A large low deepens in the Tasman Sea on Friday bringing unsettled weather to the South Island, heavy rain for the West Coast. A northwesterly airflow lies over the North Island with a front pushing in from the west overnight.

A mix of sun and increasing cloud for the western North Island on Friday, the odd shower at times from Taranaki down through to Kapiti. Overnight rain or showers for all. Dry for most of the east coast with northwesterlies, spots of rain may spread into Wairarapa at times especially evening.

Heavy rain for the West Coast of the South Island, torrential falls possible at times then easing later in the evening or overnight. Scattered rain spreads into eastern areas at times during the day especially Banks Peninsula southwards.

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz