The effect of high temperature on mechanical properties of silicon carbide particulate reinforced cast aluminum alloy composite has been investigated. 15% volume fraction silicon carbide aluminum alloy (6063) composite was cast by stir casting technique. The samples were machined to tensile, impact and hardness test samples and were tested at room temperature and elevated temperatures of 100°C, 250°C and 400°C. The results showed that the ultimate tensile strength, yield strength and hardness of the composite are enhanced at the elevated temperature. However the impact energy was observed to decrease with increase in temperature.