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    Careers in Engineering, Professional Services & the…

    Shape a better future for us all and a brighter future for you. With us, you can.

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Bnr-Web-Deskop-Swenden-Poseidon-Hero

Clean Energy for a Million Households

The Poseidon offshore wind farm is part of a larger push to have 100% renewable electricity production by 2040 in Sweden.

Bnr-Web-Deskop-Swenden-Poseidon-Hero

Clean Energy for a Million Households

The Poseidon offshore wind farm is part of a larger push to have 100% renewable electricity production by 2040 in Sweden.

  1. We are WSP
  2. What we do
  3. Projects
  4. Poseidon Offshore Wind Farm

Vattenfall and Zephyr, two Nordic leaders in renewable energy, are planning an offshore wind farm on the west coast of Sweden, in the southern Skagerrak/northern Kattegat region about 40 km northwest of Gothenburg.

They are applying for a permit for the Poseidon offshore wind farm. According to estimates, the proposed wind farm will have a maximum of 94 turbines with floating foundations, possibly the first in Sweden. The project will generate approximately 5.5 TWh of electricity per year, or nearly 4% of Sweden's electricity consumption, supplying about 1 million households.

As part of the permitting process, WSP is responsible for preparing the environmental impact assessment and supporting studies for the establishment of the wind farm under Sweden’s Economic Zone Act (SEZ) and the internal cable network under the Continental Shelf Act (KSL) as well as supporting the client during all stages of the permitting processes.

Our assignment includes providing strategic support to Zephyr and Vattenfall. WSP will continue to support the client in the next phases of the project.

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Location

  • Kattegatt, Sweden

Client

  • KonTiki Vind AB

Project Status

  • Ongoing

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Achieved milestones

In December 2022, an application for a wind farm permit under the SEZ and KSL Acts was submitted to the Swedish government. WSP was responsible for preparing the environmental impact assessment for both application processes and is continuing to give strategic support to the client during all stages of the permitting process.

Read more about the project

Zephyr AB Vattenfall

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Explore our sectors

Offshore Wind 563 x 220

Offshore Wind

Helping the industry to build offshore wind in a more ethical and sustainable way using innovative techniques.

Explore our services

  • Maritime Environmental
  • Environmental Management and Assessment
  • Power transmission and distribution
  • Biodiversity & Natural Capital

Other challenges that we have overcome

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The Median Backbone: Connecting nations, powering lives

1,600 km of cross-border transmission lines supporting reliable electricity exchange across West Africa.

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United States

Environmental Impact is Part of Transmission Line Study

Various public and private utilities have been proposing high-voltage transmission improvements, including the regional system provider in the US Pacific Northwest, the Bonneville Power Administration (BPA).

SBTs for Nature Musholm AS  -Thumbnail
Denmark

SBTs for Nature Musholm AS

WSP is working with pioneering organizations who have validated science-based targets in place and are now ready to put them into action, embedding nature into business strategy, risk management and operational decision-making. The approach is designed to help firms translate nature ambition into measurable action across the seafood sector and beyond.

thn-kruunuvuorensilta-jarno haanpuro
Helsinki, Finland

Kruunuvuori Bridge

Helsinki’s Kruunuvuori Bridge, designed by WSP in Finland, is one of the world’s longest bridges solely for public transport, pedestrians and cyclists.

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Oxford, UK

Ellison Institute of Technology Oxford

Charting a new course from scientific discovery to real-life impact.

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Uganda

Shaping Uganda’s energy future through regulatory reform and power market design

Ricardo supported the Electricity Regulatory Authority of Uganda during the transition of electricity distribution operations back to state ownership in March 2025. Funded by the Norwegian Water Resources and Energy Directorate, the work focused on developing a new economic regulatory framework, updating electricity tariffs, and designing power trading mechanisms to protect efficiency gains and improve affordability.

thn-website-Port-Lands-Flood-Protection
Ontario, Canada

Port Lands Flood Protection

The Port Lands Flood Protection project has re-naturalized the Don Valley River to safeguard Downtown Toronto from increasing risks of flood, help spur economic growth and strengthen biodiversity.

HyNetNorthWest_HydrogenPipeline_Thumbnail_563  220 px
United Kingdom

HyNet North West Hydrogen Pipeline: Leading the UK's net zero journey with hydrogen

Pre-feasibility design work and planning work for a pioneering hydrogen project that will put the UK at the forefront of net zero innovation. At WSP, we’ve advised gas distribution company Cadent as they lead this energy transition project through its lifecycle and to provide a new way to power the UK’s industry and communities. 

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Apalachicola Bay, Florida, USA

Franklin-98 Living Shorelines

Using nature-based solutions and habitat restoration to build coastal resilience and protects critical infrastructure.

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Nairobi, Kenya

Protecting Kenya’s wildlife while helping build a vital highway

Highways are essential for prosperity – and they can also be a threat to wildlife. Here are some ideas of how these two priorities can be met, on a highway across Kenya. 

Mine environmental, Natura assessment, sustainable mining, multidisciplinary
Lapland, Finland

Natura assessment of the Sakatti mining project

Our experts prepared a Natura 2000 assessment for a sensitive area. Read how our multidisciplinary team produced an expert report that was praised by the authorities and serves as the basis for sustainable planning of the area.

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Parainen

Kirjalansalmi Bridge: Finland’s Largest Span

WSP has prepared the general and construction plans for the Kirjalansalmi Bridge as well as the road plans for the Kirjalansalmi and Hessundinsalmi bridges. The two new bridges replace aging infrastructure and provide smooth and safe traffic flow.

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