Coroner Barb McLintock says 34 people drowned in recreational incidents between July 1 and Aug. 21.
There were 22 drownings during July and August last year.
In 2010, 24 people died during the two months.
McLintock says seven people died this year while swimming while others fell into the water unexpectedly or were boating, tubing or attempting to cliff-dive.
She says better safety measures could have prevented some of the deaths during a year that has seen higher-than-usual water levels.