It was frosty in some South Island locations this morning ahead of a large belt of high pressure about to cross all of NZ in the days ahead.

This big high will push away the sub-tropical low and any rain for the North Island.

Overnight lows will be below average in many places for the next four nights though, while daytime temperatures bounce back above average for many by Friday or into the weekend.

Next week a storm in the Tasman Sea and a low near Fiji / Tonga will be worth monitoring but, for now, pose no direct threat to New Zealand.