Going for it . . .Clyde Primary School senior pupils, along with a few hardy parents and teachers, take to the waters of Lake Dunstan in their annual polar plunge.

Despite the temperature on land being a bone-chilling 3degC, the hardy souls stripped down to swimsuits and dived right in.

Teacher Barb Lambeth told the children full immersion was required and dipping their heads to get wet hair would not count. They emerged shaking themselves and heading for towels and robes.

Parent Nicole Joyce, who joined daughter Devon Lambeth in the water, said afterwards while it was not too bad as there was no wind to chill them.

Clyde school principal Steph Kitto said the polar plunge had been a tradition for year 7 and 8 classes for 10 years.

Each year, more parents participated too, she said.