| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:14.16 | Unknown Meet 2022-07-10 | 2022-07-10 |
| 100m Backstroke | 1:12.18 | Unknown Meet 2022-11-05 | 2022-11-05 |
| 100m Breaststroke | 1:33.14 | Import - Barrie (ON) Mar 2023 | 2023-03-04 |
| 100m Butterfly | 1:33.14 | Import - Barrie (ON) Mar 2023 | 2023-03-04 |
| 100m Freestyle | 1:03.22 | Unknown Meet 2024-05-25 | 2024-05-25 |
| 100m Freestyle | 1:04.84 | Unknown Meet 2025-01-19 | 2025-01-19 |
| 100m IM | 1:20.23 | OUA Sprint Invitational - Semis Results | 2025-10-18 |
| 100m Medley | 1:33.14 | Import - Barrie (ON) Mar 2023 | 2023-03-04 |
| 1500m Freestyle | 21:43.89 | Unknown Meet 2019-07-04 | 2019-07-04 |
| 1500m Freestyle | 19:39.87 | Unknown Meet 2023-12-14 | 2023-12-14 |
| 200m Backstroke | 2:44.38 | Unknown Meet 2023-07-15 | 2023-07-15 |
| 200m Backstroke | 2:33.75 | Unknown Meet 2022-11-06 | 2022-11-06 |
| 200m Freestyle | 2:26.10 | Unknown Meet 2024-07-27 | 2024-07-27 |
| 200m Freestyle | 2:21.22 | Unknown Meet 2024-07-20 | 2024-07-20 |
| 400m Freestyle | 5:08.06 | Unknown Meet 2024-07-26 | 2024-07-26 |
| 400m Freestyle | 5:06.30 | Unknown Meet 2025-01-19 | 2025-01-19 |
| 50m Backstroke | 33.91 | Unknown Meet 2024-07-28 | 2024-07-28 |
| 50m Backstroke | 33.74 | Import - Barrie (ON) Mar 2023 | 2023-03-04 |
| 50m Breaststroke | 42.70 | Import - Barrie (ON) Mar 2023 | 2023-03-04 |
| 50m Butterfly | 33.67 | Walker Invitational | 2025-10-25 |
| 50m Freestyle | 29.68 | Unknown Meet 2024-07-26 | 2024-07-26 |
| 50m Freestyle | 29.44 | Unknown Meet 2023-12-17 | 2023-12-17 |
| 800m Freestyle | 10:30.69 | Unknown Meet 2024-05-02 | 2024-05-02 |
Shemilt, Grace's top personal bests include 100m Backstroke (1:14.16), 100m Backstroke (1:12.18), 100m Breaststroke (1:33.14), 100m Butterfly (1:33.14), 100m Freestyle (1:03.22).
Shemilt, Grace swims for Brock Niagara Aquatics.
Shemilt, Grace has competed in 39 meets.