Find out by informing at your local University board on what the possibilities for you are. You could always decide to do off-campus activities if you find it more convenient to do so. You’ll see the occasional rowing races being held on the Thames River. Don’t worry it’s not only intended for the professionals.
Numerous marinas give you the possibility to rent you a rowing outfit and there you go. On the other side if you’re more into watching sports, try checking out Wimbledon and it’s world famous tennis championships being held each year.