Temperatures in the North Island this long weekend would mostly be in the low 20s, Ms Blades said.
The weather was also looking fine in the South Island, she said.
Auckland was in for warm temperatures, peaking in the low 20s over the four-day weekend.
Among events in the city this weekend, the Streets Easter Show starts today at ASB Showgrounds with circus acts, rides and exhibits, plus an A&P Show.
The Waiheke International Jazz Festival kicks off on the island tomorrow and finishes on Sunday.
Daylight saving starts on Sunday when clocks go back one hour.
Auckland outlook
Tomorrow Fine with light winds. High 23C, low 13C
Saturday Fine. Westerly breezes. High 23C, low 15C
Sunday A few showers. Southwesterlies, dying out. High 23C, low 14C
Monday Partly cloudy with not much wind. High 22C, low 16C