This work aims to underline the sampling frequency impact of the SCADA data on the wind turbine blades damage estimation. Previous studies emphasize on the needs of a 1 Hz frequency signal to carry out wind turbine blades damage computation without proving this assumption. Such an approach requires a large memory capacity regarding to the lifespan of the wind turbines as well as strong calculation resources, restricting the application of this method in the current windfarms. The present study investigates on the impact of the wind speed sampling frequency on the blades damage estimation to determine if whether or not it is relevant working with higher frequencies than the standard 10 min SCADA data. Then, the possibility of using a transfer function to convert standard 10 min SCADA data into 1 Hz signal is proposed, making able to apply this method to current windfarms.