An experimental analysis of natural convection in a top and right side open tilted cavity with the bottom heated plate is presented. The bottom heated plate is maintained at a uniform constant temperature in a steady state. The cavity contains the ambient air (Pr = 0.71). The other side walls of the cavity are insulated and considered to be adiabatic. The air velocity and temperature are measured at the different points of inlet and outlet cross sections. The air streamlines inside the cavity are visualised using the charcoal smoke. The free convection in the tilted cavity at inclination angles 15° and 30° is studied. The efficient cooling by natural convection inside cavity is observed at the low inclination angles. This experimental study reveals the mechanism of free convection in top open and side vented cavity in a better convincing way. This paper discusses the effect of tilting the cavity with the heated bottom plate, which is not much discussed in the heat and mass transfer literature. The outcomes of this study are useful in designing the effective heat dissipation of electronic components inside a top open and side vented cavity.