The steeling effect suggests that “optimal” stress positively affects well-being by enhancing resilience. However, there is lack of longitudinal investigations in diverse age groups. The aim was to explore steeling in later life and potential predictors. The sample consisted of N = 195 participants. A 1-year longitudinal survey study was conducted. Sociodemographics, experienced stress, resilience resources, and satisfaction with life were assessed. Latent profile analysis was used to identify profiles that differ in the change of resilience resources over time and to examine differences between the profiles across the other study variables. Three profiles emerged: decreased resources (Decrease), stability of resources (Maintenance), and increased resources (Increase). “Decrease” was characterized by low, Maintenance by moderate, and Increase by high stress. Age influenced profile membership. While the results failed to support the classic steeling effect, with high stress associated with increased resilience resources, optimal stress was associated with the maintenance of resilience resources.