| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:49.75 | Western Region Long Course Championships | 2025-06-13 |
| 100m Backstroke | 1:39.12 | GHAC Winter Invitational SCM | 2026-03-06 |
| 100m Breaststroke | 1:54.46 | MAC Rising Star #2 | 2025-05-30 |
| 100m Breaststroke | 1:47.24 | Western Region Short Course Championships | 2026-02-12 |
| 100m Freestyle | 1:31.48 | MAC Rising Star #2 | 2025-05-30 |
| 100m Freestyle | 1:23.21 | Western Region Short Course Championships | 2026-02-12 |
| 100m IM | 1:40.87 | Dean Boles Invitational Meet | 2026-01-10 |
| 200m Backstroke | 3:23.68 | Western Region Short Course Championships | 2026-02-12 |
| 200m Breaststroke | 3:58.39 | Dean Boles Invitational Meet | 2026-01-10 |
| 200m Freestyle | 2:51.73 | GHAC Winter Invitational SCM | 2026-03-06 |
| 200m IM | 3:28.73 | GHAC Winter Invitational SCM | 2026-03-06 |
| 400m Freestyle | 6:55.60 | David Lawson Invitational 2026 | 2026-01-23 |
| 50m Backstroke | 48.23 | MAC Rising Star #2 | 2025-05-30 |
| 50m Backstroke | 45.43 | Dean Boles Invitational Meet | 2026-01-10 |
| 50m Breaststroke | 53.28 | MAC Rising Star #2 | 2025-05-30 |
| 50m Breaststroke | 48.49 | Western Region Short Course Championships | 2026-02-12 |
| 50m Freestyle | 40.46 | MAC Rising Star #2 | 2025-05-30 |
| 50m Freestyle | 36.39 | GHAC Winter Invitational SCM | 2026-03-06 |
Walter, Nikolai's top personal bests include 100m Backstroke (1:49.75), 100m Backstroke (1:39.12), 100m Breaststroke (1:54.46), 100m Breaststroke (1:47.24), 100m Freestyle (1:31.48).
Walter, Nikolai swims for Region of Waterloo Swim Club.
Walter, Nikolai has competed in 6 meets.