Nearly one million people tuned in to watch Team New Zealand's nail-biting efforts on Sunday morning - more than 16 times the number of viewers who normally watch TV One during that time slot.
Sunday usually averages 56,000 viewers between 8am and 10am but between 8.15am and 8.45am, the channel had an average audience of 927,000, which was the highest number for all races last week.
That figure dropped to 900,000 for the second race that morning in the 9.15am to 9.45am slot, despite it being postponed.
The channel had 77 per cent of the audience share over all New Zealand channels at that time.
TVNZ's head of television, Jeff Latch, said he was excited by the record numbers.