Whangaehu dairy farmer Jules Le Lievre was one of those who dressed up for the occasion, although no one was sure if he was Superman or Wonder Woman.
He had done the midwinter swim years ago but decided to make a return this year.
"It was colder back then, I can tell you. Must be El Nino or something," he said.
"I don't do this normally. Call it a moment of madness. But I might do it again next year."
And Year 13 Whanganui High School students Abby Hurley, Jadzia Morris, Hypatia Orchard and Sapere Simon got wet rather than wedded at the midwinter swim at Castlecliff Beach yesterday.
They all wore bridal veils and carried a posy of flowers.