Mobile traffic at The Guardian website has grown 63% year-on-year, the news coming as the newspaper re-launches its mobile site.

The Guardian said that at the start of 2011 mobile devices accounted for just over 10% of all visits to “core Guardian products”, rising to around 30% today. The newspaper added that there are already certain times in the week when mobile traffic outweighs desktop, such as Saturdays at 3pm (thanks to the football) and between 6am and 7am on weekdays (presumably due to commuter traffic).

The new mobile site should help to boost mobile traffic even further: it features a responsive design that automatically adapts to the user’s device and has been rebuilt to include new features, improvements and updates in response to reader feedback.

“We have rebuilt our mobile site from the ground up, focusing on improving user experience, reliability and download speed,” said Guardian product manager Chris Mulholland. “Our aim is to provide the best user experience for reading our content, whatever your device.”