There will also be a period of rain developing in the evening, mainly for inland areas.
On Wednesday those showers will become isolated early in the day and southerly winds will make the day cooler than the beginning of the week, according to Best.
"On Thursday, once again it's mostly cloudy with some isolated showers around the ranges," he said.
Friday is also cloudy with southeasterly breezes.
Best added the region won't be getting massive amounts of rain or anything too extreme.
Monday's highs of 24C in Hastings and Napier will increase to 26C on Tuesday, with overnight lows of 12C and 13C respectively.
Temperatures start to fall from Wednesday with the two districts expecting highs of 21C, while Waipukurau, Wairoa and Mahia can expect highs of 19C.
Thursday will see more decreasing temperatures with Napier and Hastings experiencing highs of 19C and 18C respectively, while Waipukurau and Wairoa will see highs of 17C.
The lows in Napier remain somewhat steady at the start of the week before dropping to 11C on Thursday.
Hastings is expected to drop to as low as 9C on Thursday and Friday.