Costco Grafton Gas Prices
950 Port Washington Rd, Grafton, WI 53024
Warehouse #628 · Most expensive of 11 in Wisconsin
Most expensive of 11 in Wisconsin
Prices last refreshed — always verify at the pump.
30-day price trend
Located at 950 Port Washington Rd in Grafton, Wisconsin, this Costco gas station opened on August 30, 2007 and has been serving members for over 18 years. Gas station hours at Costco Grafton are 6AM – 10PM Monday through Friday, 6AM – 8:30PM on Saturday, and 6AM – 7:30PM on Sunday, while the warehouse itself opens 10AM – 8:30PM on weekdays.
Regular pump prices at this station have eased about $0.36 over the past month, from $3.999 a month ago. Premium has eased about $0.55 over the same period.
Costco Grafton Gas Station Hours
- Monday6AM – 10PM
- Tuesday6AM – 10PM
- Wednesday6AM – 10PM
- Thursday6AM – 10PM
- Friday6AM – 10PM
- Saturday6AM – 8:30PM
- Sunday6AM – 7:30PM
A current Costco membership card is required to fuel up. Hours may differ on holidays — confirm at the warehouse before a long drive.
Costco Grafton Warehouse Hours
- Monday10AM – 8:30PM
- Tuesday10AM – 8:30PM
- Wednesday10AM – 8:30PM
- Thursday10AM – 8:30PM
- Friday10AM – 8:30PM
- Saturday9:30AM – 7PM
- Sunday10AM – 6PM
Services at this warehouse
Departments & programs
Station map
Click the marker to open in Google Maps for directions.