Taranaki and the eastern Bay of Plenty face the risk of heavy rain.
The good news is that as the front moves north, better weather will follow in its wake.
By Tuesday - yes, when many people will be back at work - things could be settled again.
Tomorrow's forecast
Whangarei:
Partly cloudy, chance shower. Southeasterlies. High 20C, Low 14C.
Auckland:
Fine. Easterly breezes. 20C, 10C.
Tauranga:
Fine. Light winds. 19C, 10C.
Hamilton:
Morning cloud then fine. 20C, 5C.
New Plymouth:
Fine. 18C, 8C.
Napier:
Mostly fine, cloudy periods. 19C, 9C.
Wellington:
Fine with developing northerlies. 16C, 12C.
Nelson:
Fine with light winds. 18C, 8C.
Christchurch:
Morning cloud clearing for fine afternoon. 17C, 6C.
Dunedin:
Morning cloud clearing. 18C, 10C.