The offshore wind industry is entering an era of exponential growth. As of 2025, more than 83 GW of capacity is now operational worldwide, with 5.6 GW of new projects reaching final investment decisions this year alone, a 107% increase compared to 2024.

The largest upcoming offshore wind farm projects in the world are Europe’s 10 GW AquaVentus in the North Sea, Australia’s Gippsland offshore wind developments with a potential 25 GW, Sweden’s Sylen project at 8.7 GW, and the Dutch Nederwiek and Doordewind wind farm zones totalling 10 GW combined. 

Other offshore wind farm projects include Denmark’s Bornholm Energy Island, Sweden’s Eystrasalt, and Ørsted’s Gävle Öst and Gävle West projects, which together are reshaping the scale and ambition of offshore wind globally.

This blog provides a complete overview of the Top 10 Largest Offshore Wind Farm Projects in the World 2025, highlighting their capacity, locations, developers, and current development status.

List of Top 10 Biggest Offshore Wind Farm Projects in the World 2025 (according to the capacity)

Gippsland Victoria Offshore Wind Developments

The Gippsland offshore wind zone is Australia’s first declared offshore renewable energy area, identified in August 2022 and the cluster of the largest wind farm projects in the world in terms of capacity. In 2024, the federal government awarded 12 feasibility licences for projects in this region, representing a potential capacity of 25 GW. An additional licence was later awarded for the Southern Ocean declared area, bringing the total to 13 licence holders in Victoria.

Wind resources in Bass Strait average above 8 m/s, and the shallow coastal waters, less than 50 metres deep, extend up to 35 kilometres from shore, creating ideal conditions for offshore wind development. The Victorian government has set clear capacity milestones of 2 GW by 2032, 4 GW by 2035, and 9 GW by 2040.

The state is advancing its offshore wind plan under the Offshore Wind Energy Implementation Statement 4 (IS4), released in April 2025. The government is currently running a Registration of Interest process to prepare developers for the Request for Proposal stage. The RFP process will open in September 2025, and winning projects will be awarded contracts by the fourth quarter of 2026.

Support mechanisms will include Contracts for Difference (CfDs) to ensure revenue certainty and availability payments activated once projects begin generating electricity. These measures aim to secure investment while ensuring a reliable power supply from the new offshore wind capacity.

Feasibility licences are granted in May and July 2024, and the registration of Interest process opens in late 2025. The government is planning to launch a Request for Proposal in September 2025. Contracts are expected before October 2026.

AquaVentus Offshore Wind

The AquaVentus initiative is one of Europe’s largest upcoming offshore wind farm projects, targeting 10 GW of installed capacity by 2035. The project will be capable of supplying renewable power to millions of households and will play a central role in advancing Europe’s clean energy transition.

AquaVentus is notable for its integration of offshore hydrogen production. Surplus wind power will be used to electrolyze seawater directly at sea, with the hydrogen transported to shore via pipelines. This approach reduces transmission losses and establishes a sustainable supply chain for green hydrogen.

Another defining feature is the project’s use of floating wind turbine technology. By deploying turbines in deeper waters unsuitable for fixed-bottom foundations, AquaVentus opens access to vast untapped wind resources. This technological leap will expand Europe’s offshore wind potential beyond traditional shallow-water zones.

The AquaVentus consortium combines industry leaders and research institutions committed to developing advanced renewable energy infrastructure while aligning with the European Union’s decarbonization targets. Once operational, the project will stand as one of the world’s largest offshore wind farms and a flagship for integrating offshore wind with large-scale hydrogen production.

Sylen Offshore Wind

The Sylen offshore wind power plant is among the largest planned renewable energy projects in Europe, with a total capacity of 8,675 MW. Located in the Gulf of Bothnia, the project is being developed by SVEA Vind Offshore in partnership with Iberdrola Renovables Energia S.A.

The developer secured exploration permits for seabed and environmental studies in 2022 under Sweden’s continental shelf legislation. In January 2024, Sylen submitted a formal application for a construction permit within Sweden’s Exclusive Economic Zone, alongside an application for submarine cable installation. The application seeks a 50-year operational permit, requiring construction to begin within the first 15 years.

The project design includes 347 offshore turbines with a maximum tip height of 350 metres. Once operational, Sylen is expected to deliver clean power equivalent to nearly 8.7 GW, supporting Sweden’s renewable energy expansion and wider European decarbonization targets. The estimated cost for the project is around USD 13 billion, with full commissioning planned by 2033, subject to government approvals.

Nederweik Noord Offshore Wind

The Nederwiek Wind Farm Zone is a large-scale offshore wind development area in the Dutch North Sea with a total estimated capacity of 6 GW. Spanning approximately 600 square kilometres, the zone is divided into four designated sites. Nederwiek IA and IB are each designed for 1 GW of capacity, while sites II and III will accommodate 2 GW each.

OWC, subcontracted by DHI, completed the wind resource assessment in 2024 to support Dutch authorities in evaluating the zone’s generation potential. The project is being developed through a phased tendering process managed by RVO.

The first tender for Nederwiek IA will be launched in late 2025, with construction permits awarded to successful bidders. Due to a permitting delay for Nederwiek IB, the initial tender round will allocate 3 GW across three sites instead of the originally planned 4 GW.

Nederwiek is positioned over 100 kilometres offshore, making it invisible from the Dutch coast. The zone is expected to begin supplying renewable power around 2030–2031, significantly contributing to the Netherlands’ offshore wind capacity targets and Europe’s broader energy transition goals.

Gavle Ost Offshore Wind Farm

The Gävle Öst Offshore Wind Farm is one of Sweden’s largest planned offshore wind projects, with a potential capacity of up to 5.5 GW. Developed by Ørsted, the project will be located in the Swedish Economic Zone in the Baltic Sea, strategically positioned to supply renewable electricity to meet rising regional demand.

The Finnish Environment Agency initiated the project’s Environmental Impact Assessment (EIA) in April 2024, with consultations currently ongoing. Detailed site investigations are planned from 2025 to 2028 to prepare for construction. Offshore substations are expected to be installed between 2029 and 2032, alongside onshore export cables and substations planned for 2030–2031.

The design includes between 192 and 324 offshore wind turbines, each ranging from 15 MW to 25 MW in capacity. Once operational in the 2030s, the Gävle Öst Offshore Wind Farm will be a major contributor to Sweden’s renewable generation capacity.

Gavle West Offshore Wind

The Gävle West Offshore Wind Farm is a large-scale offshore wind development planned by Ørsted in the Swedish Economic Zone of the Baltic Sea. The project will cover a 1,050 km² area, making it one of the largest offshore wind zones under planning in Sweden.

Ørsted, as the sole owner and developer, is advancing the project through early-stage surveys and permitting. Surveys began in April 2024 and continued for eight months to inform environmental, geological, and engineering assessments.

Construction of the offshore wind farm is expected to begin in 2030, with full commercial operation scheduled for 2032. Once commissioned, Gävle West will add significant offshore wind capacity to Sweden’s renewable energy mix, complementing projects such as Gävle Öst and Sylen in the Baltic Sea.

Sunnanvind Offshore Wind

The Sunnanvind project is a government-led offshore wind project aiming to unlock the renewable energy potential of Åland’s northern maritime areas. Spanning 674 square kilometres, identified in the Maritime Spatial Plan of 2021, the designated zones lie 15 to 45 kilometres off Åland’s coast and represent some of the most suitable offshore wind sites in the Baltic Sea.

The project is supported by EUR 1.7 million in funding from the EU’s Recovery and Resilience Facility. Its mission is to design and implement a competitive auction process to lease seabed areas and allocate concessions for offshore wind farm development.

In May 2025, the Government of Åland launched a public consultation to present the master plan outline and draft environmental report. At the same time, Åland is seeking a commercial advisor to design and manage the auction process for prospective developers.

The Sunnanvind project is required to submit its final report to the European Commission by June 2026. Beyond this phase, the Government of Åland will continue to oversee seabed use and safeguard Åland’s long-term economic and environmental interests throughout the lifespan of the offshore wind farms.

Doordewind Offshore Wind

The Doordewind Wind Farm Zone is a major offshore wind development area located 77 kilometres off the Dutch coast. Covering approximately 565–580 square kilometres, the zone is divided into two designated wind farm sites, each designed to accommodate 2 GW of offshore wind capacity.

Seabed surveys were completed by Belgian contractor G-TEC in March 2025 to support site characterization and planning. In August 2025, Pondera, in collaboration with Waardenburg Ecology, TNO, MARIN, NewGround Law, and HWE, initiated the Environmental Impact Assessment (EIA) process, expected to conclude in 2026.

The Dutch government confirmed in 2024 that only Doordewind I (2 GW) will proceed in the initial phase, with Doordewind II postponed for later development. TenneT will build one offshore grid connection and platform for the first site, which will be the first Dutch offshore wind farm connected to Eemshaven.

The tender process for Doordewind I is scheduled to open between Q1 and Q2 of 2027, with construction to follow and commissioning planned for the fourth quarter of 2032. Once complete, the Doordewind zone will contribute 4 GW of renewable power to the Netherlands’ ambitious offshore wind expansion targets.

Eystrasalt Offshore Wind

The Eystrasalt Offshore Wind Farm is one of Sweden’s most advanced large-scale offshore wind projects, with a planned capacity of 3.9 GW. Located in the Gulf of Bothnia off Gävleborg County, the project will be developed in a single phase by Skyborn Renewables.

The wind farm will feature 256 turbines and is designed to generate around 15,000 GWh of renewable electricity annually, significantly contributing to Sweden’s decarbonization and energy security goals.

In October 2023, the Swedish government tasked regional and national authorities with preparing multiple permit applications, including those related to submarine cables. In July 2024, the County Administrative Board of Gävleborg formally recommended government approval of the project.

Construction is expected to commence in 2025, with commercial operations starting in 2029. Once operational, Eystrasalt will rank among the largest offshore wind farms in Northern Europe and play a key role in integrating large-scale renewable generation into Sweden’s energy system.

Bornholm Energy Island Offshore Wind

The Bornholm Energy Island (BEI) project is a hybrid offshore wind initiative linking multiple wind farms via a centralized energy hub on the Danish island of Bornholm. The hub will transmit 3.8 GW of offshore renewable electricity to Denmark and Germany, powering millions of households and businesses.

Funding from the European Commission (EUR 645.2 million) through the CEF Energy program supports the construction of two converter stations (on Bornholm and Zealand) and the installation of a high-voltage submarine cable network. The HVDC cable system, supplied by NKT, covers a 200-kilometre offshore route and a 16.8-kilometre onshore connection, operating at 525 kV.

The project is designed to optimize renewable electricity distribution, support grid stability, and enhance integration of large-scale offshore wind into the regional energy system. The Danish Energy Agency has outlined the strategic framework for BEI under its Plan for Program Bornholm Energy Island, ensuring a coordinated approach for offshore wind generation and energy transmission.

Construction is ongoing in preparation for operations in the early 2030s, positioning the Bornholm Energy Island as one of Europe’s largest and most innovative offshore wind hubs.

Conclusion

These mega offshore wind projects are more than just numbers on a capacity chart. By harnessing high wind speeds in deep and distant waters, integrating advanced turbine and floating technologies, and linking generation to energy hubs and hydrogen production, these farms are setting new standards for clean electricity production. 

China continues to dominate global installations, followed by the UK, Taiwan, Germany, and France, while the cumulative market is led by China, holding half of the world’s offshore wind capacity.

As governments and private developers push toward 2030 and 2040 renewable targets, offshore wind will become an even more central pillar of global energy systems. The next decade promises record-breaking capacity with smarter, more resilient grids, more sustainable supply chains, and a future where offshore wind can reliably power millions of homes while supporting the world’s net-zero ambitions.

Discover Global Offshore Wind Power Projects with Ease

Are you seeking reliable and up-to-date insights into offshore wind power projects worldwide?

Explore the Global Project Tracking (GPT) platform by Blackridge Research, your go-to resource for the latest offshore wind power projects and tenders across all stages:

• Upcoming Projects

• Tender Notices

• Contract Awards

• Projects Under Construction

• Completed Projects

Book a Free Demo today and see how the GPT platform can help you unlock opportunities and achieve your business goals.