – 605 MW
Taiwan has a greater changhua southwest too which marks its presence on the map as the groundbreaking offshore wind plants in Asia with Taiwan Southeast showcasing the clean energy ambition in Taiwan.
- Capacity: 605 MW
- Operator: Ørsted
- Ownership: Ørsted, CDPQ, Cathay Capital
The newly constructed wind farms in Soak Strait Taiwan serve as a lighthouse to Asian nations showcasing the combined benefits of public and private partnership in producing clean power on a large scale foundation.
Final Thoughts: Offshore Wind Farms Are the Future
Serving over 1000 jobs and still in the race to show the world offshored wind power plants are a blend of engineering miracles and the stunning world vision revolving around sustainability makes them futuristic goals. And for us, the journey has just begun. Even though UK, Germany and Denmark take the lead, countries like Taiwan, US and China are picking up the pace.
The competition for changing the energy system and supporting greenhouse gas mitigation is rising on a global basis.
Therefore, the next time you come across the phrase “offshore wind farms,” remember these glaring beasts of the ocean—remaining stationary and motile while revolving noiselessly, and powering a cleaner, more environment-friendly future.