This week kicks off with high pressure and while a bit cloudy with a few showers for some regions may places will have a fairly mild day.

In fact in the days ahead some places will be several degrees warmer than average thanks to a sub-tropical northerly flow.

However a low is also forming in the Tasman Sea and will likely bring a late week burst of rain, showers and another South Island temperature drop.

This weekend high pressure returns for a time before the next low out of the Tasman Sea this time next week.