Poor fruit set impacts oil palm productivity on both peat and mineral soils. Despite the crucial role of the pollinator Elaeidobius kamerunicus, the relationship between weevil density and anthesis stages across different soil types remains underexplored. This study investigated E. kamerunicus density on anthesising male and female inflorescences on peat and mineral soils over one year. Sticky traps were used for female inflorescences (Day 1–4) and spikelet sampling for male inflorescences (Day 1–5). Results showed that E. kamerunicus population density on female inflorescences varied significantly (P < 0.01) across days of anthesis. Day 1 exhibited the highest population; however, Day 1 and 2 were statistically similar. Weevil population density (measured both per spikelet and per inflorescence) exhibited a highly significant variation (P < 0.01) across the male inflorescence anthesis stages. Weevil population peaked significantly on the Day 3 of anthesis. Crucially, population dynamics were consistent across both soil types, suggesting soil composition does not alter weevil visiting patterns. While the timing of peak visitation was similar across sites, the overall population density of E. kamerunicus was significantly greater on mineral soil than on peat soil. Correlations between weevil population and abiotic factors were generally low. Consequently, this study confirms a distinct relationship between the anthesis stage and E. kamerunicus density. These findings provide essential guidelines for timing field monitoring to improve oil palm management and ensure effective pollination.