what is the average temperature of a hot spring
Some Basic Knowledge before You Try Onsen. Hot springs are waters heated by geothermal energy and, in Japan, theyâre practically everywhere. The country is reputed to have over 2,500 onsen; some gush to the surface, while others are reached by tapping subterranean sources more than 1,000 meters underground. Hot spring temperatures vary widely, from nearly 100ÂºC (211ÂºF) to as cool as 20ÂºC (68ÂºF). Everywhere in Japan, visitors will find hotels and traditional inns or day spas with onsen for their enjoyment. The foremost benefits of hot springs bathing are that they warm the body and impart physical and mental relaxation.