Seasonal changes significantly influence the physicochemical parameters of aquatic ecosystems, thereby affecting the health, distribution, and survival of aquatic organisms. This study investigates seasonal variations in water temperature, pH, dissolved oxygen (DO), biological oxygen demand (BOD), turbidity, total dissolved solids (TDS), and nutrient concentrations (nitrates and phosphates) in a selected freshwater body. The results reveal pronounced seasonal fluctuations in all parameters, with summer showing increased temperature and BOD, while monsoon leads to high turbidity and nutrient influx. These variations directly impact aquatic biodiversity, species richness, and the metabolic activities of aquatic organisms. Understanding these dynamics is vital for ecological monitoring and sustainable water management.