This work deals with the study of pressure and temperature variations in the liquid nitrogen tank (GN2) due to sloshing in the presence of gaseous nitrogen (GN2) and gaseous helium (GHe). Planar (1.5 Hz), chaotic (1.6 Hz), and swirl (1.8 Hz) regimes of sloshing with respect to the present geometry and fluid properties are chosen to study the effects of wave motion on the pressure and temperature evolution in LN2 tank. It has been observed that the pressure and temperature change are quite different with change in the sloshing mode. Presence of ullage gas (LN2, GHe) affects the mass transfer mode (condensation or evaporation) in the cryogenic tank as partial pressure of the vapor of the slosh liquid varies when it is pressurized with different gases. The temperature in the ullage region above 0.5 m is not affected for all sloshing cases. Sloshing after GN2 pressurization shows nearly 50% reduction in pressure in swirl mode compared to a very small drop in planar case. However, sloshing followed by GHe pressurization shows an increased pressure due to evaporation dominance.