Mr Brownrigg said the good weather would have encouraged people to get out and enjoy the attractions, but the increase would have already been a "sealed deal".
"We could see by the accommodation that people were planning to come to Rotorua, regardless of what the weather was going to be like."
He expected Waitangi Day to be similar in visitor numbers and said people wanting to stay in Rotorua for this week's long weekend should start booking.
Rotorua Association of Motels chairwoman and owner of Cedarwood Lakeside - Motel and Conference Venue Fiona Suurenbroek said accommodation for next weekend was already sparse.
"It is filling up quite nicely, there's not much left for Waitangi weekend so my advice to people wanting to stay would be to get in quick."
Pig & Whistle general manager Rosie Harding said they had reaped the benefits of the long weekend.
"We had decent crowds for both lunch and dinner, across all three days. We usually have a strong mix of both tourists and our local regulars."
Chamber of Commerce chief executive Darrin Walsh said Rotorua was benefiting from the surge of visitors each long weekend.
"This long weekend it was likely we got many Auckland families looking to get out of the city and decided to come to Rotorua. Their spending their money here and that's got to be good for us."
Mr Walsh said it was possible some of those families would stay the week, making the most of the two long weekends in a row.
"It is likely some will stay the whole week and spend Waitangi Day here too. We definitely see more people around on long weekends but I would say there would be an increase in people around from today to Friday as well."
According to the MetService website, rain is forecast to set in from Friday with the wet weather turning into showers by Monday.
However, the temperature is expected to sit in the mid to high 20s.
Weekend events:
* Tarawera Ultramarathon
* Classic & Wooden Boat Parade
* Hot Tub Funk Band
