This report provides a comprehensive update of the Life Cycle Inventories (LCIs) for electricity generation from wind power, focussing on the Swiss and European context. Commissioned by the Swiss Federal Office for the Environment (FOEN) and the Swiss Federal Office of Energy (SFOE) and conducted by the Zurich University of Applied Sciences (ZHAW), this study addresses the growing demand up-to-date environmental data in national LCI databases. The updated LCIs cover onshore and offshore wind farms with modern turbine capacities from 2.3 MW to 15 MW. A total of 39 datasets were created, including infrastructure datasets and electricity production datasets at the wind farm level, as well as aggregated wind electricity mixes for Switzerland and Europe. These inventories are compliant with the FOEN database protocol and are based on the reference year 2024. The modelled system covers all life cycle stages: manufacturing, transport, installation, operation and maintenance (O&M), decommissioning and end-of-life (EoL) treatment. For each turbine size, separate LCIs were created for moving parts (blades, hub, nacelle), tower, foundation, and electrical components (substations, cables). The models account for realistic transport routes, vessel activities, replacement rates over 25 years, and SF6 leakage emissions. The Swiss wind electricity mix was modelled using 2.3 MW and 3.4 MW onshore turbines with the national capacity factor from Swiss wind energy statistics. For the European context, the wind electricity mix includes both onshore and offshore installations. Onshore turbine sizes include 2.3 MW, 3.4 MW, 4.5 MW, and 6.2 MW, while offshore turbines include 5 MW, 10 MW, and 15 MW units. The selected configurations reflect actual market shares and future trends (e.g. growing role of 10–15 MW turbines offshore). Environmental impacts were assessed based on the global warming potential (GWP, IPCC 2021), cumulative energy demand (CED), and the total environmental impact according to the Ecological Scarcity Method. GHG emissions range from 10.4 to 22.7 g CO2-eq./kWh. Offshore wind generally has higher impacts due to vessel activities than onshore wind, despite higher capacity factors (~34% for offshore vs. ~23% for onshore in Europe and ~19% in Switzerland). The Swiss wind mix yields 18.1 g CO2-eq./kWh, higher than the European average of 14.9 g CO2-eq., due to lower capacity factors and smaller turbines. The total environmental impact and CED for the Swiss mix are also 13–16% higher than for the European mix. This study enhances the quality and representativeness of wind power data for LCA studies, supporting more accurate environmental impact assessments and policy decisions in the context of climate goals and energy transition strategies. It also ensures alignment of the Swiss FOEN database with current wind technology.