Central sections of Wellesley St and Victoria St were also closed from just before 10pm, as a black sea of pedestrians spread further out from the waterfront.
More than 20,000 people walked the fan trail from Britomart to Eden Park.
Five North Shore children, Ella Hine, Oliver Charlesworth, Anton Hine, Simba Moors and Bayden Moors, aged 7 to 11, summed up the party mood on the waterfront when they climbed on to the keel of the America's Cup yacht KZI at the Viaduct Harbour and did a haka.
One group of Springbok fans were walking round the waterfront with a mock Webb Ellis Cup and the sign, "It's ours until 11pm".
Nine fans were dressed as sheep with the words "All Blacks" on their backs. Said Zoe Wells: "Everyone has been walking up and stroking us."
Andrew Hansen said he was aged only 1 when the All Blacks last won the cup in 1987. "I'll be here yelling and screaming for them all night. It's going to be the night of my life."
A balmy Auckland afternoon meant many fans chose the Madden St fan zone and open spaces at Wynyard Quarter to watch the final.
The grassed areas created a "picnic" type atmosphere.
The apparel of choice was the traditional All Black jersey, but the number of "Keep Calm Piri's On" T-shirts were a testament to the popularity of the All Black halfback.
Those who arrived early got a special preview on the big screen. The 1987 Rugby World Cup final between the All Blacks and France set the scene as music boomed and alcohol flowed.
Stephen Heslin and Thomas Arnald were enjoying the atmosphere on the waterfront. Mr Arnald said he didn't want to miss out on the fan zone experience before the World Cup ended. "This is my first time here," he said. "I'm pretty blown away by the crowds."
Peter, a fan from Ponsonby, said he preferred Wynyard Quarter to the other fan zones. "I like the grass here. I like sitting out in the open space and soaking up the vibe."
Kirsty, from Mt Eden, said the atmosphere was buzzing. "You can really feel it."