Generally speaking, people need at least one week of rest at home after the cataract surgery, and they should take very great care of their eyes in case of the unsuccessful effects after the surgery due to inappropriate use of eyes. There is strong sunshine and strong sea wind on the beach, which is not good for your eyes just after the cataract surgery. The ultraviolet rays in the sunshine can do great harm again to your eyes, and the bacteria, sand, dust and so on can also easily infect your eyes. A pair of sunglasses could be a bit helpful for your eyes to screen off the ultraviolet rays in the sunshine, but it is better for you not to go to the beach. You can do some walking, playing some chess games to get rid of the boredom of staying at home.