Background: Mentorship in nursing is a therapeutic relationship that exists between experienced nurses and less experienced nurses to help them gain more knowledge or experience in the profession. Competent nurse mentors aid in facilitating role transitions, improving job satisfaction, enhancing patient care, and decreasing nursing turnover. Aim: The present study aimed to; assess mentorship competencies of nurse mentors at Port Said Healthcare Authority hospitals. Subjects and Method: Design: a descriptive design was used. Setting: the study conducted at seven Healthcare Authority hospitals in Port Said Governorate. Subjects: included a purposive sample of 30 nurse mentors. Tools: Three tools used for data collection consisted of; Mentor knowledge questionnaire, Mentor Competencies Instrument (MCI), and Nurse mentor performance Assessment. The Results: 63.3% of nurse mentors had unsatisfactory knowledge, 37.3% of them had satisfactory knowledge with mean ±SD= 25.0±6.2. Also, 63.3% of them had low mentorship competencies, 23.3% had moderate competencies, 13.3% of them had high competencies with mean ±SD= 37.1 ±4.1. 70% of them had unsatisfactory performance, 30% of them had with mean ±SD= 49.7±6.9. Conclusion: The most of the studied nurse mentors had low mentorship competencies. Recommendations: conduct an educational program about nursing mentorship competencies to the different stages of nursing education to foster the continued growth and development of nurse mentors and nurse students. Also, it is recommended to increase the number of nurse mentors in clinical training settings.