| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:42.01 | Scar Pan Am Winter Classic | 2026-01-16 |
| 100m Backstroke | 1:35.41 | BAC Team Showdown 2025 | 2025-12-12 |
| 100m Breaststroke | 1:44.93 | ROC Fall Invitational | 2025-11-22 |
| 100m Butterfly | 1:41.19 | Scar Pan Am Winter Classic | 2026-01-16 |
| 100m Butterfly | 1:34.11 | BAC Team Showdown 2025 | 2025-12-12 |
| 100m Freestyle | 1:16.48 | Scar Pan Am Winter Classic | 2026-01-16 |
| 100m Freestyle | 1:14.75 | BAC Team Showdown 2025 | 2025-12-12 |
| 100m IM | 1:42.66 | CCSC June Invitational | 2025-06-21 |
| 200m Backstroke | 3:28.04 | 2025 OSHAC Fall Invitational | 2025-11-01 |
| 200m Breaststroke | 4:19.11 | PICK Last Gasp 2025 | 2025-06-07 |
| 200m Freestyle | 2:47.13 | Scar Pan Am Winter Classic | 2026-01-16 |
| 200m Freestyle | 2:48.97 | ROC Fall Invitational | 2025-11-22 |
| 200m IM | 3:27.74 | Scar Pan Am Winter Classic | 2026-01-16 |
| 200m IM | 3:23.28 | BAC Team Showdown 2025 | 2025-12-12 |
| 400m Freestyle | 5:56.75 | Scar Pan Am Winter Classic | 2026-01-16 |
| 400m Freestyle | 5:43.68 | ROC Fall Invitational | 2025-11-22 |
| 50m Backstroke | 45.90 | 2025 PTBO Fall Invitational | 2025-10-18 |
| 50m Breaststroke | 55.85 | Scar Pan Am Winter Classic | 2026-01-16 |
| 50m Butterfly | 44.26 | Scar Pan Am Winter Classic | 2026-01-16 |
| 50m Butterfly | 39.55 | ROC Fall Invitational | 2025-11-22 |
| 50m Freestyle | 35.33 | Scar Pan Am Winter Classic | 2026-01-16 |
| 50m Freestyle | 34.31 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
Heffernan, Jessica's top personal bests include 100m Backstroke (1:42.01), 100m Backstroke (1:35.41), 100m Breaststroke (1:44.93), 100m Butterfly (1:41.19), 100m Butterfly (1:34.11).
Heffernan, Jessica swims for Clarington Swim Club.
Heffernan, Jessica has competed in 9 meets.