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Styrofoam waste was used as a lost circulation material to prevent sudden and simultaneous drilling fluid losses. In this study variations of styrofoam amount and temperature were carried out to see the effect of mass and temperature on physical and rheological properties of drilling mud. Measurement of mud properties using Viscosimeter (Fann VG Meter) with rotor rotation speed of 300 RPM and 600 RPM. The results of the study were then compared with the drilling mud standard. The values of viscosity, plastic viscosity, yield point, gel strength and mud cake increased when the amount of styrofoam added to the mud increased, after the mud was heated to 243°F there was a decrease in the physical and rheological properties. Water loss value will increase along with the addition of LCM substances into the composition and temperature raised in the range of 0.6 mm -1.7 mm. pH level decrease but with a mixture of pH control substances, the pH of drilling mud maintained in alkaline conditions which ranges from 9.5-11.5. The combination of mud that best fits with the standard was addition with 1 grams of Styrofoam and heated in 243oF.