| Women's 100 metre breaststroke at the 2025 SEA Games | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Venue | SAT Swimming Pool | |||||||||
| Date | 13 December | |||||||||
| Competitors | 11 from 7 nations | |||||||||
| Winning time | 1:06.79 | |||||||||
| Medalists | ||||||||||
| ||||||||||
The women's 100 metre breaststroke event at the 2025 SEA Games took place on 13 December 2025 at the SAT Swimming Pool in Bangkok, Thailand.
All times are Indochina Standard Time (UTC+07:00)
| Date | Time | Event |
|---|---|---|
| Saturday, 13 December 2025 | 9:31 | Heats |
| 19:05 | Final |
Prior to this competition, the existing world, Asian, and Southeast Asian Games records were as follows.
| World Record |  Lilly King (USA) | 1:04.13 | Budapest, Hungary | 25 July 2017 |
| Asian Record |  Tang Qianting (CHN) | 1:04.39 | Shenzhen, China | 21 April 2024 |
| Games Record |  Letitia Sim (SGP) | 1:07.94 | Phnom Penh, Cambodia | 9 May 2023 |
| Rank | Heat | Lane | Swimmer | Nationality | Time | Notes |
|---|---|---|---|---|---|---|
| 1 | 2 | 4 | Letitia Sim | Singapore | 1:08.73 | Q |
| 2 | 2 | 5 | Thitirat Inchai |  Thailand | 1:10.36 | Q, NR |
| 3 | 1 | 4 | Phee Jinq En |  Malaysia | 1:10.99 | Q |
| 4 | 1 | 5 | Phiangkhwan Pawapotako | Thailand | 1:11.27 | Q |
| 5 | 2 | 6 | Adellia |  Indonesia | 1:11.56 | Q |
| 6 | 2 | 3 | Thúy Hiền Nguyễn |  Vietnam | 1:11.95 | Q |
| 7 | 1 | 2 | Angelina Bella Messina |  Laos | 1:12.33 | Q |
| 8 | 1 | 3 | Elle Nicole Tay Jiaqi | Singapore | 1:12.77 | Q |
| 9 | 1 | 6 | Isabelle Chiyi Buckley | Malaysia | 1:15.90 | R |
| 10 | 2 | 2 | Kaylonie Amphonesuh | Laos | 1:19.26 | R |
| 11 | 2 | 7 | Poe Tharr Ngwe Chi |  Myanmar | 1:23.30 |
| Rank | Lane | Swimmer | Nationality | Time | Notes |
|---|---|---|---|---|---|
 | 4 | Letitia Sim | Singapore | 1:06.79 | GR |
 | 3 | Phee Jinq En | Malaysia | 1:10.09 | |
 | 7 | Thúy Hiền Nguyễn | Vietnam | 1:10.40 | NR |
| 4 | 6 | Phiangkhwan Pawapotako | Thailand | 1:10.42 | |
| 5 | 5 | Thitirat Inchai | Thailand | 1:10.58 | |
| 6 | 2 | Adellia | Indonesia | 1:10.92 | |
| 7 | 8 | Elle Nicole Tay Jiaqi | Singapore | 1:12.16 | |
| 8 | 1 | Angelina Bella Messina | Laos | 1:12.29 | NR |