Tidal waves occur at night due to the moon’s attraction. Though the moon is present in the day too, why are there no tidal waves?

It is not true that there are no tidal waves during the day. Tidal waves are the result of the gravitational pull of the moon and the sun, but the effect of the sun is much less than that of the moon. In fact, tidal waves occur twice on any day-night cycle of 24 hours — once when the moon is right over the head, and for the second time when the moon is in the opposite position.