General info

Ragnar has a big, enthusiastic swimming section. We offer four practices a week and join five big swimming tournaments a year! The practices are made so swimmers of every level can join, as long as you have some basic swimming skills. Each lane has its own level. In the first one, swimmers learn the basics of every stroke, and in the fastest lane you will find swimmers who have swum their whole lives.

Would you like to come and try a free practice? Send an e-mail to our swimming commisioner (, so that we can agree upon a date on which you can attend a practice!


During the season, Ragnar competes in five student swimming competitions (called NSZKs and ONKS). The NSZK competitions are held amongst the 12 universities’ teams in different cities in the Netherlands. The ONKS consist of a regular competition accessible to all students in the Netherlands. Every competition starts on Friday with a social drink. On Saturday, we compete in the water. After that, we all have dinner together. We finish the weekend with a big party. Depending on the distance where the competition takes place, we either sleep in Rotterdam or in the hosting city. 

All competitions of the season 2023-2024:

  • NSZK I – Utrecht – 6-7 October 2023
  • NSZK II – Delft – 1-2 December 2023
  • ONKS – Eindhoven – 23-24 February 2024
  • NSZK III – Leiden – 19-20 April 2023
  • NSZK IV –  Maastricht 28-29 June 2024

Click here for more information about the practices or results of the competitions. You will find the rules here.

If you have any questions or remarks you can contact our swimming commissioner via