Too many swimmers regard their abilities in the water too highly, says the Whakatane Surf Life Saving Club's head guard.
Mitch Coldicutt said people could get into trouble if they overestimated their swimming abilities.
"They realise their limits when they get out of their depth."
Mr Coldicutt said parents must always keep an eye on their kids and should ask lifeguards for information about water conditions on the day.
After a disappointing seven drownings this holiday period, water safety officials say more could be done to educate the public. Surf lifesaving club captains said too many people do not realise fins or flippers need to be used with boogie boards in deeper water.