Either go early or go late when you are heading out to the beach with your children. Early doesn't mean at the crack of dawn. Just make sure you are there when there is less of a crowd, or better still use sites like Sandy Beach Trips to find beaches that are not as famous as the better-known ones. This way you don't have to worry about taking small children who would not always be interested in going to the beach. If you can go late, but this would have to be just after sunset and that might be dangerous especially if you don't know the area that you are in.