The meaning is ambiguous - do you mean
1. "I will be able to (do the activity) swimming this summer (because I have no access to the pool now)? or
2. "I will become capable of swimming by the time summer arrives (because I don't know how to swim now and thus I'm currently training to swim)?
For 1, it's 夏天到我就能夠去遊泳池游泳了。
For 2, it's 夏天到我就學會游泳了。
be able to 能