>>1507024It really depends. Smaller and/or shallower lakes will heat up faster than deep and big lakes. Rivers usually match water temp with ground temp much closer than lakes do. North sides of lakes warm faster. My method of approximating water temp of places far away is just experience. I pick one body of water that is close by to use as a standard. If lake X is this temperature, usually at this time lake Y is warmer and Z is colder. Stuff like that. If you dont have local forums that's the best you can do because unless a bait shop on the water reports it (usually rarely updated or accurate anyway).