If travelling to Canada via vehicle, you can check using the link below the wait times at the border.

https://www.wsdot.com/traffic/border/default.aspx

There are 3 borders to cross.

1. Peace Arch is the busiest. Peak time 3.4 pm all the way through 6. Has no duty free.
2. Pacific Highway is generally faster and has duty free
3. Abbotsford is 41 miles east of Vancouver and opens 24 hours a day