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Hesselø Offshore Wind Farm

Welcome to Grenaa Port's neighbor in the Kattegat

Vattenfall

DESIGNATED WINNER

0.8–1.2 GW

PLANNED CAPACITY

15-22 MW

MILL SIZE

2032

EXPECTED ELECTRICITY GENERATION

165.55 km2

AREA

20-45 m

WATER DEPTH

Vattenfall

DESIGNATED WINNER

0.8–1.2 GW

PLANNED CAPACITY

15-22 MW

MILL SIZE

2032

EXPECTED ELECTRICITY GENERATION

165.55 km2

AREA

20-45 m

WATER DEPTH
An important milestone

Vattenfall is to build Hesselø

An important milestone

Vattenfall to Build Hesselø

Vattenfall Vindkraft A/S has been selected as the winner of the tender for the Hesselø Offshore Wind Farm in the Kattegat, north of Zealand.

The park is planned to have a capacity of between 0.8 and 1.2 GW. It is scheduled to begin generating electricity in 2032 and is expected to be fully operational by the end of that year.

The Port of Grenaa congratulates Vattenfall on being awarded the contract and hopes that the project will serve as the foundation for a close and value-creating partnership.

Vattenfall Vindkraft A/S has been selected as the winner of the bid for the Hesselø Offshore Wind Farm in the Kattegat, north of Zealand.

The park is planned to have a capacity of between 0.8 and 1.2 GW. It is scheduled to begin generating electricity in 2032 and is expected to be fully operational by the end of that year.

The Port of Grenaa congratulates Vattenfall on the award and hopes that the project will serve as the foundation for a close and value-creating collaboration.

Hesselø Timeline

From Preliminary Studies to Green Electricity

Hesselø Timeline

From Preliminary Studies to Sustainable Electricity

The Project
Hesselø Offshore Wind Farm

The Hesselø Offshore Wind Farm is to be built in the Kattegat, north of Zealand, and will have a capacity of between 0.8 and 1.2 GW. Vattenfall has been selected as the winning bidder and will be responsible for the development, construction, and operation of the wind farm. The offshore wind farm is scheduled to begin generating electricity in 2032 and is expected to be fully operational by the end of that year.

With its strategic location in the Kattegat, specialized facilities, and experience gained from projects such as the Anholt Offshore Wind Farm, the Port of Grenaa is ready to engage in dialogue with Vattenfall, suppliers, and other stakeholders regarding a potential partnership.

Tenders
Vattenfall has been named the winner

The new call for bids was published on November 20, 2025, with a deadline for bids of May 20, 2026. The Danish Energy Agency received five bids.

On August 4, 2026, Vattenfall was selected as the winning bidder with a price of 542 DKK per MWh. The next step is to sign the contract once the final review of the documentation and the legal formalities related to the tender have been completed.

Feasibility studies
The Basis for the Specific Project

In 2023–2024, Energinet conducted preliminary studies for the Hesselø Offshore Wind Farm.

The studies cover, among other things, the seabed, wind conditions, and the environment in the planning area, as well as potential cable corridors at sea and on land. The results reduce project risk and serve as the basis for Vattenfall’s further project planning and environmental impact assessment.

Environmental assessments
From a general plan to a specific project

The Hesselø plan underwent an environmental assessment and was approved by the Danish Energy Agency on June 26, 2024. The plan was updated on November 18, 2025.

In addition, the specific project must undergo an environmental impact assessment of both the offshore facilities and the relevant onshore facilities. Vattenfall will prepare the assessment, and the public will be consulted through new public hearings.

Facilities
An offshore wind farm with a capacity of 0.8–1.2 GW

The Hesselø Offshore Wind Farm is to be built in the Kattegat, north of Zealand, and will have a capacity of between 0.8 and 1.2 GW, depending on Vattenfall’s final project plan.

The plan includes offshore wind turbines, one or more offshore transformer platforms, and subsea cables, as well as cables, high-voltage facilities, and any necessary grid reinforcements onshore. The specific design, including the size and number of turbines, will be determined through Vattenfall’s further project planning and regulatory review.

How to connect
The electricity is fed into the Danish power grid

Hesselø is scheduled to be connected to the grid at the Hovegård High-Voltage Substation.

The connection includes subsea cables from the offshore wind farm, onshore cables and high-voltage facilities, as well as any necessary upgrades to the power grid. The final solution will be determined during the further design phase and regulatory review.

Timetable
From a New Location to Green Energy
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The project
Hesselø Offshore Wind Farm

The Hesselø Offshore Wind Farm will be built in the Kattegat, north of Zealand, and will have a capacity of between 0.8 and 1.2 GW. Vattenfall has been selected as the winner of the tender and will be responsible for the development, construction, and operation of the wind farm. The offshore wind farm is scheduled to begin generating electricity in 2032 and is expected to be fully commissioned by the end of that year.

With its strategic location in the Kattegat, specialized facilities, and experience gained from, among other things, the Anholt Offshore Wind Farm, the Port of Grenaa is ready to engage in dialogue with Vattenfall, suppliers, and other stakeholders regarding potential collaboration.

Tenders
Vattenfall is named the winner

The new tender was published on November 20, 2025, with a bid deadline of May 20, 2026. The Danish Energy Agency received five bids.

On August 4, 2026, Vattenfall was named the winner with a bid of DKK 542 per MWh. The next step is the signing of the contract, once the final review of the documentation and the tender formalities have been completed.

Preparatory Studies
The basis for the specific project

Energinet conducted feasibility studies for the Hesselø Offshore Wind Farm in 2023–2024.

The studies include, among other things, the seabed, wind conditions, and the environment in the planning area, as well as possible cable corridors at sea and on land. The results reduce project risk and form the basis for Vattenfall’s further design and environmental impact assessment.

Environmental Assessments
From an overall plan to a specific project

The plan for Hesselø underwent an environmental assessment and was approved by the Danish Energy Agency on June 26, 2024. The plan was updated on November 18, 2025.

The specific project will also undergo an environmental impact assessment of both the offshore facilities and the relevant onshore facilities. Vattenfall will prepare the assessment, and the public will be involved through new consultations.

Facilities
An offshore wind farm with a capacity of 0.8–1.2 GW

The Hesselø Offshore Wind Farm will be built in the Kattegat, north of Zealand, and will have a capacity of between 0.8 and 1.2 GW, depending on Vattenfall’s final project.

The plan includes offshore wind turbines, one or more offshore transformer platforms, and submarine cables, as well as cables, high-voltage installations, and any grid reinforcements on land. The specific design, including the size and number of turbines, will be determined through Vattenfall’s further design and regulatory approval process.

Connection
The electricity is fed into the Danish power grid

Hesselø is scheduled to be connected to the grid at the Hovegård High-Voltage Substation.

The connection includes submarine cables from the offshore wind farm, cables and high-voltage installations on land, as well as any necessary upgrades to the power grid. The final solution will be determined during the further design and regulatory approval process.

Timetable (Danish)
From a New Location to Green Energy
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Ready for dialogue and cooperation

Facilities and expertise throughout the project's lifecycle

The Port of Grenaa is closely monitoring the project's progress and stands ready to engage in dialogue with Vattenfall, suppliers, and other partners.

With our strategic location in the Kattegat, our experience from projects such as the Anholt Offshore Wind Farm, and our specialized facilities, we can support the project from installation and project logistics through to operation and maintenance.

Ready for dialogue and cooperation

Facilities and capabilities for the entire project life cycle

The Port of Grenaa is closely monitoring the project’s progress and is ready to engage in dialogue with Vattenfall, suppliers, and other partners.

With our strategic location in the Kattegat, our experience from projects such as the Anholt Offshore Wind Farm, and our specialized facilities, we can support the project from installation and project logistics through to operation and maintenance.

01 Project Areas

Large, flexible spaces for pre-assembly,
storage, and efficient project logistics

02 Strong Quays

Quay areas with high load-bearing capacity for large and heavy
offshore wind components.

03 Jack-up

Reinforced harbor bottom and good navigation conditions for installation vessels.

04 O&M Base

Warehouse, service, office, and crew facilities located close to the dock.

05 Green Energy

Green shore power and modern utility infrastructure for maritime operations.

06 24-Hour Service

An experienced local network of suppliers and access to 24/7 service.

01 Project Areas

Large and flexible areas for pre-assembly,
storage, and efficient project logistics

02 Strong Quays

Quay areas with high load-bearing capacity for large and heavy offshore wind components.

03 Jack-up

Reinforced harbor bottom and favorable navigation conditions for installation vessels.

04 O&M Base

Warehouse, service, office, and crew facilities located near the quay.

05 Sustainable Energy

Green shore power and modern supply infrastructure for maritime operations.

06 24-hour service

An experienced network of local suppliers and access to round-the-clock service.

Want to know more?

Have a chat with Theis Gisselbæk

Theis Gisselbæk
CCO, Port of Grenaa