The gold fleet sailed three finals races yesterday morning, in which Burling and Tuke placed 13th, 8th and 8th.
"We didn't sail super well, which we were a bit annoyed about, but at the same time the guys that were close to us sailed worse so we ended up with a pretty huge lead again which is really nice," Tuke said post-race.
For Burling and Tuke, taking the silver medal at the London 2012 Olympic Games has motivated the pair toward finishing one place better at Rio 2016.
Since being beaten by Australia's Jason Outteridge and Iain Jensen in London, who are also campaigning towards Rio 2016, the New Zealand crew has won every 49er event they've sailed.
Earlier this month the pair took out the highest award a sailor can receive - the ISAF Rolex World Sailor of the Year for 2015.
"Being named ISAF Rolex Sailor of the Year last week was pretty special and we had our heads down concentrating on this trying to get the best prepared we could, so we'll sure enjoy it with our coach Hamish [Willcox] and the rest of the Kiwis here. Then we'll look forward to getting back to New Zealand and sharing it with family and friends," Tuke said.
Scheduling of events in the 12 months leading into the 2016 Olympic Games means that Burling and Tuke will defend their latest world title in less than three months, with the 2016 49er and 49erFX World Championships taking place in mid-February in Florida, US.
Until then, Burling and Tuke will return home for the New Zealand summer and will attend the 2015 Volvo Yachting Excellence Awards in Auckland next Friday.