

Best for intermediate divers, 20-40m, shore entry, mild current.
Ober Nas is a freshwater wall and reef site located in Weggis-Vitznau. The topography drops from 20 to 40 metres, requiring solid buoyancy control for divers exploring the deeper sections. Conditions feature mild currents and visibility ranging from 5 to 10 metres. A thermocline is typically present, with temperatures at 20 metres and deeper remaining constant at 5-6°C, while surface temperatures can reach 20°C in summer. Access is via a shore entry with parking available on site. Due to heavy boat traffic, the use of a surface marker buoy is essential for safety. Divers should also remain vigilant for entanglement risks such as fishing lines along the wall.
46.99548, 8.47367
The site is private military land, so it is recommended to dive from a boat rather than entering from the shore.
A small parking area along the Gersau-Vitznau road offers space for approximately two cars, but there is a parking ban on the paved area.
Expected in this region. No sightings logged here yet.
Depth
20-40m
Visibility
5-10m
Skill Level
Intermediate
Entry
Shore
Current
Mild
Typical Dive
40 min
No, this site is rated for intermediate divers due to the depth of 20 to 40 metres and the requirement for precise buoyancy control.
The site features a wall and reef structure that extends from 20 to 40 metres in depth.
Ober Nas is a shore entry dive site with parking available nearby.
The main hazards include heavy boat traffic, deep water, potential entanglement with fishing lines, and variable visibility.
Diving at Ober Nas in Gersau requires the following certifications: Open Water. Always dive within your training limits.
Ober Nas in Gersau typically has mild currents that most divers can handle comfortably.
Visibility at Ober Nas in Gersau typically ranges from 5 metres to 10 metres. Conditions vary with weather, tides, and seasons.