My buddy Eduardo and me returned to Pavilion Lake for 2 days and 4 tanks on July 10-11. One of my goals was to pinpoint the location for a dive float/descent line directly to the massive microbialite structures sitting on the bottom in 23m of fresh water.
So, for your future reference, you can navigate to the descent point by following a South heading along a line that starts from the "No Camping" sign and passes tangentially by the eastern edge of the island. See the pics below:
The air temperature was about 37C, people were swimming in 20C surface waters, and bather's were a little amazed to see us put on long underwear, fleecy snowsuits and then climb into drysuits before entering the lake to cool off. But the water temperature at depth was 8C, which is about the same as it is in the ocean around Vancouver in the winter time.
Here's a link to the video.