Welcome to Karleyth Diving

About Us

Based in the heart of the Roseland Peninsula, our SSI Dive Centre is located at Chenoweths Business Park in Ruan High Lanes, near Truro, Cornwall. Surrounded by some of the UK’s most beautiful and biodiverse coastline, we’re perfectly placed to help you discover the incredible underwater world that Cornwall has to offer.

Karleyth is the Cornish word for ray, as in the graceful stingray that glides effortlessly through the ocean. The name reflects our deep connection to the sea—symbolising freedom, movement, and life beneath the surface.

Dive Training for Every Level

We provide high-quality SSI scuba diving training for complete beginners taking their first breath underwater, right through to advanced, technical, and professional-level divers working towards instructor certification. Whether you’re just starting out or looking to progress your diving career, our experienced team is here to guide you every step of the way.

Equipment, Servicing & Gas Fills

Alongside our training, we offer a full range of diving equipment sales and professional servicing to keep you diving safely and confidently. We also provide reliable air and nitrox fills, ensuring you have everything you need for your next dive adventure.

A Passion-Driven Community

At the core of our dive centre is a strong, welcoming community. We pride ourselves on creating a friendly, inclusive environment where everyone feels at home—from first-time divers to seasoned professionals.

Our team isn’t just made up of instructors—we’re passionate divers, marine biologists, and underwater photographers who truly live and breathe the ocean. Diving isn’t just our business; it’s our lifestyle. That passion drives everything we do, from the way we teach to the experiences we create.

More Than Just Diving

We are deeply committed to marine conservation and protecting the incredible ecosystems we explore. Every dive is an opportunity to connect with the ocean, learn about marine life, and inspire others to help protect it.

Above all, we’re here to create unforgettable experiences. Whether it’s your first dive or your hundredth, our goal is simple: to help you feel confident, have fun, and make incredible memories both above and below the surface.