African easterly waves (AEW) are the major sources of synoptic scale precipitation over Western Africa during boreal summer. Although many studies have investigated their relevance, little is understood about the role of AEW phase speed in controlling maximum precipitation. This study investigates the dynamical association between maximum precipitation and AEW phase speed using reanalysis datasets and the Coupled Model Intercomparison Project Phase 6 (CMIP6) datasets in the current climate. We found an inverse relationship between phase speed and maximum precipitation, then the high-speed southern tracks enhance maximum precipitation compared to the slow propagating northern tracks of the AEW. The probability density distribution in the composite analysis reveals broader peaks in maximum precipitation and intensity of AEW in reanalyses, while CMIP6 models show narrower peaks, suggesting constrained variability.