Seagreen Offshore Wind Farm

Home » Seagreen Offshore Wind Farm

Seagreen Offshore Wind Farm


Seagreen Offshore Wind Farm, is located around 27km from the coast of Angus in the North Sea. The 1,075MW wind farm features 114 Vestas turbines and an offshore substation. First power was achieved in August 2022, with electricity transmitted via subsea cables to a point near Carnoustie and then to the Tealing substation via underground cables.

The wind farm provides enough green energy to power more than 1.6 million homes, equivalent to two-thirds of all Scottish homes and will displace over 2 million tonnes of carbon dioxide from electricity generated by fossil fuels every year. Seagreen became fully operational in October 2023.


Seagreen Project Book

Seagreen Project Book

  • Project Seagreen Offshore Wind Farm
  • Location Over 27km from Angus coast in the North sea
  • Project Type EPIC
  • Assets and Worksites The offshore installation activity utilised a wide range of vessels from Seaway7 fleet and 3rd party chartered vessels. The marine spread comprised heavy transport vessels, scour protection vessels, a crane vessel for foundation installation, cable-lay vessels including Seaway Aimery and Seaway Phoenix; and installation support vessels.
  • Date Awarded June 2020
  • Completion Date July 2023

Project at a glance

In 2020, Seaway7 was awarded the contract by SSE Renewables for the Engineering, Procurement, Construction and Installation (EPCI) of the 114 suction bucket foundations and inner-array cables for Seagreen Offshore Wind Farm, Scotland’s largest and world’s deepest offshore wind farm.

In August 2021, the first jacket foundations arrived on site at the Port of Nigg, shortly followed by the first foundation installation and commencement of the cable lay. In April 2023 the final foundations were installed, including a record-breaking foundation installed at over 58m depth. The final cable was laid on the project the following month and Seaway7 completed the full project scope in July 2023.


  • First of 114 jacket foundations delivered just one year on from contract signature.
  • First jacket superstructures arrived at the Port of Nigg – August 2021
  • First foundation installed – October 2021
  • World’s deepest offshore wind foundation installed at a depth of over 58m
  • Final jacket installed April 2023
  • Final cable laid in May 2023
  • Offshore scope completed July 2023

Technology and Innovation

  • Seaway7 implemented suction bucket foundation technology on jackets for this specific site to overcome the difficult and variable soil conditions, whilst gaining faster installation speed and avoidance of pile driving noise. This technology was the key contributer to the cost reduction on Seagreen.
  • The deepest locations across the Seagreen site feature some of the world’s tallest fixed-jacket foundations in offshore wind representing sizable challenges in fabrication, transportation and installation and requiring rigorous engineering and project management.

We are immensely proud to be playing a significant role in the construction of the momentous Seagreen offshore wind farm. This achievement is the culmination of more than three years of hard work since the contract award to Seaway7 in June 2020, and sets a new benchmark for jacket fabrication and transportation of this scale in the offshore wind industry.’

Lloyd Duthie
Vice President UK, Ireland and Asia
Let's get social

Connect with us and keep up to date with our latest news, projects, activities and stories.