Norway is a latecomer to offshore wind energy (OWE) development but has set a high target to allocate 30GW of OWE by 2040. The objective of this case study is to understand how Norway incorporates biodiversity and environmental objectives into the planning processes toward OWE production. More specifically, the study focuses on the role of strategic impact assessments (SIAs) in aligning energy production with environmental and biodiversity goals, providing detailed insights into their strengths and weaknesses. It highlights the importance of assessments in the planning process, their contribution to policy coherence, and the challenges faced. The findings aim to inform best practices for integrating environmental considerations into marine planning and governance, ensuring sustainable and responsible OWE development.