Dear Lukás,

These are some of the sources of time series of wind speed data that you could check:

Hope this is useful,

Jose

http://www.vortexfdc.com/

http://www.neweuropeanwindatlas.eu/

Dear Lukáš Tůma,

In addition to above, you can use ECMWF reanalysis data where easily you will get wind data for the entire world or any specific region.

Hope this help,

Best Regards

Piyush Patel

Dear Lukáš Tůma,

The State Meteorological Agency of Moldova should have the best time series of wind data. Try to get wind data from that agency.

For example, see link: https://www.researchgate.net/publication/313242780_Seasonal_prevailing_surface_winds_in_Northern_Serbia

Regards,

Milivoj B. Gavrilov

Article Seasonal prevailing surface winds in Northern Serbia