| Su 26 May | | |  | HZS |
100 Jaar Kon. Hasselse Zwemver. Spartacus te Hasselt Limburg 2013 (25m, 6l) | | Federal |
| Sa 25 May | | | | HZS |
100 Jaar Kon. Hasselse Zwemver. Spartacus te Hasselt Limburg 2013 (25m, 6l) | | Federal |
| Mo 20 May | | |  | KBZB/FRBN/BRABO |
Belgische Open kampioenschappen te Antwerpen 2013 (50m, 8l) | | National |
| Su 19 May | | | | KBZB/FRBN/BRABO |
Belgische Open kampioenschappen te Antwerpen 2013 (50m, 8l) | | National |
| Sa 18 May | | |  | SHARK |
4e Memorial Fons Brydenbach te Herentals Antwerpen 2013 (25m, 6l) | | District |
| | | | KBZB/FRBN/BRABO |
Belgische Open kampioenschappen te Antwerpen 2013 (50m, 8l) | | National |
| Su 12 May | | | | VZF/BRABO |
Antwerp Diamond Speedo Race at Antwerp 2013 (50m, 8l) | | International |
| Sa 11 May | | | | VZF/BRABO |
Antwerp Diamond Speedo Race at Antwerp 2013 (50m, 8l) | | International |
| Sa 04 May | | | | GOLD |
GOLD Lentecriterium te Zwevegem West-Vlaanderen 2031 (50m, 8l) | | National |
| We 01 May | | | | ESN |
Finales Dauven à Seraign LNL 2013 (50m, 8l) | | National |
