North Islanders may struggle to sleep this weekend with stifling hot nights expected while hot winds batter the south.
MetService meteorologist Tui McInnes said the daytime temperatures in the north won't be that far above average but it is the overnight temperatures that will be high.
"In Auckland, normally this time of year temperatures drop to 13C overnight but for the next few nights, it's looking to be 18C or 19C.
"A bit further south to Napier and Hastings, they're looking at 19C tonight and 22C on Saturday, they usually get about 10C which makes for quite restless sleep if you're not used to it."
23C is forecast in Auckland today, 25C in Whangārei and 23C in Hamilton. In Wellington, temperatures are slightly lower with 18C.