| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:46.34 | RHAC Fall Classic 2025 | 2025-10-24 |
| 100m Breaststroke | 1:46.40 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m Butterfly | 1:38.62 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m Freestyle | 1:26.17 | 2025 Alan Swanston Classic | 2025-12-05 |
| 100m IM | 1:41.50 | 2025 BTSC Trojan Cup | 2025-12-12 |
| 200m Backstroke | 3:44.37 | 2025 Alan Swanston Classic | 2025-12-05 |
| 200m Breaststroke | 3:57.41 | 2025 BTSC Trojan Cup | 2025-12-12 |
| 200m Freestyle | 3:07.80 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 200m IM | 3:21.76 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 50m Backstroke | 47.93 | RHAC Fall Classic 2025 | 2025-10-24 |
| 50m Breaststroke | 50.22 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 50m Butterfly | 40.77 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 50m Freestyle | 40.61 | RHAC Fall Classic 2025 | 2025-10-24 |
Tam, Joshua's top personal bests include 100m Backstroke (1:46.34), 100m Breaststroke (1:46.40), 100m Butterfly (1:38.62), 100m Freestyle (1:26.17), 100m IM (1:41.50).
Tam, Joshua swims for Newmarket Stingrays Swim Club.
Tam, Joshua has competed in 5 meets.