On December 18, 2025, the U.S. Department of the Interior (DOI) announced a suspension of leases for five offshore wind projects currently under development along the Atlantic coast. This decision, attributed to national security concerns raised in classified reports from the Department of Defense, affects projects including Vineyard Wind 1, Revolution Wind, Coastal Virginia Offshore Wind (CVOW), Sunrise Wind, and Empire Wind.

Secretary of the Interior Doug Burgum emphasized the need to address emerging risks associated with evolving adversary technologies, particularly in light of recent geopolitical tensions. The DOI expressed concerns that large wind turbines could interfere with radar systems, potentially obscuring legitimate targets or creating false alarms, which could complicate airspace security. Previous unclassified reports indicated that while adjustments to radar systems could mitigate some interference, they might also increase the risk of missing actual threats.

The announcement comes despite significant hardware already installed for these projects, with some nearing completion. For instance, the Empire Wind project, an 800 MW facility off New York, had previously faced a temporary halt due to claims of rushed permitting but resumed after lobbying efforts. Similarly, the Revolution Wind project was allowed to continue construction following a favorable court ruling.

Connecticut Governor Ned Lamont criticized the DOI's decision as erratic, warning that it could lead to increased electricity costs and disrupt economic stability in the region. He noted that the projects were expected to provide clean energy jobs and contribute to the state's energy needs. The pause has raised concerns among affected states, which were relying on the energy these facilities would provide, and legal options are being explored in response to the suspension.

The classification of the Department of Defense's analysis complicates the ability to contest this decision legally. Companies involved in these projects, such as Dominion Energy and Orsted, have invested significant resources and are eager to begin generating revenue from the power produced. The DOI's action has led to declines in stock prices for these companies, reflecting investor concerns over the future of offshore wind development in the U.S.

This pause follows a history of political opposition to offshore wind projects, including previous attempts by the Trump administration to halt new project permits. Advocates for renewable energy argue that such actions hinder progress in the sector, which is crucial for reducing dependence on fossil fuels and promoting environmental sustainability.