Wednesday morning will see showers develop with a southerly change.
Showers will then clear as a northerly develops and conditions will be fine for the remainder of the week with a high of 26C forecast for Sunday.
Mr Glassey said the heat over the weekend was due to a humid air mass with the front that brought temperatures nearing 30C.
"With the westerly flow over the country the eastern area will get warmer."
MetService recorded a toasty 27.5C at Napier Airport on Saturday.
Temperatures will hover around the mid to late twenties with the low not dropping below 12C.
A scorching Saturday evening next weekend is forecast for the kick off of the Black Barn's concerts which will feature Kora, Katchafire and Sons of Zion opening the summer series.
The hot and dry conditions prompted the Hastings District Council to impose a restricted fire season last week.
Napier City Council is also expected impose a restricted fire season today.
A restricted fire season means people can not have open air fires without a permit.
People were advised to burn only in suitable conditions which meant observing the wind direction to avoid any smoke nuisance to neighbours.