Groundnut seeds are highly nutritious, with elevated oil and protein contents that accelerate deterioration during storage. This study evaluated the effects of storage duration on the moisture content and physiological parameters of polymer-coated groundnut seeds (cv. ICGV 91114, ‘Devi’). The experiment was conducted in a completely randomised design (CRD) with 14 treatments and three replications. Seeds were coated with six polymers using a seed coating machine; hydroxypropyl cellulose, methyl cellulose, ethyl cellulose, isopropenyl acetate, polyvinyl pyrrolidone and Disco AG Red L-144 at two application rates (3 and 4 kg-1 seed or 3 and 4 mL kg-1 seed, depending on polymer), while uncoated kernels and pods served as controls. After coating, the seeds were packed in high-density polyethylene (HDPE) bags and stored under ambient conditions for 6 months. Moisture content and physiological traits were evaluated monthly. During the first month of storage, moisture content and physiological parameters showed no significant differences among treatments. However, with increased storage duration, moisture content gradually increased while physiological parameters declined. After 6 months of storage, moisture content increased from 6.00–8.04 % and germination declined from 100–66.00 % in the uncoated controls (T2), whereas polymer-coated seeds exhibited lower moisture accumulation and reduced deterioration. Uncoated seeds and pods exhibited higher moisture content and a greater reduction in germination and vigour by the end of the storage period. In contrast, polymer-coated seeds showed slower increases in moisture content and lower rates of decline in germination and vigour. Among all treatments, Disco AG Red L-144 (T13 and T14) and polyvinyl pyrrolidone (T11 and T12) performed best, maintaining the highest germination (87.58 %) and lowest moisture content (6.67 %) after 6 months of storage were recorded in T14 (Disco AG Red L-144 at 4 mL kg-1 seed) followed by T13 (86.84 % germination and 6.97 % moisture content. These findings demonstrate that polymer coatings, particularly Disco AG Red L-144 and polyvinyl pyrrolidone, effectively reduce moisture uptake and preserve seed physiological quality during ambient storage, thereby improving groundnut seed storability.