These are pictures of high and low tide taken from my porch.  You all know by now I live on XXXXX Harbor.  Tides are caused by the moon's gravitational pull on Earth's water.  While the moon pulls =on  This forms two bulges, where the moon is overhead and the opposite side of the earth from the moon.  The sun also is involved, but to a much lesser extent.  It would often amplify of reduce the tides caused by the moon.    They were taken February 24.