https://www.metservice.com/towns-cities/auc...uckland-central

check the temp from metservice, last week overnight temp is close to 0 and frosty grass in the morning, south island will be colder

Also a reminder, it wasn't the temp that make you feel cold. it is the wind and absent or sunshine

Hope that help

Auckland winter is not that cold. Normal tshirt and fleece jacket should suffice. Most important is, bring thick socks and youre good to go. But if you plan to go further south, then you will need thermal shirts. And you can get those cheap at the Warehouse too. I myself wear 1thermal+fleece jacket, cotton track bottom and blanket socks (bought from daiso). My place here in Palmy North, lowest temp right now is 3deg, highest is 22. But of course, when sleeping you just turn on the heater la.. 😁

This few days the temperature in Auckland around 17, night time around 14, still not that cold.

I would say normal/light jacket will be good enough