How big is the surfing lagoon? October 16, 2019 11:16 Follow Our surfing lagoon is 22,000 square metres in area, which is similar in size to the famous MCG’s playing surface! Related articles How does surfing at URBNSURF Melbourne compare to ocean surfing? How many waves will I catch per hour? Can I surf at night? Can I use a hard/glassed surfboard in the Play in the Bays designated area? How deep is the lagoon?