A tide table is a little tool that is smart to have if you are going to be spending time next to the ocean. It tells you what time high tide and low tide will be each day. That's good to know, especially if you're going to really set up shop for a while on the beach, which many people do. Some people bring their own little civilization to the beach with them: tarps, coolers, toys, and appliances. You'd think they were planning to live on the beach.