A sub-tropical storm may be on a collision course with the North Island this week.
Niwa has issued a heads-up to holidaymakers saying models show the storm, fuelled by an atmospheric river from the tropics, is set to come near the North Island this Friday.
The storm, packed with strong northeasterly winds and heavy rain, could sweep over the North Island and parts of the South Island this Thursday and Saturday.
Holiday hotspots Coromandel Peninsula, Bay of Plenty and Gisborne could be in line for some of the wettest weather.
Niwa said the coming storm may be an "impactful" system.