Hearings will be held before the three commissioners: Basil Morrison (chair), Anne Carter, and Janie Annear and are open to the public.
Carterton councillor Jill Greathead said it was important people show their support for those in the community making verbal submissions.
"I would encourage people in Wairarapa to support those people who have had the courage to speak at the hearings."
The LGC has confirmed further hearings are expected to be held in Wairarapa next month, with dates yet to be confirmed.
Super-city opponents Carterton Voice are ramping up for the hearings by holding a workshop tonight to give people tips on how to prepare their verbal submissions - at the Tarragon Cafe, Carterton, 5-7pm.