Congruency effects can be reduced when cues indicate high conflict between targets and distractors in conflict tasks. However, it is unclear how such effects are modulated by implicit temporal cues, as previous studies have revealed different results depending on the specific conflict task (Eriksen flanker vs. Simon task). To address this issue, in the present study short and long foreperiods (FPs) were associated with high or low conflict probabilities in classical two-choice versions of the Eriksen flanker and Simon tasks. In contrast to previous findings, congruency effects in mean reaction time were reduced with conflict-predicting FPs not only in the Eriksen flanker but also in the Simon task. However, in the Simon task, this modulation appeared irrespective of whether the short or the long FP indicated high conflict probability, whereas in the Eriksen flanker task, the modulation only appeared when conflict was associated with the long FP. Overall, the present study shows that conflict-predictive FPs can generally reduce congruency effects across different types of conflict tasks, even though the temporal dynamics in the modulation of the congruency effect may be task-specific.