Costco Simi Valley Gas Prices

• Monday5:30AM – 10PM
• Tuesday5:30AM – 10PM
• Wednesday5:30AM – 10PM
• Thursday5:30AM – 10PM
• Friday5:30AM – 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 Simi Valley Warehouse Hours

• Monday10AM – 8:30PM
• Tuesday10AM – 8:30PM
• Wednesday10AM – 8:30PM
• Thursday10AM – 8:30PM
• Friday10AM – 8:30PM
• Saturday9:30AM – 7PM
• Sunday10AM – 6PM