A new low quickly moving across the Tasman Sea today is likely to prompt more rain warnings for the North Island says the crown forecaster.

This second low is likely to be further north and should see rain moving in from the north west meaning regions that face north west are likely to see sustained heavy rain.

Most at risk will be eastern Bay of Plenty, which was hit by serious flooding at the start of winter.

North west facing regions of Northland, Coromandel Peninsula, the Kaimai Ranges and Central Plateau/King Country are also at risk of rain warnings.

The rain is likely to develop during Tuesday and easing later on Wednesday.