Definition
"High tide" is the point when the sea reaches its highest level during a tidal cycle. It is the peak of the rising water level, before it begins to recede. High tide occurs due to the gravitational pull of the moon and sun on Earth's oceans. Knowing when high tide occurs is important for coastal activities, such as boating and swimming. It is opposite of "low tide" when the sea level is at its lowest. Imagine the ocean swelling up to its maximum point on the shore.