Pool temperature rise = mass of water x (heat added by solar heater + heat added by sun on water - heat lost by evaporation - heat lost to conduction (dirt) - radiative heat loss at night) . The ONLY one of those 5 factors that can be easily determined is the mass of water in your pool (~94,000 lbs or ~43,000 kg).
That's a long-winded way of saying, I don't know the answer to your question, and can't calculate it -- even if you gave me all the relevant weather data, your latitude; the surface area of the solar collector; the circulation set up on your heater; your ground temperature, and more.
The BEST way to answer the question is to try it and see . . . if you keep some records, after a couple of years, you should be able to predict heat rise your self.
Bookmarks