This study explored how fluctuations in satisfaction and perceived partner commitment were associated with stability measures (e.g., commitment, perceived stability, relational uncertainty, turbulence) in both on-again/off-again and noncyclical relationships. Participants completed an initial survey, 8 weekly surveys, and a final survey. Results suggest fluctuation in perceived partner commitment across the weekly surveys was associated with all measures of stability when moderated by relationship type; fluctuation was negatively associated with the stability measures for noncyclical relationships but positively for on–off relationships. For fluctuation in satisfaction, this same pattern was found for commitment only. Overall, fluctuation, particularly in perceived partner commitment, was not viewed as disruptive for on–off partners; rather, fluctuation appeared to foster more steady and viable views of the relationship.