Men are twice as likely to drown as woman.
The experts say it is because men push the limits, overestimate their own abilities and underestimate the conditions.
There were 300 people rescued on Northland beaches in the five years ended December 31, 2016.
Of those, 210 - 70 per cent - were Caucasian men aged 16-25.
Ten of 15 people who drowned in Northland last year were men. Twice as many men as women.