"Shops will be open with tables of goods for sale and there will be food vendors selling everything from coffee to Indian meals so people can have dinner and enjoy a night in town."
Ms Scarrow said the restoration has taken a lot of time, energy and research.
"The work was supported with a grant from the Four Regions Trust."
A range of experts have been working to remove layers of old paint to expose the Victorian fountain's original features.
Tiles have been replaced and repainted with a waterproof membrane and the arms that support the gas lamps at the top have been restored.
The lamps have been retrofitted with reflectors to project the light and electricians were completing the work on Tuesday.
The fountain is a memorial to Whanganui's first mayor, William Hogg Watt, who owned Lake Westmere before gifting it to the town as a water supply in the 1870s.
In 1881, the Whanganui Chronicle reported that the opening of the fountain brought the townspeople out in "great force".
Described as an "elaborated gothic", the fountain was designed by Whanganui architects Ross and Wright and made of cement, cast iron and marble.
When tram lines were installed in 1906, the fountain was moved to Cooks Gardens then spent several years in storage before being moved to Queen's Park in the 1930s.
A new base was installed when the fountain was returned to its original site in 1993.
