The basic results of the Lake Hovsgol hydrophysical characters mapping with AVHRR (Advanced Very High Resolution Radiometer) data, selected for the longtime period (1999-2012) from archive of telemetry of the Center of space monitoring of Institute of solar-terrestrial physics of the Siberian Branch of the Russian Academy of Science, have been discussed in this paper. The mapping and analysis of distribution of water surface temperatures and stages of destruction of a snow-ice cover within water areas of the Lake Hovsgol have been carried out in this study.