Tomorrow night will be wet and windy across much of New Zealand, the MetService warned today.
Heavy rain and gales are forecast as several low pressure systems cross the country.
The MetService has warnings in place for several North and South Island regions as ex-tropical cyclone Vania and current tropical cyclone Zelia head toward New Zealand.
MetService spokesman Bob McDavitt said that during tomorrow afternoon and evening a low pressure system, formerly cyclone Vania, was expected to move onto the northern South Island.
"This is expected to bring outbreaks of rain to the North island and northwest of the South Island.
"Heaviest falls are likely in the area from Westland to Nelson and across Marlborough, as well as north Taranaki, the central North Island, and the main North Island ranges."
Mr McDavitt said the system was expected to merge with a mid-latitude low crossing Southland and then deepen east of Otago during Wednesday.
He said Zelia was expected to rapidly leave the tropics tonight and continue to weaken as it moved across the central or southern North island tomorrow night or early Wednesday morning.
"This is a fast-moving and rather small system," he said.
"While it will no longer be a tropical cyclone when it reaches us, it may still pack a windy punch."
Mr McDavitt said the area that would get the strongest winds remained uncertain, but was likely to include Taranaki, Taumarunui, Taihape and inland Wanganui.
WeatherWatch.co.nz spokesman Philip Duncan said it was time for campers, trampers and boaties in particular to be aware of the severe conditions moving in.
He advised campers around the country to stay up to date with the latest warnings and current weather news and be prepared to safely leave their location at any given time should it be affected by flood waters or severe gales.
