2018 Marathon Swimming World Series
| Host City |
Beau Vallon Beach |
| Country |
 SEY |
| Held |
20 May 2018 |
| Competitors |
6 |
| Countries |
4 |
Events
| Event |
Gender |
Held |
Status |
Competitors |
Countries |
| 10 km |
Men |
— |
Medal |
3 |
3 |
| 10 km |
Women |
— |
Medal |
3 |
2 |
Medal table
| Pos |
Country |
🥇 Gold |
🥈 Silver |
🥉 Bronze |
Total |
| 1 |
Italy |
 ITA |
2 |
0 |
1 |
3 |
| 2 |
Brazil |
 BRA |
0 |
1 |
0 |
1 |
| = |
Great Britain |
 GBR |
0 |
1 |
0 |
1 |
| 4 |
Germany |
 GER |
0 |
0 |
1 |
1 |
Medal winners