They had a midwinter swim at Warrington Beach as part of a Southern Free Beaches event, and swimming togs were unnecessary for the occasion.
Ian West, of Waitati, described the dip as invigorating.
"You don’t feel the cold after a while," he said.
"I could’ve stayed longer."
Lynn Cooke, a member of the Alpine Lakes Naturist Club, said toasted marshmallows, a warm fire and good company were among the attractions for her.
"I do this every year," she said.
Philip Matthews, of Dunedin, decided full immersion was necessary.
"Once you’re in it, it’s really nice."
The St Clair Beach Polar Plunge, which attracts costumed participants, had been scheduled for yesterday, but it was postponed because recent weather had compromised safe access to the Dunedin beach.
A midwinter swim went ahead at Kaka Point, south of Balclutha, and about 25 people participated.
The Kaka Point Surf Life Saving Club provided warm clubrooms, and a barbecue and hot drinks were available.
There were prizes for best costume, longest in the water and least layers.
