CubeSats, being small satellites used for educational and scientific purposes, face significant thermal management challenges due to their compact size. This research paper focuses on conducting a thermal analysis of a 1U educational nanosatellite (CubeSat) utilizing Thermal Desktop and SINDA/FLUINT software. The study involves the development of a detailed 3D thermal model of the CubeSat using Thermal Desktop software, followed by thermal simulations using SINDA/FLUINT software. By evaluating the CubeSat's thermal performance under various operating conditions, the analysis aims to identify potential thermal issues that may arise. The results gained offer significant understanding of the CubeSat's thermal behavior and suggest ways to improve the design for increased dependability and performance. This research contributes to the understanding of CubeSat thermal management and facilitates the development of improved design strategies for effective thermal control. By addressing thermal challenges, CubeSats can achieve enhanced performance and ensure the success of educational and scientific missions. The results of the thermal investigation show that every CubeSat component is functioning within allowable temperature ranges, meeting an essential requirement for any space mission to be successful. By offering a framework for the creation of better design techniques for efficient thermal control, this study advances the subject of CubeSat thermal management.