**With each passing day, the high tides occur about an hour later.** The moon rises about an hour later each day, too (actually, 54 minutes later). Since the moon pulls up the tides, these two delays are connected. As the earth rotates through one day, the moon moves in its orbit.

The tides occur 50 minutes later each day **to allow the Earth to catch up to the moon.** 24 hours and 50 minutes is the time required for the moon to return to the same spot above the Earth because the Earth is spinning on it’s axis as the moon orbits the sun. You might be interested in.

This of course begs the question “How often do tides occur in a day?”

Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every **24 hours and 50 minutes.**

The amount of days that pass between the minimum and maximum of tidal range in any given area is 14 because that is the amount of time that the Moon is in a full moon phase and a new moon phase. How would the tides be different if the Moon revolved around Earth in 15 days instead of **30** days?

## What happens to the tides when the Earth rotates?

As the Earth rotates, that area moves away from the moon’s influence and the tide ebbs. Now it is **low tide** in that area. As the Earth keeps rotating, another high tide occurs in the same area when it is on the side of the Earth opposite the moon (low high tide).

Since the moon pulls up the tides, these **two delays are connected.** As the earth rotates through one day, the moon moves in its orbit. A point on the earth must move a little farther than one rotation to line up with the moon again.

## How far ahead can tides be predicted?

**How far ahead can tides be predicted? Tides can be predicted far in advance** and with a high degree of accuracy. Tides are forced by the orbital relationships between the Earth, the moon and the Sun. These relationships are very well understood and the position of the celestial bodies can be forecast very accurately into the future.