costco hours @costcohours Posts (0) Active 4 months, 2 weeks ago Profile Comments View View Profile Followers 0 Following 0 Join Date 2023-12-14 Base Name costco hours Blogroll Costco hours vary by location, but most warehouses are open from 10:00 AM to 8:30 PM Monday through Friday, 9:30 AM to 6:00 PM on Saturday, and 10:00 AM to 6:00 PM on Sunday.