We present an optical closure exercise using in situ hyperspectral radiometry and Inherent Optical Property (IOP) measurements acquired in Lake Geneva, (Switzerland/France). The dataset includes 294 high-resolution profiles for the period between 10/2018 and 5/2020. Hydrolight was used to simulate remote sensing reflectance (Rrs) from measured IOPs. The comparison with measured Rrs was carried out under six different scenarios: (i) a temporally constant backscattering ratio (Bp=0.0183) without scattering correction, (ii) temporally variable Bp estimated from measured IOPs without scattering correction, and (iii-vi) temporally variable Bp estimated from measured IOPs and using four different scattering correction methods. The results indicate that both a reasonable estimation of Bp and scattering correction of IOPs are crucial for optical closure. We did not find a significant difference in the performance of the different scattering correction methods. Our results suggest that automated optical profiling is an alternative for ground-truthing water-leaving reflectance.