The goal of this paper is to show possibilities of multidisciplinary approach to the bioclimatic research in tourism, particularly in the spa tourism. In addition to the treatment of various diseases with thermal and mineral water, mud, gas and healing climate, modern spa also implies their importance in disease prevention and more often in recreation. The idea of the paper is to present how weather can be evaluated for recreational needs in the spa resorts. The results show biothermal weather classification for recreation based on the outdoor human heat balance. In this analysis, daily meteorological data (meteorological station of Doboj) were used for two extreme months, January and July. Town of Doboj was taken for analysis because there is a spa resorts in its vicinity.
