The brain integrates information from both vision (lips movements) and audition (vocal sounds) during speech perception. Alsius et al. (2005) demonstrated that audiovisual speech integration falters under conditions of high perceptual load. Here, we investigated whether the temporal orienting of attention modulates the integration of audiovisual speech signals by measuring the prevalence of the McGurk effect under conditions of low perceptual load. Videoclips of a female speaker pronouncing different syllables (some of them containing McGurk-like combinations) were presented. Participants had to report what they perceived. Prior to the appearance of each videoclip participants were presented with an attentional cue indicating whether the speaker would appear soon (400) or late (1400) with a probability of 75%. The results showed a larger McGurk effect (arguably, greater audiovisual integration) when the stimuli appeared at the cued moment with respect to the uncued moment. Theses results clearly demonstrate that audiovisual speech integration depends on the deployment of attention even under conditions of low perceptual load.