Welcome to Llywelyn

floating offshore wind farm


Located in Welsh waters off the coast of Pembrokeshire, the proposed Llywelyn wind farm could provide up to 1.5GW of cleaner, renewable energy, the equivalent of powering up to 1.4 million homes.

Llywelyn wind farm, along with its sister project in Cornish waters, Petroc, will be among the first commercial-scale floating offshore wind projects in the UK.

Cutting-edge floating wind technology will enable Llywelyn to be located in deeper water, and further offshore, reducing environmental impacts whilst taking full advantage of stronger and more consistent winds.

Up to 1.5GW installed capacity

Up to 75 turbines

40 miles offshore

Up to 1.4M homes equivalent per year*

*The equivalent number of homes supplied is calculated by:
Wind farm installed capacity (in MW) multiplied by the number of hours in one year (8,760) multiplied by the average load factor for offshore wind (41.2%) (being the average load factor for offshore wind during 2019, 2020 and 2021 as published within the Digest of United Kingdom Energy Statistics, BEIS, 2022), divided by the average annual household energy consumption (3.831MWh) (being the average annual household energy consumption during 2019, 2020 and 2021 as published within Energy Consumption in the UK 2022, BEIS, 2022).

The Celtic Sea

With excellent wind resource, suitable water depth and a requirement for new electricity generation, the Celtic Sea is highly attractive to floating wind development. The region offers a unique opportunity to unlock new clean energy capacity and help establish a new industrial sector. To date, these waters have seen comparatively little offshore infrastructure deployment.

Llywelyn is one of two cutting-edge floating offshore wind projects developed by Renantis and BlueFloat Energy in the Celtic Sea. Together with Petroc, these projects could contribute up to 2GW of renewable energy capacity to South Wales and South West England, and go above and beyond the UK’s 1GW floating offshore wind target by 2030. You can read more about Petroc here.

Site location

Llywelyn wind farm is located in Welsh waters in the Celtic Sea, 40 miles off the coast of Pembrokeshire.

Llywelyn’s location has been selected following an extensive feasibility study and rigorous site assessment process. Our assessment has included reviews of protected areas, environmental impacts, cable routing, existing infrastructure, marine traffic, and fishing activity.

We have signed an agreement with National Grid, securing a 1GW grid connection in Pembrokeshire. The system operator is exploring upgrades to the existing site to facilitate the connection.  These developments will enable the Llywelyn offshore wind project to quickly enter the planning system.


Project timeline


  • Site selection
  • Wind resource assessments
  • Environmental constraints review


  • Feasibility studies
  • Grid connection agreements
  • Commence bird and mammal surveys


  • Crown Estate seabed leasing process
  • Industrial and supply chain planning
  • Project concept optimisation and scaling up from 300MW to 1GW


  • Environmental scoping
  • Commence technical surveys


  • Development of National Signficance (DNS) process: Examination by Planning and Environment Decisions Wales (PEDW) and decision by Welsh Government
  • Detailed project engineering (Front-End Engineering Design)


  • Contracts for Difference Allocation Round


  • Fabrication, assembly, installation and commissioning


  • Operational

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