His speech is expected to be short on policy detail, but Mr Shearer is expected to pledge to make the regions a priority, including ensuring local roads are in good repair and investing in local businesses and education rather than expecting people to move to the main centres for education or training.
He is expected to argue that people in the regions are losing their jobs, have fewer educational chances and are being forced to Australia to get good wages - one of the attacks Labour has increasingly made on National since National's pledge before 2008 to reduce the income gap with Australia and slow the brain drain.
But National rejects this argument, saying the population in almost all regions was increasing, other than in Canterbury.
When he was elected Labour's leader in December, Mr Shearer said trying to get higher support in the regions was one of his main priorities and said he would travel round marae, pubs and clubs in an effort to do so.
Other Labour MPs have also been told to be more active in the regions.
REGIONAL LOSSES
Northland
* Unemployment up from 7.1 per cent to 8.7 per cent since 2008
* 2293 people moved to Australia over past year
Waikato
* Unemployment up from 4.4 per cent to 8.6 per cent since 2008
* 4810 people moved to Australia
* Job losses include 140 jobs at SCA Hygiene and 54 from Inland Revenue
Bay of Plenty
* Unemployment up from 4.5 per cent to 8.5 per cent since 2008
* 4024 people moved to Australia over past year
* Job losses include 40 at Goodman Fielder, 38 from NZ Dairy Processing, and 38 at Inland Revenue