Multicopter having: - a number N of electric motors MOT n for driving N propellers PROP n, where n = 1, 2,... N and N ≥ 2, - a first interface for providing first parameters P1 comprising: a 3D position r B = ( X B, y B, z B) of the centre of gravity B of the multicopter, the time derivatives: ṙ B and r̈ B a 3D orientation o M = ( α M, β M, γ M) of the multicopter and its time derivative ȯ M, - a second interface for providing an aerodynamic performance P a,n currently generated by each of the propellers PROP n, - a first unit which is designed such that it determines horizontal components ( v r,x, v r,y) of a relative velocity v r:=(v r,x, v r,y, v r,z) T of the multicopter to the air on the basis of the first parameters P1 and on the basis of a model M1 supplied for describing a dynamics of the multicopter as well as an estimate of a force screw τ e acting externally on the multicopter which is determined on the basis of the model M1, - a second unit which is designed such that it determines the vertical component ( v r,z) of the relative velocity v r on the basis of the determined horizontal components ( v r,x, v r,y) and on the basis of the aerodynamic performance P a, n - a third unit which is designed such that it determines the wind speed v w in an inertial system on the basis of the determined horizontal components (v r,x, v r,y), the vertical component ( v r,z), and on the basis of the parameters P1, - a storage unit for storing the wind speeds v w ( r B) = ( v w,x ( r B), v w,y ( r B), v w,z ( r B)) determined for the locations r B, and/or a transmission unit for wireless transmission of the wind speed v w ( r B) to a receiver. - a number N of electric motors MOT n for driving N propellers PROP n, where n = 1, 2,... N and N ≥ 2, - a first interface for providing first parameters P1 comprising: a 3D position r B = ( X B, y B, z B) of the centre of gravity B of the multicopter, the time derivatives: ṙ B and r̈ B a 3D orientation o M = ( α M, β M, γ M) of the multicopter and its time derivative ȯ M, - a second interface for providing an aerodynamic performance P a,n currently generated by each of the propellers PROP n, - a first unit which is designed such that it determines horizontal components ( v r,x, v r,y) of a relative velocity v r:=(v r,x, v r,y, v r,z) T of the multicopter to the air on the basis of the first parameters P1 and on the basis of a model M1 supplied for describing a dynamics of the multicopter as well as an estimate of a force screw τ e acting externally on the multicopter which is determined on the basis of the model M1, - a second unit which is designed such that it determines the vertical component ( v r,z) of the relative velocity v r on the basis of the determined horizontal components ( v r,x, v r,y) and on the basis of the aerodynamic performance P a, n - a third unit which is designed such that it determines the wind speed v w in an inertial system on the basis of the determined horizontal components (v r,x, v r,y), the vertical component ( v r,z), and on the basis of the parameters P1, - a storage unit for storing the wind speeds v w ( r B) = ( v w,x ( r B), v w,y ( r B), v w,z ( r B)) determined for the locations r B, and/or a transmission unit for wireless transmission of the wind speed v w ( r B) to a receiver.