Stormy weather will lower day and night-time temperatures in Northland but the mugginess is here to stay for a while longer.
Northland has sweltered through 12 consecutive days when the mercury has reached 25C or above, with an official high of 29.1C on January 25.
But with the temperatures recorded at Whangarei Airport it is sometimes more than 4C higher inland, and on January 25 the MetService recorded 33.1C at its weather station in Whau Valley.
Overnight highs of up to 21C have compounded the high daily temperatures and seen humidity levels soar to 80 per cent plus. The heat and humidity have seen people flock to the region's beaches and swimming holes.
But MetService said a deep low pressure as a result of the fizzled-out Tropical Cyclone Fehi in the Pacific Ocean will lower daytime temperatures in Northland from about 27C to 24C tomorrow. Overnight lows will come down to 15C or 16C over the weekend.