Meghan is said to be in "good health" and the itinerary for the Rotorua trip, which includes a visit Te Papaiouru Marae, Rainbow Springs, meeting the public outside Rotorua's Government Gardens, the Redwoods Treewalk and meeting representatives of the local mountain biking community at Whakarewarewa is still on.
Rotorua deputy mayor Dave Donaldson said the fact they were having a baby was just lovely.
"It will work well with the experience we have set up for them in Rotorua.
"At the forest, we will be sharing the young families who are really getting into, and doing well in, the mountain biking scene."
Donaldson said it would be amazing to see the baby take its first mountain bike ride in the Rotorua forest one day.
Destination Rotorua chief executive Michelle Templer said it was wonderful news for the royal couple and very special for Rotorua to be so closely connected to this happy time for them.
"We know that the extensive range of family-friendly activities here is a big part of why people come back to Rotorua time and time again, so it would be the perfect place for the family to return to during a future tour."