| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:09.36 | 2026 Huronia SC Regional Championships | 2026-02-06 |
| 100m Breaststroke | 1:22.51 | 2026 Huronia SC Regional Championships | 2026-02-06 |
| 100m Freestyle | 1:00.78 | 2026 Huronia SC Regional Championships | 2026-02-06 |
| 100m IM | 1:10.46 | 2026 Trojan Pentathlon | 2026-03-06 |
| 200m Freestyle | 1:41.28 | Otters Spooky Splash 2025 | 2025-10-24 |
| 50m Backstroke | 31.01 | 2026 Huronia SC Regional Championships | 2026-02-06 |
| 50m Breaststroke | 36.25 | 2026 Trojan Pentathlon | 2026-03-06 |
| 50m Butterfly | 30.02 | 2026 Huronia SC Regional Championships | 2026-02-06 |
| 50m Freestyle | 26.88 | Otters Devo & Distance Winter Waves | 2026-01-24 |
Langlois, Seth's top personal bests include 100m Backstroke (1:09.36), 100m Breaststroke (1:22.51), 100m Freestyle (1:00.78), 100m IM (1:10.46), 200m Freestyle (1:41.28).
Langlois, Seth swims for Orangeville Otters Swim Club.
Langlois, Seth has competed in 7 meets.