Lake Hāwea Karate Club members Mackenzie, 12, Kaz, Olivia, 12, and Craig Smith, with friend Adam Hall. PHOTOS: MARJORIE COOK : Third annual Lake Hāwea Polar Plunge

Ella Key, 8, Sienna Cassin, 9, and Freya Brown, 8, all of Lake Hāwea. : Third annual Lake Hāwea Polar Plunge

Odin, 9, and Lily, 8, Nicholson, of Lake Hāwea. : Third annual Lake Hāwea Polar Plunge

The Cochrane family of Lake Hāwea, Phil and Kaeleen, Maya, 6, Maylan, 9, and Lilya, 11. : Third annual Lake Hāwea Polar Plunge

Organisers Jess Clark and Kaz Smith, of Lake Hāwea. : Third annual Lake Hāwea Polar Plunge

Staff from Kanuka Corner early childhood centre Hoki De Goldi, Sam Macdonald, Francesca Buckley, Helen Mckie, Kiara Sabine, Heather McKenna and Anna Edkins, all of Lake Hāwea. : Third annual Lake Hāwea Polar Plunge

Kyla Columbus and Georgia Chatterton, both 6, of Lake Hāwea. : Third annual Lake Hāwea Polar Plunge

Florence Chow and Janice Milburn, of Lake Hāwea. : Third annual Lake Hāwea Polar Plunge

Lake Hāwea Karate Club members Kaz Smith with her twin daughters Mackenzie and Olivia, 12. : Third annual Lake Hāwea Polar Plunge