Wood drying is essential in many industries, and knowing its dynamics is critical for optimizing efficiency. This study examines how two wood species, Pine and Beech, behave after drying under the climatic conditions of Errachidia during July. Through the use of mathematical modeling and numerical simulations using TRNSYS, the research thoroughly examines the effectiveness of the solar collector, the changing moisture content of wood across different species and thicknesses, air-drying temperature, and the latent heat evaporation process. The outcomes highlight that the flat plate collector achieves an efficiency of 34.89% with a 350.21 K outlet temperature. The capability of this solar wood drying system is demonstrated by the air-drying temperature, which achieves 342 K. In addition, the findings show that Pine dries more quickly than Beech wood due to its lower density. In particular, while Beech wood of the same thickness takes 105 h to reach the appropriate moisture content, Pine of 22 mm thickness does so in just 91 h. Furthermore, Beech wood at the same thickness as 42 mm requires 126 h for drying, compared to 119 h for Pine. The research not only advances ecological practices but also aids in the processing of wood and the use of renewable energy.