The highest median sale price last year was in April, and the lowest in August.
Mr Whitaker said the median was easily distorted by sales at one end.
The sale of state-housing properties heavily distorted the median in the second half of the year, he said. While that brought the median sale price down at the end of the year, prices had actually firmed.
January was the quietest month - determined by the number of sales - while May was the busiest.
Mr Whitaker said the adage of well-presented, three to four bedroom properties with good garaging, in a decent area had proved true, and they were selling well.
"We're definitely seeing more competition now than what we were at the beginning of last year."
Real Estate Institute of New Zealand (REINZ) chief executive Helen O'Sullivan said the median Bay sale price had "bounced around" in 2012 and the overall trend was "steady, to gently improving". The median price reflected the disparate areas in the Bay, she said.
While the December median sale price for Napier City was $312,500, it dropped to $128,000 in Dannevirke.
Napier's December median was not far off the national figure, Ms O'Sullivan said.
The national real estate market closed last year with a new median house price record of $389,000, up 9.6 per cent on December 2011.
A total of 74,000 houses sold during 2012, a 21 per cent increase on the previous year and the highest annual total since 2007.
Ms O'Sullivan said Auckland and Christchurch notched up strong growth and the real-estate market posted big gains nationwide last year, particularly with the number of sales by auction.
"That's probably reflective of broader trends in the property market. Auckland and Christchurch are the two markets where supply is tightest so it's more of a sellers' market."
The total number of auctions reached 11,950 last year, or 16.1 per cent of all sales, compared to 7101 auctions or 11.6 per cent of all sales during 2011.
Hawke's Bay by the numbers
$270,000 - median sale price for 2012
2355 properties sold
Eight properties sold for more than $1m each
Month of highest median sale price - April
Month of lowest median sale price - August
Quietest month - January
Busiest month - May
Source: REINZ