| Men's 100 metre breaststroke at the 2025 SEA Games | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Venue | SAT Swimming Pool | |||||||||
| Date | 11 December | |||||||||
| Competitors | 10 from 7 nations | |||||||||
| Winning time | 1:01.46 | |||||||||
| Medalists | ||||||||||
| ||||||||||
The men's 100 metre breaststroke event at the 2025 SEA Games took place on 11 December 2025 at the SAT Swimming Pool in Bangkok, Thailand.
All times are Indochina Standard Time (UTC+07:00)
| Date | Time | Event |
|---|---|---|
| Wednesday, 11 December 2025 | 9:28 | Heats |
| 19:02 | Final |
Prior to this competition, the existing world, Asian, and Southeast Asian Games records were as follows.
| World Record |  Adam Peaty (USA) | 56.88 | Gwangju, South Korea | 20 June 2022 |
| Asian Record |  Qin Haiyang (CHN) | 57.69 | Fukuoka, Japan | 24 July 2023 |
| Games Record |  Phạm Thanh Bảo (VIE) | 1:00.97 | Phnom Penh, Cambodia | 7 May 2023 |
| Rank | Heat | Lane | Swimmer | Nationality | Time | Notes |
|---|---|---|---|---|---|---|
| 1 | 1 | 4 | Chan Chun Ho |  Singapore | 1:02.21 | Q |
| 2 | 2 | 3 | Maximillian Ang | Singapore | 1:02.52 | Q |
| 3 | 2 | 4 | Phạm Thanh Bảo | Vietnam | 1:03.16 | Q |
| 4 | 2 | 6 | Rachasil Mahamongkol |  Thailand | 1:03.27 | Q |
| 5 | 1 | 5 | Muhammad Dwiky Raharjo |  Indonesia | 1:03.53 | Q |
| 6 | 2 | 5 | Andrew Goh |  Malaysia | 1:03.75 | Q |
| 7 | 1 | 3 | Thanonchai Janruksa | Thailand | 1:04.63 | Q |
| 8 | 1 | 2 | Steven Insixiengmay |  Laos | 1:04.76 | Q |
| 9 | 1 | 6 | Khant Phone Min |  Myanmar | 1:12.39 | R |
| 10 | 2 | 7 | Thu Lin Myat | Myanmar | 1:12.90 | R |
| Rank | Lane | Swimmer | Nationality | Time | Notes |
|---|---|---|---|---|---|
 | 3 | Phạm Thanh Bảo | Vietnam | 1:01.43 | |
 | 4 | Chan Chun Ho | Singapore | 1:01.72 | |
 | 5 | Maximillian Ang | Singapore | 1:02.35 | |
| 4 | 2 | Muhammad Dwiky Raharjo | Indonesia | 1:02.61 | |
| 5 | 7 | Andrew Goh | Malaysia | 1:03.24 | |
| 6 | 6 | Rachasil Mahamongkol | Thailand | 1:03.45 | |
| 7 | 8 | Steven Insixiengmay | Laos | 1:04.61 | |
| 8 | 1 | Thanonchai Janruksa | Thailand | 1:04.85 |