Anybody who enjoyed Northland's warm, sunny weather yesterday may want to stop reading now as more rain is on the way this week.

MetService duty forecaster Francis Russell said Northlanders could expect cloudy periods today, with light showers mainly in the western parts of Northland, with a high of 16C and an overnight low of 10C.

Tomorrow there would be long fine spells with a couple of showers, a high of 16C and an overnight low of 10C, Ms Russell said.

Cloud is expected to start increasing on Wednesday with showers developing. On Thursday there will also be showers, but temperatures look set to increase slightly, with a high of 18C and an overnight low of 12C, she said.

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"Then on Friday the rain becomes heavier and more persistent."

It was too early to say if the rain would also see the issuing of another MetService weather watch. Northland had its second-wettest winter on record this year. This June to August was the second-wettest winter since records began for Whangarei in 1937, with about 840mm of rainfall recorded. The wettest was 1946, in which 1050mm fell between June and August.

Meanwhile, the National Institute of Water and Atmospheric Research three-monthly weather outlook from September to November predicts temperature, rainfall, soil moisture and river flows in Northland are likely to be near or above average.