| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:08.95 | East Coast Championships | 2025-07-10 |
| 100m Backstroke | 1:01.47 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 100m Breaststroke | 1:30.22 | 2026 AAA #2 LC Invitational | 2026-02-21 |
| 100m Butterfly | 1:03.64 | East Coast Championships | 2025-07-10 |
| 100m Butterfly | 59.60 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 100m Freestyle | 1:00.18 | East Coast Championships | 2025-07-10 |
| 100m IM | 1:10.69 | 2025 DAL Sprint Meet | 2025-10-19 |
| 200m Backstroke | 2:36.13 | AAA LCM #3 | 2025-05-23 |
| 200m Butterfly | 2:36.45 | AAA LCM #3 | 2025-05-23 |
| 200m Butterfly | 2:27.69 | 2025 Candy Cane Invitational | 2025-12-12 |
| 200m Freestyle | 2:17.79 | 2026 AAA #2 LC Invitational | 2026-02-21 |
| 200m IM | 2:35.76 | 2026 AAA #2 LC Invitational | 2026-02-21 |
| 50m Backstroke | 30.65 | 2026 AAA #1 LC Invitational | 2026-01-30 |
| 50m Backstroke | 27.72 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 50m Breaststroke | 41.55 | 2026 AAA #2 LC Invitational | 2026-02-21 |
| 50m Breaststroke | 38.23 | 2025 DAL Sprint Meet | 2025-10-19 |
| 50m Butterfly | 27.70 | East Coast Championships | 2025-07-10 |
| 50m Butterfly | 26.65 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 50m Freestyle | 27.08 | East Coast Championships | 2025-07-10 |
| 50m Freestyle | 27.45 | 2025 DAL Sprint Meet | 2025-10-19 |
Fanning, Seamus's top personal bests include 100m Backstroke (1:08.95), 100m Backstroke (1:01.47), 100m Breaststroke (1:30.22), 100m Butterfly (1:03.64), 100m Butterfly (59.60).
Fanning, Seamus swims for Pictou County Mariners.
Fanning, Seamus has competed in 9 meets.