They also had to perform a sea-tube rescue and learn a first-aid module, and CPR, among other tasks.
The club had 40 members actively patrolling Riversdale beach last year and club captain Mike Taylor said the additional 12 lifeguards would be "very handy".
"Riversdale is known as a surf beach, we have a lot of residents come out and stay there in the holidays and the majority [of them] like to swim.
"It can be a tricky beach with the currents that it has; we do a significant number of rescues every year," Mr Taylor said.
Last year, lifeguards were involved in 25 rescues, he said.
The club was also recently awarded Surf Life Saving New Zealand's rescue of the month, for the off-season, for a rescue done by one of the club's lifeguards which involved a car accident near Riversdale.
"Even when the flags aren't up we're still working."
Mr Taylor warned people to keep safe while swimming at Wairarapa beaches this summer.
"No matter where you are swimming, make sure you have got an adult looking after you and when swimming at a patrolled beach swim between the flags and know your limits."
The Riversdale Surf Lifesaving Club will be on patrol at Riversdale beach every day from December 26 until February 6.
After February 6, they will be on patrol during weekends until the end of March.