Onyx Gymnastics

Last updated February 2026

Onyx Gymnastics is a dedicated gymnastics facility located in Mosman, Sydney, offering a range of programs for young athletes. Situated at George's Heights, Building 15, Best Ave, this venue provides specialised training in a supportive environment. The facility is designed to foster strength, coordination, and confidence in children through structured gymnastics classes. Onyx Gymnastics caters to various skill levels, from introductory classes for beginners to more advanced training for experienced gymnasts. Its location in Mosman makes it an accessible option for families in Sydney's lower north shore seeking extracurricular activities. **What to Bring** Comfortable athletic clothing. Water bottle. Non-slip socks or bare feet. **Best Age Range** Ideal for children aged 3 to 12 years, with programs tailored to different developmental stages. Younger children benefit from foundational movement skills and coordination development, while older children can engage in more complex routines and skill progression. **Good to Know** Casual visit options are available, but pre-booking is recommended, especially during school terms. Parking is available on-site. Classes run on weekdays and Saturdays, with sessions often filling up quickly. **Nearby** Balmoral Beach offers a family-friendly foreshore for picnics and swimming. The Mosman Rowers Club provides casual dining options with harbour views.