The Mediterranean sea does have tides, but they are are very limited as a result of the narrow outlet/inlet with the Atlantic ocean. Their amplitude is very low, averaging a few centimeters, (instead of 1 meter of so in the Atlantic ocean). All of these things affect the amplitude of the tides seen in a given spot.

Because the earth is rotating it will continue to do so unless a force is applied to either speed it up, or slow it down.

Even though the sun is much more massive and therefore has stronger overall gravity than the moon, the moon is closer to the earth so that its gravitational gradient is stronger than that of the sun.

For swimmers, the water is safest during a slack tide, during which the water moves very little. A slack tide happens in the hour preceding or following a high or low tide. During high tide, the waves break too close to shore to offer much of a ride. During low tide, uncovered rocks or seaweed may get in the way.

The reason oceans and seas have waves is because they are much larger than the average lake. Waves are caused by winds blowing across the water surface. Larger the water expanse, deeper the water ( with a shallow coast ) and stronger the wind, larger the waves.

In UK waters, high tides occur approximately every 12 hours 25 minutes. It takes 24 hours and 50 minutes (a lunar day) for the same location on Earth to re-align with the moon. This is because the moon orbits the Earth in the same direction that the Earth rotates on its axis.

The Bristol Channel has the second highest tidal range in the world, only exceeded by the Bay of Fundy in Canada.

7-10m

The sea level rises at night because of the influence of the moon’s gravity.