The article presents the possibilities of forecasting national security in the form of an ordered methodology, based on two fundamental pillars. The first is to specify the operational definition of national security. The second is expressed in synthetic measures of the power of states. The operational definition of national security includes components that are the subject of forecasting, using specific methods. These are: the power ratio of the parties under consideration, mutual contradiction of interests, propensity to aggression, propensity to defend themselves and the nature of the international environment. This approach enables a quantitative assessment of its level as well as quantitative and qualitative forecasting.