Male Professionals
TOP 10 Swim Times of 2019
without current-assisted swim courses
| Rank | Name | Nation | Actual Time | Race |
| 1 | Thomas Davis | GBR | 00:43:38 | Challenge Anhui on 2019-10-20 |
| 2 | Alexander Berggren | SWE | 00:43:50 | IM Sweden on 2019-08-17 |
| 3 | Lukasz Wojt | GER | 00:44:30 | IM Italy on 2019-09-21 |
| 4 | Matt Franklin | NZL | 00:44:44 | IM Australia on 2019-05-05 |
| 5 | Denis Chevrot | FRA | 00:44:44 | IM Australia on 2019-05-05 |
| 6 | Clayton Fettell | AUS | 00:44:46 | IM Australia on 2019-05-05 |
| 7 | Mark Bowstead | NZL | 00:44:47 | IM Australia on 2019-05-05 |
| 8 | James Davy | AUS | 00:44:48 | IM Australia on 2019-05-05 |
| 9 | Tim Reed | AUS | 00:44:53 | IM Australia on 2019-05-05 |
| 10 | Mathias Lyngsoe Petersen | DEN | 00:45:27 | IM Sweden on 2019-08-17 |
As noted above, these times are without potentially current-assisted swims. This year, the fastest overall swim including these courses was by Tim O’Donnell with a 39:18 in Cozumel.
TOP 10 Swim Performances of 2019
| Rank | Name | Nation | Normalized Time | Actual Time | Race |
| 1 | Lukasz Wojt | GER | 00:44:59 | 00:45:29 | IM Austria on 2019-07-07 |
| 2 | Lukasz Wojt | GER | 00:45:32 | 00:44:30 | IM Italy on 2019-09-21 |
| 3 | Josh Amberger | AUS | 00:45:49 | 00:47:28 | IM Hawaii on 2019-10-12 |
| 4 | Jan Frodeno | GER | 00:45:52 | 00:47:31 | IM Hawaii on 2019-10-12 |
| 5 | Alistair Brownlee | GBR | 00:45:54 | 00:47:33 | IM Hawaii on 2019-10-12 |
| 6 | Daniel Baekkegard | DEN | 00:45:56 | 00:47:35 | IM Hawaii on 2019-10-12 |
| 7 | Timothy O’Donnell | USA | 00:45:59 | 00:47:38 | IM Hawaii on 2019-10-12 |
| 8 | Maurice Clavel | GER | 00:46:01 | 00:47:40 | IM Hawaii on 2019-10-12 |
| 9 | Braden Currie | NZL | 00:46:02 | 00:47:41 | IM Hawaii on 2019-10-12 |
| 10 | Jesper Svensson | SWE | 00:46:03 | 00:47:42 | IM Hawaii on 2019-10-12 |
Female Professionals
There’s no surprise that the best female swimmers in 2019 are Lauren Brandon and Lucy Charles-Barclay, but Teresa Adam is also consistently showing strong swims.
TOP 10 Swim Times of 2019
without current-assisted swim courses
| Rank | Name | Nation | Actual Time | Race |
| 1 | Lauren Brandon | USA | 00:48:43 | IM Boulder on 2019-06-09 |
| 2 | Lucy Charles-Barclay | GBR | 00:49:01 | Challenge Roth on 2019-07-07 |
| 3 | Lucy Charles-Barclay | GBR | 00:49:02 | IM Hawaii on 2019-10-12 |
| 4 | Lauren Brandon | USA | 00:49:08 | IM Hawaii on 2019-10-12 |
| 5 | Rebecca Clarke | NZL | 00:49:19 | IM New Zealand on 2019-03-02 |
| 6 | Meredith Kessler | USA | 00:49:22 | IM New Zealand on 2019-03-02 |
| 7 | Teresa Adam | NZL | 00:49:24 | IM New Zealand on 2019-03-02 |
| 8 | Kelsey Withrow | USA | 00:49:28 | IM Australia on 2019-05-05 |
| 9 | Caroline Steffen | SUI | 00:49:32 | IM Australia on 2019-05-05 |
| 10 | Pamella Oliveira | BRA | 00:49:53 | IM Brasil on 2019-05-26 |
As noted above, these times are without potentially current-assisted swims. This year, the fastest overall swim including these courses was by Carrie Lester with a 45:35 in Cozumel.
TOP 10 Swim Performances of 2019
| Rank | Name | Nation | Normalized Time | Actual Time | Race |
| 1 | Lucy Charles-Barclay | GBR | 00:47:18 | 00:49:01 | Challenge Roth on 2019-07-07 |
| 2 | Lucy Charles-Barclay | GBR | 00:47:20 | 00:49:02 | IM Hawaii on 2019-10-12 |
| 3 | Lauren Brandon | USA | 00:47:26 | 00:49:08 | IM Hawaii on 2019-10-12 |
| 4 | Lauren Brandon | USA | 00:47:29 | 00:48:43 | IM Boulder on 2019-06-09 |
| 5 | Lauren Brandon | USA | 00:48:59 | 00:49:58 | IM Arizona on 2019-11-24 |
| 6 | Rebecca Clarke | NZL | 00:49:49 | 00:49:19 | IM New Zealand on 2019-03-02 |
| 7 | Meredith Kessler | USA | 00:49:52 | 00:49:22 | IM New Zealand on 2019-03-02 |
| 8 | Teresa Adam | NZL | 00:49:54 | 00:49:24 | IM New Zealand on 2019-03-02 |
| 9 | Teresa Adam | NZL | 00:50:22 | 00:50:11 | IM Cairns on 2019-06-09 |
| 10 | Teresa Adam | NZL | 00:51:17 | 00:50:24 | IM Western Australia on 2019-12-01 |