The Bay of Plenty will enjoy a taste of summer over the next few days, with the MetService forecasting daytime temperatures of around 20 degrees.

An 'exceptionally fine day” is being forecast for most of the country today, with the Mercury set to be pushed up into the twenties.

The Bay of Plenty will experience mostly fine weather as the week progresses. Photo: File.

The fine weather is expected to stick around today and tomorrow before giving way to some showers on Thursday.

A front slowly makes its way up the country as the week moves on, bringing wet weather with it, but it would weaken by the time it left the South Island on Thursday.

"It's generally ridgy conditions for much of the country, except for that front over the lower south," says MetService Meteorologist Chelsea Glue.

"There'll be clear skies for a lot of places, with warm temperatures and light winds."

Temperatures are expected to be up around 20 degrees in the north, while eastern parts of both Islands will reach the mid-20s during Tuesday and Wednesday as warm north-westerlies blow through.

A cooler south-west change sweeps over the country from late Wednesday, bringing a spell of showers to most.

But Friday and Saturday will see sunshine return to the Bay.