In international media [1], [2], [3], it was announced at the end of January that the North Sea countries will once again make substantial investments in the development of offshore wind farms in the North Sea. Belgium, Denmark, Germany, France, Ireland, Luxembourg, the Netherlands, Norway and the United Kingdom, together with private companies, plan to invest approximately one trillion euros in offshore wind energy projects.
This announcement was made during the third North Sea Summit in Hamburg, Germany. Through these investments, the participating countries aim to generate up to eight times more electricity from wind energy by 2050. The objective is to reduce dependence on external energy-exporting countries and to decrease carbon emissions from electricity generation. The question now arises as to whether this offshore wind ambition can be regarded as a responsible investment, both economically and socially.
The renewed focus on offshore wind energy fits within a broader European policy framework [4] aimed at achieving climate neutrality by 2050, strengthening energy security, and enhancing strategic autonomy. Following the energy crisis of recent years, the importance of a stable, affordable, and geopolitically less vulnerable energy supply has become more prominent on the policy agenda. In this context, the North Sea is increasingly regarded as a central energy hub for North-West Europe. Within this policy framework, offshore wind energy is positioned as a key technology that contributes both to the reduction of greenhouse gas emissions and to decreasing dependence on imported fossil fuels.
Against this background, offshore wind energy is selected in part because of its spatial and societal advantages. In contrast to onshore renewable energy production, offshore wind does not create direct competition with other forms of land use, such as housing, agriculture, or nature conservation. As a result, existing spatial functions are largely preserved, which enhances the political and societal feasibility of large-scale deployment [5].
In addition, the offshore location results in a more limited audiovisual impact on the landscape for the general population [5]. Offshore wind turbines are perceived by the majority of the population as less intrusive than installations on land. This generally translates into reduced local opposition and fewer legal challenges to permitting decisions, thereby contributing to a smoother and faster implementation of projects. The opposite is often observed for onshore wind energy, where visual impact and noise nuisance frequently give rise to societal controversy and prolonged permitting procedures. In Flanders, this is reflected in the limited growth of the onshore wind fleet: in 2025, only thirteen new onshore wind turbines were commissioned, indicating the significant barriers facing further expansion [6].
In addition to these spatial and societal aspects, offshore wind energy also offers clear technical advantages. Due to higher and more consistent wind speeds at sea, the capacity factor of offshore wind turbines is significantly higher than that of onshore wind turbines, resulting in a more stable electricity output throughout the year. An additional advantage is that offshore wind energy production is relatively high during the winter months, when electricity demand peaks and solar energy yields remain limited [7]. In this respect, offshore wind energy aligns well with the seasonal consumption profile and functions as a complementary technology within a broader renewable energy mix.
Despite its clear advantages, offshore wind energy also entails significant disadvantages, particularly in terms of costs and operational complexity. The construction of offshore wind farms requires substantial investment due to complex logistics, larger foundation structures, and the need for connection to the offshore electricity grid. These factors result in higher upfront capital costs compared to onshore wind energy. In addition, the marine environment and exposure to corrosion impose more stringent requirements on maintenance and repairs, increasing operational costs and limiting the accessibility of installations [5].
From an economic and societal perspective, offshore wind energy can be regarded as a strategic investment with clear long-term benefits. The technology enables large-scale generation of renewable electricity without direct greenhouse gas emissions and contributes to reducing dependence on imported fossil energy sources. Furthermore, the limited use of land and the relatively high level of public acceptance enhance its societal feasibility compared with alternative renewable options. These advantages are counterbalanced by substantial upfront investment costs, increased maintenance complexity, and the need for extensive offshore grid infrastructure, meaning that economic viability remains strongly dependent on policy choices, technological progress, and market developments.
In this context, offshore wind energy can be viewed as a necessary but, in isolation, insufficient pillar of the future energy system. While the technology can make a significant contribution to climate objectives and energy security, additional generation capacity is required to compensate for the variability of wind power and to ensure a continuous electricity supply. Offshore wind therefore occupies a central yet complementary position within a diversified energy mix, in which other renewable sources, flexibility options, and potentially dispatchable technologies also play a role. As part of an integrated and long-term-oriented energy strategy, offshore wind energy can thus be considered a forward-looking and socially justifiable investment, provided it is embedded within a broader system of energy production, storage, and grid management.