Muskoka 70.3 water temp

Does anyone know what the approx. water temp will be during the race on September 13th?

If my memory is working correctly, I seem to recall the temperature as being in the high 60s F last year. I went for a swim with my daughter the day before and she had a sleeveless wetsuit and said her arms were cold. I had on a fullsuit and didn’t notice it as being too cold. Ontario has finally gotten some hot weather this year so if it continues for another week or two I would think that the water will be warmer there this year.

Does anyone know what the approx. water temp will be during the race on September 13th?
when i did the worlds there in '92, morning air temp was 37 and water temp around 59. when i exited the water i cramped in the legs a bit and was cool–even with a sleeveless wet suit.