The UK has approximately 16 GW of operational offshore wind capacity, with a further 8 GW under construction and 4.2 GW in pre-construction according to latest data available till April 2025. The world's largest offshore wind farm is located in the UK, the Hornsea Zone off the Yorkshire coast with a combined capacity exceeding 5 GW. 

The largest upcoming offshore wind farms in the UK in 2025 includes Berwick Bank, Ossian East Anglia Hub, MarramWind Floating wind farm, Morven Offshore wind farm, Hornsea Three and West of Orkney Offshore Wind Power Plant.

The offshore wind market in the UK is on a new rise. Let’s explore the top seven new offshore wind farm power projects in the United Kingdom (UK). We’ll further dive into the capacity, owner, contractors involved, and estimated cost for these projects.

List of Top Seven Upcoming Offshore Wind Farm Projects in United Kingdom (2025 Updated List)

Berwick Bank Offshore Wind Power Plant

Berwick Bank offshore wind farm is located in the North Sea, Scotland is the largest upcoming wind farm project in the UK. Having a capacity of 4,100MW the project is fully owned by SSE Renewables. The project expands over 1,680 square kilometers having 307 turbines and powering six million households in Scotland. Commercial operation is expected in the year 2027 with the reduction of 8 million tons of carbon dioxide emissions annually.

On July 31, the Scottish Government granted consent for SSE Renewables’ Berwick Bank project, which could become the world’s largest offshore wind farm. The Section 36 approval covers the project’s main offshore wind array in the outer Firth of Forth, off the East Lothian coast.

Berwick Bank Offshore wind power is aligned with the net-zero targets by Scotland and UK governments by 2030. Berwick Bank has already secured grid connections in the UK electricity grid, one in East Lothian and Northumberland. Also, the project is expected to create 4,650 jobs in Scotland and 9,300 in the UK. 

Various contractors are involved in the completion of projects, including UTEC for topographical and ground-penetrating radar surveys and RPS led the offshore Environmental Impact Assessment (EIA). 

The front-end engineering design (FEED) is done by the British Geological Survey, along with Cathie. Kent initially contributed to the concept design and was commissioned for the FEED and detailed design of WTG foundations and substructures.

Ossian Offshore Wind Power Plant

The Ossian Offshore offshore wind power project with 3,600 MW capacity upon its completion, is expected to power up to 6 million homes annually. The Ossian offshore wind farm is a joint venture between SSE Renewables, Marubeni Corporation, and Copenhagen Infrastructure Partners (CIP). It is located approximately 84 km off the Angus coast having average water depths of 72m.

It is one of the largest lease areas by Crown Estate Scotland to any bidder in the ScotWind leasing allocation round with 858 Km sq. The offshore project estimated with USD 5400 million project value will reduce carbon emissions by 7.5 million tonnes every year. The project is currently in the permitting phase.

The Offshore Environmental Impact Assessment (EIA) for the Ossian Offshore Wind farm array is conducted by Consulting and engineering services provider RPS. HiDef Aerial Surveying is in charge of digital aerial surveys across the Ossian array and Fugro and Ocean Infinity conducted geotechnical investigations in March 2023.

In January 2025, XOCEAN completed a 13-month geophysical survey along the 420 km cable route for the Ossian floating offshore wind farm. Using uncrewed survey vessels, the survey covered depths from the shoreline to over 100 meters. The data will aid in identifying suitable offshore export cable routes for engineering and environmental assessments.

Currently, a month-long benthic survey gathered data from 122 sites along the export cable route for the Ossian floating offshore wind farm. Earlier in May, a two-year wind data collection campaign for the project was also completed.

East Anglia Hub Offshore Wind Complex

East Anglia Hub is the UK's major step towards clean energy, with four developments in the East Anglia area. The project covers the southern area of the North Sea: East Anglia ONE, East Anglia ONE North, East Anglia TWO, and East Anglia THREE with a combined capacity of 3,100 MW. The whole project is estimated to cost USD 6500 million and support the clean energy needs of 2.7 million British homes.

East Anglia ONE

East Anglia ONE is situated 43 km off the Suffolk coast and is developed by ScottishPower Renewables and Macquarie’s Green Investment Group. This offshore wind farm features 102 Siemens Gamesa renewable energy offshore wind turbines, each producing 7 MW, with a total capacity of 714 MW. 84 Km long transmission cables connecting to the national grid ensure the power supply and it has 30+ working years.

East Anglia TWO

East Anglia TWO is the second development in the southern North Sea. The offshore wind farm has an operational capacity of around 900MW and powers approximately 800,000 UK households. This offshore development includes up to 75 wind turbines and consists of four electrical platforms connected by platform link cables to collect electricity.

Currently, Iberdrola is planning to seek a partner to sell a 49% stake in its EUR 5 billion East Anglia Two offshore wind farms. ScottishPower has awarded Siemens Gamesa a turbine supply contract worth over EUR 1 billion for the East Anglia Two offshore wind farm. The deal includes 64 of Siemens Gamesa’s SG 14-236 DD turbines.

East Anglia THREE

East Anglia THREE is developed by ScottishPower Renewables, with construction commenced in 2022. Further additions are done to increase the capacity to 1,400MW. The project, situated approximately 69 km from the Suffolk coast, includes up to 100 offshore wind turbines, along with one offshore converter station and up to four subsea export cables. Onshore construction began in July 2022, involving an onshore cable route to transport energy to a converter station in Bradford.

East Anglia ONE North wind farm project is located approximately 37.7km from the Suffolk coast, near Lowestoft. The project comprises up to 67 wind turbines covering an area of 208 square kilometres. The offshore development also includes up to four electrical platforms linked by cables for electricity collection, along with inter-array and export cables to transport electricity to shore.

In April 2025, ScottishPower began offshore construction of the East Anglia Three wind farm with the installation of its first monopile foundation (an 83.9-metre, 1,800-tonne structure), the largest ever installed from a jack-up vessel in Europe. A total of 95 monopiles will be installed, each supporting one of Siemens Gamesa’s 14.75 MW turbines.

Masdar and Iberdrola have achieved financial close for the East Anglia Three offshore wind farm, securing EUR 3.6 billion in project financing from 23 banks and the Danish Export Credit Agency (EIFO) which is valued at around EUR 5.2 billion.

MarramWind Floating Wind Farm

The MarramWind project is one of the largest floating offshore wind projects in UK. The collaborative venture between ScottishPower and Shell is located 75 kilometers off the northeast coast of Scotland. This proposed floating wind farm is set to deliver up to 3 gigawatts (GW) of renewable energy, enough to power more than 3.5 million homes.

Public engagement has been central to the planning of MarramWind, with nearly 300 participants across Aberdeenshire taking part in the project's consultation phase, which concluded in December 2024. The second consultation round included both in-person and virtual sessions, ensuring community voices were heard.

As part of the broader expansion of wind farm UK initiatives, MarramWind builds on decades of offshore experience from both partners and contributes to the growing list of large-scale offshore windfarms UK is currently developing. Following its success in the ScotWind Leasing round by Crown Estate Scotland, MarramWind could become a global benchmark for floating wind technology.

Morven Offshore wind farm

The Morven Offshore Wind Farm, a collaboration between bp and EnBW, aims to generate up to 2.9GW of renewable energy from Scottish waters. The project spans an area of around 860 km and situated approximately 60 kilometers off the coast of Aberdeen with turbines installed at water depths between 64 and 76 meters.

Morven, among the most ambitious projects in the growing wind farm UK sector, has capacity to power approximately 3 million homes. The project includes an offshore wind farm array with turbines, substation platforms, and inter-array cabling entirely within Scottish waters.

The project infrastructure includes the Morven – Hawthorn Pit Grid Connection and the newly identified Branxton Area Grid Connection. These elements require subsea and underground cables as well as a land substation, with ongoing consultation to gather public input.

As one of the most significant UK new wind farms in development, Morven has already completed its initial non-statutory consultation and will continue to engage local communities and authorities as plans progress.

Currently, a public consultation has opened for the proposed grid connection of the Morven Offshore Wind Farm to the national grid at the Hawthorn Pit substation near Seaham. Running from 22 October to 30 November 2025, the consultation invites feedback from local residents and stakeholders on the Morven Hawthorn Pit Grid Connection Project.

Hornsea 3 Offshore Wind Power Plant

The Hornsea 3 offshore windfarm, a flagship project by Orsted (previously DONG energy) is set to revolutionise renewable energy in the UK, having five times the capacity of the London Array, commissioned in 2013. 

Located approximately 120 km off the Norfolk coast and 160 km off the Yorkshire coast, Hornsea project will cover a vast 696 square kilometre area in the southern North Sea. The project with an estimated cost of USD 9600 million will feature DD offshore wind turbines, each having capacity of 14 MW.

The Hornsea project is expected to generate 2900 MW of clean energy and is estimated to power over 3.3 million homes across the UK. Hornsea 3 deployed innovative HVDC technology which is connected with four HVDC converter stations facilitating seamless power transmission between the wind turbines and the national grid.

The offshore wind development of the project started with the submission of a Development Consent Order (DCO) application in May 2018. The project received official consent from the Department for Business, Energy, and Industrial Strategy in December 2020. The permission was granted and final investment was made by Orsted for the largest offshore wind farm in December 2023.

The project is a collaboration with industry leaders like Jan De Nul Group, Havfram Wind, Haizea Wind Group, SeAH Wind, Hitachi Energy, Aibel, NKT, VolkerWessels, Hellenic Cables, and Prysmian Group. They will contribute to various aspects of the project, from cable installation to turbine fabrication.

In October 2025, Aibel completed the second offshore converter station topside for Ørsted’s 2.9GW Hornsea 3 offshore wind project at its yard in Thailand. The substation, named Hornsea 3 Link 2, has now begun its journey to Europe. Under a 2022 contract with Ørsted, Aibel and Hitachi Energy are delivering two HVDC offshore converter stations, with Aibel handling engineering, procurement, construction, and installation, based on Hitachi Energy’s modular HVDC system.

Currently, Ørsted is reportedly in discussions with US-based private equity firm Apollo to sell a stake in its 2.9GW Hornsea 3 offshore wind project in the UK, according to media reports.

West of Orkney Offshore Wind Power Plant

West of Orkney offshore wind farm is located in the North Sea, UK with a capacity of 2,000 MW. The project is currently in the permitting phase which is likely to commence operation in 2025 and commercial operation in 2029. Green Investment Group, Corio Generation, TotalEnergies, and Renewable Infrastructure Development Group are invested in the project.

The estimated cost of the project is USD 5470 million and it supplies clean energy to power 2 million households. The offshore wind farm consists of 125 turbines and over an area of 657 Km sq. The operation of the West of Okerney offshore wind is in the N1 area which the Scottish Government considered suitable for the development of commercial-scale offshore wind farms.

Option Agreement was secured in January 2022 for ScotWind leasing process and National Grid connection agreement for Caithness. The project is waiting for the approval of offshore consent applications to Scottish Ministers.

Currently, developers have secured both offshore and onshore planning consent in June 2025. Final approval now depends on securing a leasing agreement from Crown Estate Scotland.

Future of Offshore Wind Farms in UK - 2025

The United Kingdom is set to become the global leader in offshore wind energy, to quadruple its capacity by 2030, leveraging the potential of areas like the Irish Sea, Celtic sea and UK waters alongside established projects in other regions. 

This ambitious target is driven by a dual purpose: combating climate change and propelling economic growth. To achieve this, the Rishi Sunak led UK government has outlined a comprehensive offshore wind industrial strategy that hinges on a strong partnership with the industry itself.

The United Kingdom's quest for renewable energy started in the 1980s with the Non-Fossil Fuel Obligation (NFFO) which resulted in the UK's first offshore wind farm, Blyth Offshore and Gunfleet Sands. From then, the potential of the UK’s wind energy is harnessed to make it the second largest offshore wind energy in the world next to China.

The UK government's policies to increase the production of offshore wind capacity to 50 GW by 2030 and net zero greenhouse gas emissions by 2050 give the market a new boost. Geographically, the UK has a high potential for offshore wind harvesting with long coastal lines, shallow water, and the North Sea with the world's best wind resource.

In the 2010s, a fall in the construction cost of offshore wind farms and new policies strengthened the supply chain. Result? An additional 30 more offshore wind farms and related power projects were announced in recent years with Dogger Bank wind farm being the largest offshore power project in the world. Also, Hywind Scotland became the world's first floating offshore wind farm.

UK Government Backed Incentives

The government offers market-based incentives to make offshore wind farms more commercially attractive, the collaboration extends to streamlining deployment processes and reducing costs. This collaborative approach fosters a win-win scenario where the industry thrives, creating jobs and economic opportunities, while the UK steadily progresses towards its clean energy goals.

The Contracts for Difference (CfD) scheme provides financial certainty for developers by guaranteeing a minimum price for the electricity produced by their offshore wind farms. This helps to mitigate investment risks and encourages companies to enter the market.

Additionally, the strategy emphasises investment in port infrastructure and the domestic supply chain. Upgrading ports to accommodate the massive wind turbine components and fostering a robust domestic supply chain will not only improve efficiency but also create jobs and economic growth opportunities within the UK itself.

The highly ambitious project had a downfall in 2021 with mistakes in policymaking which resulted in zero bidders in the fifth round of auction. It was rectified in 2024 with Orsted taking over the world’s largest offshore wind project Hornsea 3 which will be commissioned in 2027.

Let’s have a look into other top offshore wind farm power projects:

1. Mooir Vannin Offshore Wind Power Plant

2. Beatrice Offshore Wind Farm

3. Arven Floating Offshore Wind Power Plant

Conclusion

The United Kingdom is making waves in the offshore wind market and renewable energy goals. The country’s aim to increase the offshore wind energy capacity to 50 GW by 2030 and achieve net zero greenhouse gas emissions by 2050 is on the right track with the upcoming projects.

Major projects like Hornsea 3, East Anglia Hub, Berwick Bank, West of Orkney, and Ossian can power millions of homes and contribute significantly to reducing carbon emissions. Collaboration with industry leaders and meticulous planning like strengthening the supply chain and creating job opportunities are key aspects of these upcoming offshore wind farm projects.

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