Cherry Beach is one of Toronto's cleanest!
The Blue Flag Program has strict standards that Cherry Beach has followed for the last few years.

As the TWC is located in the waterfront park next to Cherry Beach, there are only a few occasions during the summer that the beach is considered unsafe for swimming. This usually only happens after a heavy rainfall that brings runoff from the Don River through the eastern gap and into Lake Ontario and past Cherry Beach. Depending on the temperature and wind / wave direction, polluted water may be pushed back then into Cherry Beach.
Beach water quality hotline can be called at 416 392-7161
Please check the city website
http://www.torontobeach.ca/beaches/waterquality_check.jsp
You will also find water quality tests from the past few years there.
2007-2008/06/13 Cherry Beach water quality results can be found at
cherrybeach07-08waterquality.pdf
Make your own informed decision before windsurfing. Click
here
for an overview of Learn to Windsurf lessons and water quality explained.
Weather forecasts are available from many sites and on marine weather radio stations. Check possible changing weather conditions before you go windsurfing, so that conditions are right for you and don't exceed your abilities. We recommend using the buddy system, whenever windsurfing.