Hornsea 3 offshore wind farm from Ørsted A/ S - 2.9 GW project reshapes UK power mix

Reviewed: ad hoc news B2B & Pro desk. Edited and checked on 2026-06-27, 17:05. Details in the imprint.

Hornsea 3 offshore wind farm from Ørsted A/S feels more like a slowly assembling steel forest than a power plant, with foundations and towers rising one by one from the grey North Sea. On a survey vessel deck, project director Duncan Clark squints into the spray as another installation ship lines up its next turbine position.

Where Hornsea 3 sits in Ørsted’s lineup

Hornsea 3 is the third large-scale project in Ørsted’s Hornsea zone, following Hornsea 1 and Hornsea 2, and is planned at around 2.9 gigawatts of capacity once fully built. This pushes the overall Hornsea cluster well beyond 5 GW, cementing Ørsted as a central player in UK offshore wind.

The project lies off the UK’s east coast in the North Sea, with cables running back to onshore substations that feed into the British transmission grid. It targets long-term power supply backed by UK Contracts for Difference, giving Ørsted revenue visibility over decades.

What the project delivers

Once operational, Hornsea 3’s roughly 2.9 GW is expected to supply low-carbon electricity to millions of UK homes, with Ørsted previously framing the Hornsea zone as a cornerstone of Britain’s decarbonisation path. Turbine ratings in the zone have moved into the double-digit megawatt range, reflecting industry’s step-up in scale.

Compared with earlier offshore projects, Hornsea 3 pushes further out in capacity and uses a denser array design, aiming to maximise energy yield from a given sea area. That makes each maintenance trip count, with crews hearing only a quiet mechanical hum from nacelles as hundreds of megawatts flow silently down subsea cables.

How Hornsea 3 differs from earlier Hornsea phases

Hornsea 1 and Hornsea 2 were already among the largest operational offshore wind farms worldwide, but Hornsea 3 extends the zone with more powerful turbines and updated grid connection arrangements. The project has passed UK planning hurdles and secured CfD support, giving Ørsted confidence to commit capital.

Regulatory documents outline layout revisions over time as turbine technology evolved, with Ørsted adjusting the final design to match newer turbine platforms while staying within consent limits. That iterative planning process is typical for large offshore projects that span several years between concept and construction.

Where it still faces challenges

Ørsted has highlighted cost pressures and supply-chain constraints across its offshore portfolio, and Hornsea 3 is not immune. Rising input costs for steel, cables and installation vessels can narrow project margins, even with long-term contracts in place.

Grid integration and environmental mitigation remain work-intensive, from seabird and marine mammal monitoring to negotiations over cable landfalls. Duncan Clark and his team spend as much time in meeting rooms and on modelling tools as they do offshore, balancing stakeholder expectations with engineering realities.

Company context and share reference

Ørsted A/S has grown from a largely fossil-focused Danish utility into a renewables-heavy group with offshore wind at its core, and the Hornsea projects showcase that shift. The company’s shares are listed on Nasdaq Copenhagen and remain closely watched by international investors.

On 2026-06-27, Ørsted A/S shares (ISIN DK0061539921) trade on Nasdaq Copenhagen in Danish kroner, with the Hornsea 3 build-out seen as one of the long-term drivers of the Ørsted A/S share price.

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