Northerlies on Saturday with a front lying across the far south of the South Island. This front starts to march northwards over the South Island overnight meanwhile another approaches the western North Island. A fairly wet day in store on Sunday with thundery falls possible for most of the upper North Island, conditions starting to clear for South Westland.

Showers and sunny spells for the northern and western North Island on Saturday, mainly sunny in the east although Wairarapa could see a few spots of rain in the afternoon spreading from the west. Expect rain for the West Coast, perhaps the odd rumble of thunder, heavy rain about Fiordland spreads northwards in the evening. Showers or rain about Nelson spreads into Marlborough from afternoon. Sunny areas and some high cloud in the east. Some rain about Southland (mainly morning), spreading into Central Otago in the evening (heavy) then coastal Otago overnight.

Areas of rain for the upper North Island on Sunday, thunderstorms possible also mainly in the afternoon. A dry morning in the east then rain moves in by midday. Heavy rain about North Westland eases from afternoon, heavy rain moves into Wellington during the morning then eases by evening. Morning showers about South Westland then afternoon sun. Showers for Southland and Otago push into Canterbury during the afternoon.

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz