The schedule for the summer semester is published! You can find the schedule here: https://www.campussport.fi/en/selection-of-sports/liikunta-aikataulu-en/
You will find the schedule by setting SUMMER 2019 as a location. Click the name of the class/shift to see the location and the workout description. The summer schedule is valid from May 2 until June 16. The gyms at Asa, Formis, Educarium and Roddis are open the whole summer. The gym at Ruiskatu is closed June 1 – Sep 1.
It is now possible to pay the fee (33€) for the summer semester at the online store of CampusSport. Enrollment for the courses with separate fees (you recognize them from a C abbreviation) starts on Apr 15 at 2 pm.