

Grottoni is a freshwater wall and reef site located in Weggis-Vitznau, Switzerland. The site features a wall structure descending from 5 metres to a maximum depth of 40 metres, with an average depth of 25 metres. Divers can expect mild currents and visibility ranging between 10 and 20 metres. Entry is via the shore. Due to cold water temperatures, particularly at depth, proper thermal protection such as a dry suit is recommended. Divers should remain mindful of potential entanglement hazards near the reef structures. Facilities at the site include parking and a cafe, allowing for convenient preparation and post-dive recovery.
46.95121, 8.58742
Parking and a cafe are available at the site, so arriving early gives you time to kit up without rushing and warm up properly after your dive. Cold water is a real factor here year-round, so check your thermal protection is adequate before you enter.
Most dive spots are reached from the northern shores, but several are better reached by boat. A charter boat is available one Sunday each month.
Recorded at this site
Depth
5-40m
Visibility
10-20m
Entry
Shore
Current
Mild
Typical Dive
45 min
Best Time
Jun, Jul, Aug, Sep
The site ranges from 5 metres to 40 metres, with an average depth of 25 metres.
The site is suitable for open water certified divers, with the shallow sections allowing for gradual progression to deeper areas.
Grottoni is a shore-entry dive site.
The main hazards are cold water temperatures and potential entanglement risks near the reef structures.
Yes, parking and a cafe are available at the site.
Diving at Grottoni in Lucerne requires the following certifications: Open Water. Always dive within your training limits.
The best months to visit Grottoni in Lucerne are June, July, August, and September. Conditions outside these months can still be good but are less predictable.
Grottoni in Lucerne typically has mild currents that most divers can handle comfortably.
Visibility at Grottoni in Lucerne typically ranges from 10 metres to 20 metres. Conditions vary with weather, tides, and seasons.