How high is Up at The O2? Toni 17 May 2022 16:26 Updated Follow Up at The O2 is 52m at its highest point. Related articles How many people are in each group? How do I know if I can complete the climb? Will my climb go ahead if the weather’s bad? How long does the climb last? I’ve got a fear of heights. Can I still climb? Comments 0 comments Article is closed for comments.