This work presents foam flood experiments with surfactant (AOS) at different temperatures, from 20 °C to 80 °C, in a sandstone porous medium. Results show that one cannot fit foam-model parameters to data at one temperature and apply the model at other temperatures, even if one accounts for the change in fluid properties (surface tension and liquid viscosity) with temperature. Experiments show an increase in gas mobility in the low-quality foam regime with increasing temperature that is inversely proportional to the decrease in gas-water surface tension. In the high-quality regime, results suggest that the water saturation at which foam collapses fmdry increases and P_c* decreases with increasing temperature.