| Swimming – Men's 400 metre freestyle at the 2015 SEA Games | ||||||||||
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| Venue | OCBC Aquatic Centre | |||||||||
| Date | 11 June 2015 | |||||||||
| Competitors | 13 from 7 nations | |||||||||
| Medalists | ||||||||||
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The men's 400 metre freestyle competition of the swimming event at the 2015 SEA Games was held on 11 June at the OCBC Aquatic Centre in Kallang, Singapore. [1]
Prior to this competition, the existing Asian and Games records were as follows:
| Asian record |  Sun Yang (CHN) | 3:40.14 | London, Great Britain | 28 July 2012 |
| Games record |  Daniel William Henry Bego (MAS) | 3:53.99 | Vientiane, Laos | 12 December 2009 |
The following records were established during the competition:
| Date | Event | Name | Nationality | Time | Record |
|---|---|---|---|---|---|
| 11 June | Final | Welson Sim Wee Sheng | Malaysia (MAS) | 3:53.97 | GR |
All times are Singapore Standard Time (UTC+08:00)
| Date | Time | Event |
|---|---|---|
| Thursday, 11 June 2015 | 09:12 | Heat 1 |
| 09:16 | Heat 2 | |
| 19:48 | Final |
| KEY: | Q | Qualified | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best | WD | Withdrew | DNF | Did not finish |
The heats were held on 11 June.
Heat 1 was held on 11 June.
| Rank | Lane | Athletes | Time | Notes |
|---|---|---|---|---|
| 1 | 3 |  Pang Sheng Jun (SIN) | 4:03.64 | Q |
| 2 | 4 | Daniel William Henry Bego (MAS) | 4:06.05 | Q |
| 3 | 5 |  Hoàng Quý Phước (VIE) | 4:06.71 | Q |
| 4 | 7 |  Jose Joaquin Gonzalez (PHI) | 4:09.07 | |
| 5 | 2 |  Satrio Bagaskara Gunadi Putra (INA) | 4:09.27 | |
| 6 | 6 |  Sarit Tiewong (THA) | 4:09.38 |
Heat 2 was held on 11 June.
| Rank | Lane | Athletes | Time | Notes |
|---|---|---|---|---|
| 1 | 4 | Welson Sim Wee Sheng (MAS) | 4:02.46 | Q |
| 2 | 7 | Jessie Khing Lacuna (PHI) | 4:03.13 | Q |
| 3 | 6 | Aflah Fadlan Prawira (INA) | 4:03.60 | Q |
| 4 | 3 | Tanakrit Kittiya (THA) | 4:04.14 | Q |
| 5 | 5 | Yeo Kai Quan (SIN) | 4:04.84 | Q |
| 6 | 2 | Lâm Quang Nhật (VIE) | 4:15.63 | |
| 7 | 1 |  Pou Sovijja (CAM) | 4:21.57 |
The final was held on 11 June.
| Rank | Lane | Athletes | Time | Notes |
|---|---|---|---|---|
 | 4 | Welson Sim Wee Sheng (MAS) | 3:53.97 | GR |
 | 5 | Jessie Khing Lacuna (PHI) | 3:55.34 | |
 | 6 | Pang Sheng Jun (SIN) | 3:57.60 | |
| 4 | 1 | Daniel William Henry Bego (MAS) | 3:58.34 | |
| 5 | 8 | Hoàng Quý Phước (VIE) | 3:58.99 | |
| 6 | 2 | Tanakrit Kittiya (THA) | 3:59.13 | |
| 7 | 3 | Aflah Fadlan Prawira (INA) | 4:01.62 | |
| 8 | 7 | Yeo Kai Quan (SIN) | 4:04.64 |
Joseph Isaac Schooling is a Singaporean professional swimmer who specialises in butterfly, freestyle and medley events. He was the gold medalist in the 100m butterfly at the 2016 Olympics, achieving Singapore's first ever Olympic gold medal. His winning time of 50.39s broke multiple records at the National, Southeast Asian, Asian and Olympic levels.
Swimming competitions at the 2015 SEA Games was held at the OCBC Aquatic Centre in the Singapore Sports Hub in Kallang, Singapore from 6 to 11 June 2015. Built only a year earlier, the venue is hosting the SEA Games for the first time. It was used to host the second Southeast Asian Swimming Championships in 2014 as a test bed for the organisers, with the 2015 Southeast Asian Games volunteers hired to also volunteer in the 2014 Swimming Championships to help in the familiarisation of the new venue.
The men's 200 metre freestyle event at the 2015 Southeast Asian Games took place on 6 June 2015 at the OCBC Aquatic Centre in Singapore.
The men's 100 metre freestyle competition of the swimming event at the 2015 SEA Games was held on 7 June at the OCBC Aquatic Centre in Kallang, Singapore.
The men's 100 metre breaststroke competition of the swimming event at the 2015 SEA Games was held on 7 June at the OCBC Aquatic Centre in Kallang, Singapore.
The men's 4 x 200 metre freestyle relay competition of the swimming events at the 2015 SEA Games was held on 7 June at the OCBC Aquatic Centre in Singapore.
The men's 50 metre freestyle competition of the swimming event at the 2015 SEA Games was held on 8 June at the OCBC Aquatic Centre in Kallang, Singapore.
The women's 100 metre freestyle competition of the swimming event at the 2015 SEA Games was held on 8 June at the OCBC Aquatic Centre in Kallang, Singapore.
The women's 200 metre freestyle competition of the swimming event at the 2015 SEA Games was held on 9 June at the OCBC Aquatic Centre in Kallang, Singapore.
The men's 1500 metre freestyle competition of the swimming event at the 2015 SEA Games was held on 10 June at the OCBC Aquatic Centre in Kallang, Singapore.
The women's 400 metre freestyle competition of the swimming event at the 2015 SEA Games was held on 10 June at the OCBC Aquatic Centre in Kallang, Singapore.
The men's 50 metre breaststroke competition of the swimming event at the 2015 SEA Games was held on 11 June at the OCBC Aquatic Centre in Kallang, Singapore.
The women's 50 metre freestyle competition of the swimming event at the 2015 SEA Games was held on 11 June at the OCBC Aquatic Centre in Kallang, Singapore.
The men's 50 metre backstroke competition of the swimming event at the 2015 SEA Games was held on 11 June at the OCBC Aquatic Centre in Kallang, Singapore.
The women's 200 metre breaststroke competition of the swimming event at the 2015 SEA Games was held on 11 June at the OCBC Aquatic Centre in Kallang, Singapore.
The men's 400 metres competition of the athletics event at the 2015 Southeast Asian Games was held on 12 June at the National Stadium in Singapore.
