Wave impact loading is a violent hydrodynamic loading event characterised with extreme magnitude and short duration. It is often associated with the occurrence of freak waves, which are of high amplitude, steep wave front and large fluid particle velocity. Due to the highly nonlinear nature of impact loading, its magnitude is typically more than twice as large as Morrison loads on a single structural member. Such a large and localised load can potentially cause structural damage to the key components of offshore platforms. To predict wave impact loading in a random sea, the first thing to do is modelling impact loading correctly. In this seminar, I would like to introduce my PhD project in modelling wave impacts, and current progress in modelling the water entry problem of a falling cylinder by a compressible solver in OpenFoam.