Patea, 51, told police he just wanted to get home.
A breath test showed he was more than four times over the legal alcohol limit of 250mcg, with a reading of 1156mcg.
He pleaded guilty to driving with excess breath alcohol.
Defence lawyer Stephanie Burlace said Patea had one other drink driving conviction, but that it was from 20 years ago.
"In my submission that's clearly a substantial break in time, and I would suggest is not a pattern."
She said Patea was a contributing member of the community and worked full time as a teacher.
He was "very embarrassed" and referred himself for alcohol treatment.
Judge Philip Crayton fined him $1400, $130 court costs, and disqualified him from driving for eight months.