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Brief Forecast for all New Zealand
Valid to Midnight Monday, 18-May
Northland
Cloudy periods and a few showers, especially in the east, where some may be heavy.
Auckland, Coromandel Peninsula, Bay of Plenty and Taupo
Mainly fine. A few showers about the northern parts of Auckland and the Coromandel Peninsula, spreading elsewhere in the evening.
Waikato to Kapiti, including Taumarunui and Taihape
Fine, apart from some cloudy areas and valley fog, morning and evening.
Gisborne to Wairarapa, also Wellington
Mostly cloudy. A few showers, especially about Gisborne and Hawke's Bay.
The South Island
Mainly fine with morning frosts. Areas of cloud or fog, mainly about the coast and inland valleys, morning and night.
Chatham Islands
Cloudy, with a few light showers.
Outlook for following three days
Tuesday
North Island: Partly cloudy with isolated showers in Northland, Auckland, Coromandel and Gisborne. Mainly fine elsewhere.
South Island: A few showers in Fiordland. Mainly fine elsewhere, with areas of morning and evening low cloud, mainly in valleys.
Wednesday
North Island: Partly cloudy in the north with isolated showers.
South Island: Morning low cloud of fog in Canterbury, otherwise mainly fine. However, a few showers in Fiordland, spreading to southern Westland later.
Thursday
North Island: Cloudy periods in the north with isolated showers. Fine elsewhere, apart from areas of morning cloud or fog.
South Island: Mostly cloudy with showers in Westland and Fiordland, and isolated showers in Grey and Buller. Mainly fine elsewhere, with increasing high cloud in the south.
Friday
North Island: Cloudy periods in the north with isolated showers. Fine elsewhere, apart from areas of fog inland morning and night.
South Island: Cloudy periods in the west with showers in Fiordland and Westland. Isolated showers developing in Southland. Mainly fine elsewhere.
Chatham Islands
Mostly cloudy. The odd light shower until Thursday. Southwesterlies, turning northwesterly on Thursday.
Issued: 11:30pm Sunday 17 May 2026