[en] Presented are experimental data on simultaneous measurement of temperature profiles and local vapour contents near heat-transfer surface at water pool boiling at the atmosphere pressure near the heat-transfer surface. There is a zone with a relatively small value of vapour content, the maximum value of which is achieved at some distance from the heat-transfer surface. With the increase of heat flux this height decreases. In the region of the developed nucleate boiling the heat transfer coefficient and the thickness of an overheated liquid layer close to the heat-transfer surface are connected by the functional dependence