Work began on September 26 with a blessing at the site.
Art museum staff said many people came in to watch the monks working on the mandala, often more than once.
Museum director Ruth Green Cole said the process created a strong sense of community engagement.
"It has been an incredibly popular exhibition. As the work on the mandala itself was done mainly during school holidays, there was ample opportunity for children and families to come and see it."
More than 1500 people visited during the nine days.
Between the placement of the first grains of sand and a mandala's eventual dissolution, witnessing it is said to create positive energy and make one's mind peaceful and clear.
Within that clarity, and symbolised by the destruction of the mandala, is an understanding of impermanence and non-attachment.
However long it takes the monks to create a mandala, on completion they pray over it and then destroy it.
Scattering the deconstructed mandala into a river or sea is also said to appease the greedy, wealthy water spirits called nagas.
Members of the public can bring flower-heads as offerings during Sunday's ceremony and are advised to bring cushions to sit on.
The ceremony, which will begin in the museum at 10.30am before moving to the Sculpture Walk, will be followed by a lunch at Shiraz at 1.30pm, with a cost of $12 a person (please book).