Hello. The only wave worth surfing in town is the so-called Remic wave. It is worth it, smooth and glassy, but the river level is not low enough to allow 'eddy access' (well, walking back up in the middle of the river...). So every time you blow off, you need to land on the Quebec side and walk back up. Typically after 3 times, people call it a day...
As for Beachburg/Forrester Falls, it's always a possibility, but days are getting shorter: in two weeks the Sun will set at 7 pm almost exactly.
--Christian