CrownGate car park will open for 24 hours a day, seven days a week from today (July 1).
The new opening hours follow a review of customer feedback.
Previously the car park opened from8am to 12.30am from Monday to Sunday.
Ramsay Floyd, CrownGate centre manager, said: "We see more shoppers and visitors enjoying the evenings and socialising into the early hours. It is important to offer people the option to leave their vehicle in a safer environment, while providing a car park that has been awarded for its lighting, effective surveillance, cleanliness and quality management, for people to return to anytime of night."