The last two days had been a success with plenty of competitors and good crowds with the same expected today, Mr Mitchell said.
"Rodeo and shearing always draw a few people."
The showgrounds were looking wonderful and anyone who could should take the opportunity to enjoy a family day out today, he said.
Wairoa A&P Show equestrian secretary Merryn Maxwell said some rain on Thursday was great because it helped keep the grounds in good condition for yesterday and today.
The last two days have been great with a good number of quality entries from around the country, she said.
"Everything is tracking along nicely, lots of top riders have come to compete.
"The quality is right up there this year."
People have travelled from around Hawke's Bay, Rotorua, Kerikeri, Katikati and south Auckland with many of the same competitors as previous years but also some newbies.
The highlights today will be the pony and horse showjumping grand prix, she said.
Wairoa Mayor Craig Little, who was helping with the carpark yesterday afternoon, said the show was a great thing for the district and everyone should go along.
Events this year have included the equestrian dressage competition, dog-trials, a "Rural Iron Man" competition, home industries, a scarecrow competition, a sheep section, rodeo, shearing and showjumping.
Entertainment includes Lulu the Clown, bouncy castles, a mechanical bull and a vertical bungy.
Pony rides have also made a return to the show after several years' absence.
Today's events:
Equestrian Showjumping - All day starting at 8am
Working Hunter Horses & Ponies - Starts at 7.30am
Sheep Section - Judging starts in the morning
VetEnt Zoo, Event Fun, Inflatable Madness, Pony Rides, Lulu the Clown, TC Mini Jeeps - All day
Thistle Competition Judging - 9am
Judging Men's Baking Section - 10.30am
Scarecrow Judging Competition - 11am
Dog Trials - All day starting at 6.45am
Eastland Farm & Building Supplies Fencing Competition - Starts in the morning
Farmlands Rural Iron Man Challenge - Kids start at 8.30am and adults start at 1pm
Show Shearing - Starts at 9am
Open Rodeo - Starts at 8.30am