Two decades after delivering its first offshore wind project, SSE Renewables now has more than 9 GW of secured offshore wind capacity in the UK and Ireland. Since the 25 MW Arklow Bank project launched in the Irish Sea, SSE has helped deliver over 2.5 GW of installed offshore wind capacity, including some of the most technically advanced projects operating today.

That momentum is now focused on a new generation of large-scale developments. SSE’s top 5 largest global upcoming offshore wind farm portfolio includes Berwick Bank Wind Farm, Dogger Bank A, B, and C, Ossian Floating Offshore Wind, Celtic Sea Array, and Arklow Bank Phase 2. Together, these projects span fixed-bottom and floating offshore wind, extending across UK and Irish waters.

This article explores the top five largest upcoming wind farm projects being developed by SSE Renewables, highlighting their scale, locations, development status, and strategic importance to the UK and Ireland’s renewable energy targets.

List of Top 5 Largest Upcoming Wind Farm Projects by SSE 2026

Berwick Bank Wind Farm

The Berwick Bank Wind Farm is SSE Renewables’ largest upcoming offshore wind project. Located in the North Sea within the outer Firth of Forth, off the coast of East Lothian, the project has a planned installed capacity of up to 4.1 GW, positioning it as one of the largest offshore wind farm projects under construction in the world.

At full capacity, Berwick Bank is expected to generate enough clean electricity to power more than six million homes, equivalent to supplying every household in Scotland twice over. The project could avoid around eight million tonnes of carbon dioxide emissions each year, comparable to removing all of Scotland’s annual car emissions. Once operational, it could increase Scotland’s total renewable energy capacity by nearly 30%.

The project reached a major milestone in summer 2025, when the Scottish Government approved its Section 36 planning application, clearing the way for construction to proceed. Berwick Bank has secured two grid connection points, one in East Lothian and another in the Blyth area of Northumberland.

Dogger Bank (A/B/C)

The Dogger Bank Wind Farm is one of the world’s largest offshore wind developments and a cornerstone project in SSE’s offshore wind portfolio. Located in the North Sea, the project sits between 130 km and 190 km off the North East coast of England and is being developed in three phases: Dogger Bank A, Dogger Bank B, and Dogger Bank C.

Each phase has an installed capacity of 1.2 GW, giving the project a combined capacity of 3.6 GW. Once fully operational, Dogger Bank will be capable of generating enough renewable electricity to power around six million homes annually, making it the largest single source of renewable energy in the UK. 

The wind farm will deploy GE’s Haliade-X turbines, among the most powerful offshore wind turbines in the world, where a single rotor rotation can supply a UK household with electricity for up to two days.

Dogger Bank is being delivered through a joint venture between SSE (40%), Equinor (40%), and Vårgrønn (20%). SSE is leading the development and construction of the project, while Equinor will operate the wind farm over its expected 35-year operational life. 

The project received consent as a Nationally Significant Infrastructure Project in 2015 and secured 15-year Contracts for Difference (CfDs) for the full 3.6 GW capacity in the UK Government’s 2019 low-carbon power auction.

Ossian Floating Offshore Wind

The Ossian Offshore Wind Farm is one of the largest upcoming floating wind projects being developed through a joint venture between SSE Renewables (40%), Marubeni Corporation (30%), and Copenhagen Infrastructure Partners (CIP) (30%), with a potential installed capacity of up to 3.6 GW.

Located approximately 84 km off the east coast of Scotland in the Firth of Forth, the project covers an expansive 858 square kilometres of seabed, making it one of the largest lease areas awarded by Crown Estate Scotland under the ScotWind leasing round.

Once operational, Ossian could generate enough clean electricity to power up to six million homes and offset an estimated 7.5 million tonnes of carbon emissions annually. Power generated by the project will be delivered to Great Britain through grid connections in Angus, Scotland, and Lincolnshire.

As of July 2025, the project has moved into active development. Specialist contractors have completed benthic surveys covering more than 420 kilometres of seabed.

Celtic Sea Offshore Wind Farm

The Celtic Sea Offshore Wind Farm is one of the largest offshore wind farms in Ireland being developed and wholly owned by SSE Renewables. Planned in the Irish Sea off the coast of Leinster, Ireland, the project will have an installed capacity of 1.2 GW.

Once operational, Celtic sea offshore wind farm is expected to generate enough renewable electricity to power around 1.25 million households and businesses each year. It is also projected to offset approximately 1.2 million tonnes of CO₂ annually. The project will span 303 square kilometres and feature 50 fixed-foundation wind turbines, designed for high-output, utility-scale generation.

SSE Renewables plans to invest up to EUR 2.5 billion in the development of the Celtic Sea Array. Construction is expected to begin in 2027, with the project scheduled to enter commercial operation by 2030.

Arklow Bank Phase 2

Arklow Bank Wind Park 2 is SSE Renewables’ offshore wind project in Ireland and represents the next major phase of development at the historic Arklow Bank site, located off the coast of Arklow, County Wicklow. The project is planned to have a maximum export capacity of 800 MW.

The project builds on Arklow Bank Phase 1, Ireland’s first and only operational offshore wind farm, which was constructed in 2003-2004. Phase 1 consists of seven turbines with a combined capacity of 25.2 MW. Phase 2 will significantly scale up generation, with plans for between 47 and 56 offshore wind turbines, each comprising a foundation, tower, nacelle, and rotor assembly.

SSE Renewables is proposing a capital investment of up to EUR 2.5 billion to fully develop Arklow Bank Wind Park to its long-term potential. A key milestone was reached on June 6, 2024, when SSE submitted the offshore planning consent application to Ireland’s planning authority, An Bord Pleanála. This submission followed nearly seven years of development work and represents the final major consent required before the project can move into the construction phase.

Conclusion

SSE Renewables’ upcoming offshore wind projects reflect both scale and consistency. The company has built one of the strongest track records in the sector with more than 20 years of offshore wind delivery, 10 operating offshore wind farms, and seven more in development. It has secured an offshore pipeline of over 9 GW and positions itself as one of the largest offshore wind farm developers in the world.

Projects such as Berwick Bank and Dogger Bank push the limits of fixed-bottom offshore wind, while Ossian marks SSE’s first commercial-scale move into floating wind. Meanwhile, Celtic Sea Array and Arklow Bank Phase 2 show SSE’s long-term commitment to expanding offshore wind in Irish waters.

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