max daro explains. >> reporter: the king tide returned to the bay area on saturday morning. soaking some lowerline lying walkways along the embarcadero. >> you think you looking at something you see every day, your feet get wet and it's not what you see and you start to back up. >> reporter: it's yearly phenomenon. one stan peckner likes to photograph. >> be careful. because you never know when that wave is going come up and bite you in the butt. >> reporter: it occurs when the moon, earth and sun comess in alignment with the moon closest to the earth and earth closest to the sun. >> we will have a higher than usual high tide and lower than usual low tide. >> reporter: it's an educator with the explore toreium who taught the large and curious group about it. >> normal tidal range from the area from the average highest tides and average lowest tides is 6'. on like today, the difference in the water levels from the high tide to the low tide, is going to be about 8'. >> reporter: exciting to experience from the shore, and from the water. birds and humans alike. the surfers hit