What time does Sam's Club open?

You are likely safe if you figure on 10:00 a.m. It could vary by store or day of the week - or the type of membership you have.

A search of their website seems to indicate that their regular opening hour is 10am, Sunday through Friday. They open at 9am on Saturday. The stores are open for Business or Plus Only memberships from 7am to 10am Monday through Friday and 7am to 9am on Saturday.