"In the event of clear weather, the event will still be on the riverside at the original location."
But if there was rain or high winds, Lim said the event would be indoors at the War Memorial Hall and the forecourt space between the War Memorial Centre and Whanganui Regional Museum.
Lim said the audio and visual equipment they used for the event could not get wet and he did not want bad weather to affect the number of people attending the event.
He said October 1 at the Memorial Hall was the only time slot available for a council-owned indoor facility.
"This is the last time the date will change," Lim said.
"It is the first day of the school holiday[s] for most people, so I sincerely hope this also means more people."