Mrs Miller said the beaches had been very busy this summer, but people had generally been well-behaved.
"We haven't had too many reports of bad behaviour. Most people have been swimming between the flags and following the lifeguards' advice," she said.
There are around 20 lifeguards in Whanganui, all of whom are volunteers.
"Most of them have other jobs. Some of our senior guards have had to work every day this summer."
Mrs Miller said the club is always on the lookout for strong swimmers who would like to train as lifeguards and training starts in October each year.
If you are interested, email wanganuisurflifesaving@outlook.com.