Aucklanders are being asked to hold off cleaning the car or water blasting the deck in a bid to stave off water restrictions.
Drought is expected to continue across the North Island during the next couple of months with little significant rainfall forecast.
Auckland's water reserves currently look more like large puddles than lakes. Months of below-average rainfall is taking its toll on the city's nine dams, with water levels 25 percent lower than this time last year.
It's the worst the city has seen in decades.
New figures from NIWA show the Coromandel Peninsula is also in severe drought.
"That's one area that's been exceptionally dry," NIWA principal scientist Chris Brandolino said.
Meanwhile, the rest of the North Island isn't much better off.
"March, for much of the upper North Island, did not get normal rainfall," Brandolino said.
"Unfortunately the pattern we're expecting for the next three months - we're expecting a lot of westerly type winds.
"It's not exactly an ideal airflow for rainfall."
Across Auckland's nine dams, the total water storage is at just 53 percent. That's because since the beginning of the year, there's been 65 percent less rainfall
Showers account for almost 30 per cent of overall home water use. If Aucklanders stuck to four-minute showers instead of the average eight, they'd save 80 million litres per day.
