We are pleased to announce that the latest release of the i-Boating application includes support for lake temperature (Thermocline) maps for inland lakes in US & Canada. The maps show variation in temperature accurate to 1 degree Fahrenheit (0.5 degree celsius).
With the layer on, its easy to eyeball warm zones in a lake and temperature breaklines that tend to be very productive for fishing. It is available on all platforms (iOS, Android, Windows & MacOS).
You can also view lake temperature maps online.