Here’s a look at some of the best times to shop at Costco. If you visit Costco right after the store opens on a weekday morning, before 11 a.m., you’ll avoid the chaos that is often experienced on busy weekends. Many stores do see an uptick in visitors during the lunch hour, so it’s best to get in and get out before lunchtime. Another one of the best times to visit Costco is during the week between the hours of 3 p.m. and 5 p.m. This two-hour window is after the lunch rush, but just before people start showing up after their workday. Costco managers also say you’ll avoid crowds if you visit the store within an hour of closing on a weeknight.