The 17-year-old won three gold medals, a silver and a bronze at the NSW Country Swimming Championships in Sydney over the weekend, smashing three NSW country records in the process.

While the records he broke in the 50m and 200m breaststroke had only been standing for one year and three years respectively, his personal best time of 1:01.95 in the 100m breaststroke eclipsed a record that had remained unbroken for 21 years.

Forster Aquatic Swim Club coach Peter Sanders believed Nash's continued improvement in the pool was the result of his unwavering work ethic.

"He's extremely dedicated," he said.

The times Nash achieved also saw him qualify for the Australian Short Course Championships in Melbourne in October.

Fellow 17-year-old Claire Van Kampen enjoyed a successful meet, collecting gold in the 100m and 200m backstroke and a bronze in the 100m individual medley.

She is also heading to the School Sports Australia championships and will do so with confidence after achieving personal bests in both her winning races.

11-year-old Forster prodigy Harrison Tancred picked up a number of medals, including gold in the 50m breaststroke, silver in the 100m breaststroke, and bronze in both the 50m and 100m backstroke.

Close behind him was Ethan Hudson, who swam a personal best on his way to a bronze in the 11-year boys' 50m breaststroke.

10-year-old Eva Keen nabbed a pair of silver medals in the 50m and 100m freestyle, achieving personal bests in both races.

Captain of the Forster Aquatic Swim Club Jesse Wilkes also found her way onto the podium, claiming bronze in the open women's 50m freestyle and setting a personal best along the way.

Mr Sanders was pleased with the performances of all the club's swimmers, not just those who made the podium.

"It was one of the best meets we've ever had," he admitted.

He put the club's continuing success down to a great harmony among the team.

"The kids are getting on so well in training," he said.

"There's great camaraderie there."

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