Most of the country will have a clear night sky on Monday to view the first and last supermoon of the year.
The full moon will happen early on Tuesday morning, when its proximity to the earth and to the sun means it will shine 30 per cent brighter and will appear around 14 per cent bigger.
Metservice Meteorologist Ciaran Doolin said a clear night was expected for most of the country, bar a couple of areas.
"Places like Fiordland, Southland and Otago, there's a weak front that's moving over there at that time", he said.
Doolin said there would also be some cloud around the Bay of Plenty, but predicted it would be fairly isolated.