The swimming competition at the 1963 Summer Universiade took place in Porto Alegre, Brazil.[1]
| 100 m freestyle | 54.4 | 56.4 | 56.8 | ||||
| 400 m freestyle | 4:26.6 | 4:29.5 | 4:31.1 | ||||
| 1500 m freestyle | 18:04.8 | 18:04.9 | 18:20.6 | ||||
| 200 m backstroke | 2:19.9 | 2:22.3 | 2:23.9 | ||||
| 200 m breaststroke | 2:37.2 | 2:42.2 | 2:42.4 | ||||
| 200 m butterfly | 2:16.0 | 2:16.8 | 2:18.6 | ||||
| 4 × 100 m freestyle relay | 3:47.8 | 3:48.7 | 3:49.8 | ||||
| 4 × 100 m medley relay | 4:14.4 | 4:15.2 | 4:18.7 |
| 100 m freestyle | 1:04.4 | 1:05.3 | 1:05.8 | ||||
| 400 m freestyle | 5:07.3 | 5:11.1 | 5:13.8 | ||||
| 100 m backstroke | 1:12.7 | 1:13.3 | 1:16.3 | ||||
| 200 m breaststroke | 2:54.9 | 2:59.8 | 3:12.0 | ||||
| 100 m butterfly | 1:10.4 | 1:14.0 | 1:15.6 | ||||
| 4 × 100 m freestyle relay | 4:25.0 | 5:03.7 | 5:13.7 | ||||
| 4 × 100 m medley relay | 4:52.6 | 5:23.0 | 5:55.1 |