The effects of global climate change are visible across the planet, in all its ecosystems. Their influence will become more and more pronounced in the coming decades. Global climate change also has a major impact on forest ecosystems and thus on forestry. Spruce is a very sensitive woody plant that may have a problem to adapt to in the future. At present it is visible in its presence in the forests of Slovakia, which has been declining for a long time, mainly due to the effects of abiotic and biotic harmful agents and also to the deterioration of its health condition. The forestry will have to cope with this phenomenon. It is necessary to know how spruce responds to climate change, especially changes in temperature and precipitation. The reactions are expected to be different at different altitudes and regions of Slovakia. The impact of changes in rainfall and temperature on spruce growth in the regions of Orava and Smolník for altitudes to the 800 m a.s.l. and above 800 m a.s.l was investigated in the thesis. The results show that spruce stands in both regions at lower altitudes show a decreasing growth rate than high altitude stands, a change from the past when the growth rate at the lower positions was higher.