"There'll be a high of 17C on Wednesday, 18C on Thursday, 17C on Friday and 18C on Saturday."
Overnight temperatures would be 6C on Wednesday and 10C on Thursday and Friday, Corrigan said.
Both Saturday and Sunday nights would bring temperatures around 8C.
"It's looking to be a fine day on Sunday, with a high of 16C."
Corrigan said MetService had updates online about the best time of day to get out of the house during Covid-19 alert level 4.
"We are doing regular bubble walk forecasts, which is pretty handy at the moment."
The updates cover three periods of the day - 9am to 12pm, 12pm to 3pm, and 3pm to 6pm.