| Open water swimming at the 2025 SEA Games | |
|---|---|
 | |
| Venue | Jomtien Beach Samae Beach, Ko Lan |
| Location | Chonburi, Thailand |
| Dates | 18-20 December 2025 |
| Competitors | 29 from 6 nations |
Open water swimming competitions at the 2025 SEA Games took place at Jomtien Beach and Samae Beach in Chonburi, Thailand from 18 to 20 December 2025. Medals were awarded in 3 events. [1]
* Host nation (Thailand)
| Rank | Nation | Gold | Silver | Bronze | Total |
|---|---|---|---|---|---|
| 1 |  Thailand* | 2 | 0 | 1 | 3 |
| 2 |  Vietnam | 1 | 1 | 1 | 3 |
| 3 |  Singapore | 0 | 2 | 1 | 3 |
| Totals (3 entries) | 3 | 3 | 3 | 9 | |
| Event | Gold | Silver | Bronze | |||
|---|---|---|---|---|---|---|
| Men's 10 kilometre | Thammananthacothe Ratthawit Thailand | 1:56:37 | Mai Tran Tuan Anh Vietnam | 1:56:38 | Artyom Lukasevits Singapore | 1:56:41 |
| Women's 10 kilometre | Kwanmuang Kamonchanok Thailand | 2:06:30 | Liew Li Shan Chantal Singapore | 2:06:35 | Vo Thi My Tien Vietnam | 2:11:17 |
| Mixed relay | Vietnam Kha Nhi Nguyen Vo Thi My Tien Huy Hoang Nguyen Tran Tuan Anh Mai | 1:12:18 | Singapore Ona Kate Russel Pang Timothy Cheah Jing Fu Gan Ching Hwee | 1:12:53 | Thailand Chothistayanggoon Kittinun Kwanmuang Kamonchanok Charoensup Thitirat Thammananthacothe Ratthawit | 1:14:27 |
