The man was described as in his early 20s, with light coloured skin, of a medium build and about 1.7m tall.
He was wearing dark framed reading glasses, dark coloured tight fitting beanie, grey hoodie and blue jeans.
Police were also interested in a light coloured vehicle, possibly a late 90s Toyota Corolla described as having round lights at the front and dents in the back.
The vehicle was seen parked on Owhata Road from 6.15am and driving on Baxter Place before the incident, police said.
Anyone with information about the incident was asked to contact the Rotorua police on 07 348 0099 or Crimestoppers on 0800 555111.