HAWC2 (Horizontal Axis Wind turbine simulation Code 2nd generation) is an aeroelastic code intended for calculating wind turbine response in time domain.

The core of the code was developed mainly within the years 2003-2007, by the Aeroelastic Design Research Program at DTU Wind, DTU Risø Campus in Denmark.

HAWC2 is developed and distributed by DTU Wind Energy and has been used in numerous research projects and industrial applications. HAWC2 has a large number of users and is used both for design and verification purposes.