When does a high tide occur.

 High tides occur when there is a gravitational pull on the ocean's waters, which is primarily caused by the moon and the sun. The gravitational force between the moon and the Earth causes the water on the side of the Earth closest to the moon to be pulled towards it, creating a bulge in the ocean that we experience as a high tide.

High tides occur twice a day, approximately every 12 hours and 25 minutes, due to the rotation of the Earth. The exact timing of high tide varies depending on the location and can be affected by other factors such as wind and currents.

In general, high tide occurs when the moon is directly overhead or on the opposite side of the Earth from the observer. This is known as a spring tide and occurs twice a month, during the full moon and new moon phases. During these times, the gravitational pull of the moon and sun are aligned and work together to create a greater difference between high and low tide.

Overall, high tide is a complex phenomenon influenced by a variety of factors, but it can be predicted using tide charts and tables that take into account the loc
ation and time of year.