Filip Nowacki (born 1 October 2007) is a British competitive swimmer who specialises in breaststroke. Representing Great Britain, he won gold medals in both the 100 m and 200 m breaststroke at the 2025 World Aquatics Junior Swimming Championships in Otopeni, Romania, setting multiple records in the process. In the same year, he won four gold medals at the 2025 European Junior Swimming Championships in Šamorín, Slovakia, and eight gold medals, representing Jersey, at the 2025 Island Games in Orkney.
At the 2026 Commonwealth Games, he won the first ever swimming medal for Jersey with silver in the men's 100 metre breaststroke. The following day he won Jersey's first gold in the pool, winning the men's 200 metre breaststroke.
Career Nowacki started training with Tigers Jersey and is now coached at Millfield by Keiron Piper. He first gained international attention at the 2023 European Youth Summer Olympic Festival (EYOF) in Maribor, Slovenia, where he won silver in the 200 m breaststroke, before winning three medals at the 2023 Commonwealth Youth Games in Port-of-Spain, Trinidad. During this period, he was still training at Tigers Jersey under Nathan Jegou.
In July 2025, Nowacki won gold in the 200 m breaststroke at the 2025 European Junior Swimming Championships in Šamorín, Slovakia, breaking the European junior record with a time of 2:08.32, before completing the double by winning the 100 m breaststroke. He won two further gold medals swimming the breaststroke leg in the medley and mixed medley relays.
At the 2025 World Aquatics Junior Swimming Championships, Nowacki delivered standout performances: On 20 August, he won the 100 m breaststroke in 59.20 seconds, breaking his own British age group record. On 22 August, he claimed gold in the 200 m breaststroke with a time of 2:07.32, setting a new Championship, British age group, and European junior record.
He defeated Japan's Shin Ohashi in both finals, who holds the World Junior Record in the 100 m breaststroke.
During the 2026 Commonwealth Games, Nowacki won Jersey's first medal since 1990 with a silver in the 100m breaststroke. During the same event, Nowacki won a gold in the 200m breaststroke with a time of 2:07.87, becoming Jersey's most decorated athlete at the commonwealth games and winning Jersey's first gold medal since 1990.
In August 2026, during the 2026 European Aquatics Championships, Nowacki won a gold medal in the 200m breaststroke with a time of 2:07.70.
Records As of August 2025, Nowacki holds: British age group record (17 years) – 100 m breaststroke: 59.20 British age group record (17 years) – 200 m breaststroke: 2:07.32 European junior record – 200 m breaststroke: 2:07.32
Personal life Nowacki was born in Jersey to Polish parents. He represents Great Britain in international competitions, and Jersey at the Island Games and the Commonwealth and Commonwealth Youth Games. He is known for his strong back-half splits and tactical race execution, particularly in the 200 m breaststroke.
Personal bests + Long course (50 m pool) Event Time Date Location 100 m breaststroke 59.20 20 August 2025 Otopeni, Romania 200 m breaststroke 2:07.32 22 August 2025 Otopeni, Romania
Achievements Double gold medalist – 2025 World Junior Championships (100 m & 200 m breaststroke) Quadruple gold medalist – 2025 European Junior Championships (100 m & 200 m breaststroke, medley relay & mixed medley relay) Eight-time gold medalist - 2025 Island Games (50 m, 100m, & 200 m breaststroke, 50 m & 100 m butterfly, 100 m & 200 m individual medley, medley relay) Silver medalist – 2023 EYOF (200 m breaststroke) Silver medalist – 2023 Commonwealth Youth Games (50 m & 100 m breaststroke) Silver medalist – 2026 Commonwealth Games (100 m breaststroke) Gold medalist – 2026 Commonwealth Games (200 m breaststroke) Gold medalist - 2026 European Aquatics Championships (200 m breaststroke)
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