Auckland entered the alert level 3 lockdown at midday on August 12, with the rest of the nation moving up to alert level 2 amid a new outbreak of Covid-19.
Canned meals, baking staples, toilet paper, and vitamin supplements were among the most sought after products during the first lockdown.
Antoinette Laird, Foodstuffs head of corporate affairs, said the products in demand last lockdown are also in demand now, however, new trends have emerged.
"We've seen a spike in frozen and chilled fish purchases this round of lockdown that we didn't see last lockdown," she said.
It was similar for Countdown stores, which saw a 20 per cent increase in demand across their entire frozen section.
Mince is still hugely popular, a spokesperson said, with the sales of cleaning products also high since the start of March, earlier this year.
"Frozen poultry value-added and vegetables seem to be people's go-to, both with more than 30 per cent growth," they said.
"Other frozen favourites in the last few weeks are ice-cream, dumplings, frozen pizzas, party snacks and convenient ready-made frozen meals."
Chicken is the most popular meat, with demand increasing almost 30 per cent over the past fortnight in comparison to the same period in 2019.
Haircare, hair dye, skin and body care products are also very popular at Countdown, with hair and beauty retailers forced to close like during the last lockdown.
Liard says along with the lockdown staples, Foodstuffs customers treated themselves to treats like chocolate, blue cheese or a bottle of wine too.
Vitamin and supplement company Health by Habit, ranged exclusively at Foodstuffs supermarkets, saw a 20 per cent increase in sales.
Despite a brief spike in demand during the first days of this lockdown, Laird said Foodstuffs customers are now shopping normally and demand has settled.
Countdown is pleased Auckland shoppers heeded the supermarket's advice not to panic buy despite a re-emergence of Covid-19 and another lockdown.
"We've seen very few, if any, queues in our stores, and while there was a rush when the alert level changes were announced a couple of weeks ago, Kiwis have been shopping very calmly, which is great," the spokesperson said.