The study aimed to identify the predictive ability of the family climate in the emotional regulation of eleventh grade students in Muscat Governorate. The study sample consisted of (500) male and female students from the eleventh grade in government schools in the state of Matrah. The study applied the descriptive correlational method. Family climate scale and the emotional regulation scale were used. The study results showed that the family climate level among eleventh-grade students in Muscat governorate was average in all dimensions, except for family cohesion, which was high. The emotional regulation level in the overall score and in the re-evaluation and expressive suppression is moderate. There are statistically significant differences in the overall score of emotional regulation dimensions attributed to gender, and there is no statistical significance in the gender-related expressive suppression. On the other hand, it found statistical significance in the dimension of re-evaluation in favor of females. There is no statistical significance in the overall score of emotional regulation dimensions attributed to the individual's position within the family, and there were statistically significant differences in the mean of expression suppression between early birth order and late birth order, in favor of the late birth order. In addition, the results indicated a statistically significant positive correlation between emotional regulation and family climate. Family climate explains 10 % of the variance in the emotional regulation. The study also resulted in a set of recommendations.