| Women's 800 metre freestyle at the 2025 SEA Games | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Venue | SAT Swimming Pool | |||||||||
| Date | 15 December | |||||||||
| Competitors | 10 from 8 nations | |||||||||
| Winning time | 8:33.13 | |||||||||
| Medalists | ||||||||||
| ||||||||||
The Women's 800 metre freestyle event at the 2025 SEA Games took place on 15 December 2025 at the SAT Swimming Pool in Bangkok, Thailand.
All times are Indochina Standard Time (UTC+07:00)
| Date | Time | Event |
|---|---|---|
| Monday, 15 December 2025 | 18:23 | Final |
Prior to this competition, the existing world, Asian and Games records were as follows.
| World Record |  Katie Ledecky (USA) | 8:04.12 | Victoria, Canada | 3 May 2025 |
| Asian Record |  Li Bingjie (CHN) | 8:13.31 | Fukuoka, Japan | 29 July 2023 |
| Games Record |  Nguyễn Thị Ánh Viên (VIE) | 8:34.85 | Singapore, Singapore | 6 June 2015 |
| Rank | Heat | Lane | Swimmer | Nationality | Time | Notes |
|---|---|---|---|---|---|---|
 | 2 | 4 | Gan Ching Hwee |  Singapore | 8:33.13 | GR |
 | 2 | 3 | Võ Thị Mỹ Tiên | Vietnam | 8:49.02 | |
 | 2 | 5 | Kamonchanok Kwanmuang |  Thailand | 8:52.17 | |
| 4 | 2 | 6 | Nguyễn Khả Nhi | Vietnam | 8:54.51 | |
| 4 | 2 | 2 | Thitirat Charoensup | Thailand | 9:05.35 | |
| 6 | 2 | 1 | Victoria Carrie Lim Yiyan | Singapore | 9:08.73 | |
| 7 | 2 | 7 | Izzy Dwifaiva Hefrisyanthi |  Indonesia | 9:11.26 | |
| 8 | 1 | 5 | Kyla Louise Bulaga |  Philippines | 9:30.66 | |
| 9 | 1 | 4 | Tan Rui Nee |  Malaysia | 9:35.39 | |
| 10 | 1 | 3 | Kaylonie Amphonesuh |  Laos | 10:35.48 | NR |