Monday will see highs of 17 degrees Celsius and 16C in Napier and Hastings respectively, with overnight lows of 13C and 12C.
James said due to the amount of cloud cover, overnight temperatures will be a bit warmer than usual at this time of year.
"With those mild overnight lows the area isn't expected to have any frosts this week, which would be the typical thing going on," he said.
Temperatures will remain steady across Hawke's Bay throughout the week, with highs of 16C to 18C across Napier and Hastings for the entire week.
Wairoa is likely to see the coldest expected overnight low of the week, with temperatures expected to drop to 7C on Wednesday night.
While showers and northwesterlies are expected in Hawke's Bay on Tuesday and Wednesday, temperatures will rise to 18C in Napier and Hastings in the latter stages of the week.