Additionally, more international visitors were coming to New Zealand for long holidays, allowing them plenty of time to get to Northland.
Those visitors were coming from Australia, the UK, Germany, USA and Canada, said Mr Davis.
Statistics New Zealand figures show Northland had 793,000 guest nights last summer. That compared to 338,000 the previous spring and 403,000 the following autumn. A guest night refers to one guest spending one night in a hotel, motel, backpacker establishment or holiday park.
Ministry of Business, Innovation and Employment figures show an estimated $661 million was spent on tourism in Northland in the year to March 2015.
The spending included $116 million on fuel and other automotive products and $112 on alcohol, food and beverages.
Tourism Industry Association New Zealand chief executive Chris Roberts said this summer was set to break records for the tourism industry nationally.