We track 28 dive operators in Greifensee & Pfäffikersee. 7 teach certification courses (6 PADI, 5 SSI). 2 run snorkelling trips. The biggest cluster is around Steckborn, with 3. Listings are ordered by Fin Rank: a published score for how complete and verified each listing is.
The 8 highest-ranked of 28. How Fin Rank works
| Rank | Operator | TripAdvisor | Try dive | Agencies | Website | |
|---|---|---|---|---|---|---|
| 1 | Divecorner | 5.0(3) | none | $106 | SSI · PADI | Visit |
Which centres run each site, named on their own websites or confirmed by the owner.
Fin lists 28 dive operators in Greifensee & Pfäffikersee, with the biggest cluster around Steckborn. 7 of them run certification courses.
PADI is the most common agency (6 centres), followed by SSI (5). SDI/TDI also appear.
2 of the 28 operators we track run snorkelling tours.
Operators are sorted by Fin Rank, a 100-point profile strength score: contact details, what they offer, the dive sites they run, their Google reputation, whether the owner has claimed the listing, and whether their own website links to Fin. 0 listings here are owner-verified. The formula is published in full on the Fin Rank page.
Divecorner is a dive center based in Winterthur that offers various diving courses ranging from beginner to technical levels. They provide equipment rental, organize group dives, and conduct training in local waters and swimming pools.

dive.steha.ch - Dive Center is the dive center associated with the dive school of the same name in Romanshorn, Switzerland. It serves as a hub for diving activities, offering equipment sales, rentals, and servicing. The center is situated by Lake Constance, facilitating various water-based activities.
Sidemount-Kurse.com is a specialized training provider for sidemount diving courses, located in Weinfelden, Switzerland. They offer in-depth training for divers looking to gain certification and experience in sidemount configurations. The website focuses exclusively on sidemount diving education.
dive.steha.ch - Die Tauchschule am Bodensee is a dive school located in Romanshorn, Switzerland, on the shores of Lake Constance. They offer a variety of diving courses, equipment sales, and guided dives, with a focus on training and exploration in the lake. The school also provides air fills and equipment rental.
TC-Rheindive.ch is a diving club based in Eschenz that organizes diving activities in the Rhine, Untersee, and Bodensee regions. The club offers various training courses for beginners and advanced divers, as well as equipment rental and air fills.

freedive-thurgau.ch is a center focused on freediving education and training in Felben-Wellhausen, Switzerland. They offer freediving courses and workshops, emphasizing safety and proper techniques. The center aims to promote freediving as a sport and recreational activity.
Technical Underwater Support is a company based in Kesswil, Switzerland, that provides technical diving services and training. They focus on advanced diving techniques, equipment, and support for complex underwater operations. The company offers specialized courses and equipment solutions for technical divers.
Pro marine is a dive school and shop located in Gottmadingen near Lake Constance. They offer a range of PADI courses from beginner to professional levels, as well as guided dives and equipment maintenance services.
Dugong Dive Center is a sporting goods store in Schaffhausen, Switzerland, that also functions as a dive center. It has a 4.8-star rating from 32 reviews and offers wheelchair-accessible parking and entrance. They are open on Thursdays, Fridays, and Saturdays.
Dugong Dive Center is a dive school based in Schaffhausen that offers training from beginner to professional levels. They provide courses in sport and technical diving, as well as river diving in Switzerland.
| 2 | 4.8(15) | none | none | PADI · SSI | Visit |
| 3 | Sidemount-Kurse.com | 5.0(50) | none | none | SDI/TDI | Visit |
| 4 | dive.steha.ch - Die Tauchschule am Bodensee. | 4.8(15) | none | none | PADI · SSI | Visit |
| 5 | TC-Rheindive.ch | 4.8(8) | none | none | none | Visit |
| 6 | 5.0(21) | none | none | none | Visit |
| 7 | Technical Underwater Support | 5.0(9) | none | none | SDI/TDI | Visit |
| 8 | Pro Marine GmbH | none | none | none | PADI | Visit |
