The swimmers excelled at last month's New Zealand spring championships in Mt Maunganui to clinch places in the New Zealand teams.
Waves club swimmers Shane Patience (18) and Phoebe Williams (16) have both been selected for the Junior Pan Pacific championships in Guam in January.
Two more members of coach Andy Adair's Waves squad, Stefanie Gillespie (13) and Phoebe O'Leary (14), will compete in the Pacific Schools Games in Canberra, Australia, from November 30 to December 6.
Katie Kenneally (17), a member of coach Gennadiy Labara's Osca squad, has been selected in the New Zealand team for the Australian Youth Olympic Festival in Sydney from January 14-17.
Adair has been appointed head coach of this team, with former New Zealand representative Kay Alexander chosen as manager.
Patience, a student at the Sports Institute of Otago, also represented New Zealand at the Oceania championships where he gained two top-eight placings with personal best times.
He gained his selection by top performances against open-grade swimmers in Mt Maunganui.
He won a silver medal in the 400m freestyle with a short-course time of 3min 53.38sec for a Fina score of 828 points.
It was a personal best time by 2.93sec.
Patience added a bronze medal in the 1500m with his qualifying swim of 15min 26.01sec.
Williams, one of three St Hildas Collegiate School pupils in the New Zealand teams, qualified for Guam when she won the open women's 800m freestyle in a personal best 8min 47.28sec.
It was worth 835 Fina points and was her first New Zealand open women's title.
The two other St Hildas pupils are Gillespie and O'Leary.
Gillespie has been entered for all the freestyle events but her best event is the 800m, in which she has a personal best time of 9min 11sec.
O'Leary has been entered for five events but her best prospects are in the 200m breaststroke and the 400m individual medley.
Kenneally, a pupil at Taieri College, qualified for the Australian Youth Olympic Festival in the 200m individual medley.
It has been a good year for Kenneally, who won three breaststroke medals - gold in the 200m, silver in the 100m and bronze in the 50m - at the national age group championships.
She also won eight gold medals at the Otago championships and a dozen medals in the Otago and South Island secondary schools championships, where she set records for the Otago 50m breaststroke and the South Island 100m breaststroke and 400m individual medley. She represented New Zealand in the transtasman tri-series in Australia.
