"It's unusual for people to smell it but you can see it high in the sky. It makes sunsets a bit dramatic."
Meanwhile, the weather is set to improve hugely in most parts of the country, particularly in the North Island this week, where dry conditions are expected.
A large high-pressure system is to cover a lot of the country starting from today and settling by tomorrow, meaning a drop in high winds and more sunshine.
Aucklanders can look forward to fine and dry weather, with temperature highs from 24C to 27C going into the weekend.
Mr Brenstrum said it was perfect "beach weather" in the North Island this week.
"It's better than what we've had in the past two months," he said.
Similar conditions are forecast in Hamilton and Waikato, with a few light showers expected tomorrow and Wednesday.
Mr Brenstrum said conditions might change slightly just before the Auckland Anniversary next weekend.
"It's looking like you might end up with easterlies in Auckland."