Included are datasets from wellbore breakout experiments conducted under triaxial conditions with varying fluid and temperature environments. This dataset serves as one of the experimental reports for the Role of Fluid and Temperature in Fracture Mechanics and Coupled Thermo-Hydro-Mechanical-Chemical (THMC) Processes for Enhanced Geothermal Systems project by Purdue University (Utah FORGE R&D project 5-2557). Tests were performed on Sierra White granite (SWG) to investigate the effects of fluid and temperature on fracture initiation and propagation from a geothermal borehole. The dataset includes raw data from seven experiments, along with detailed measurements of sample geometry, borehole dimensions, temperature, and failure strength. A report on all experimental testing protocols, experimental design, and a summary of results is available in the reference list.