 This study investigated how changing the wind direction affected the turbine wakes and associated power losses in the Horn's Rev offshore wind farm. The results showed that changing the wind direction had a significant impact on the power output of the wind farm. Even a slight change in the wind direction could increase the power output by up to 43%. This highlights the importance of considering the wind direction when designing and managing offshore wind farms. This article was authored by Fernando Portagel, Chang Hongchen, and Yu Ting Wu.