

Best for intermediate divers, 20-40m, shore entry, mild current.
Tunnel 1 2 is a shore-accessible freshwater dive site located in Brunnen-Flüelen, Lake Lucerne. The site features an overhead environment with swim-throughs and reaches depths between 20 and 40 metres, with an average depth of 35 metres. Divers should expect mild currents and visibility ranging from 5 to 10 metres. Due to the depth and overhead nature of the site, careful gas management and monitoring for nitrogen narcosis are essential. Surface boat traffic requires vigilance during entry and ascent. Facilities at the site include parking and toilets, making it convenient for surface intervals. This site is suited for intermediate divers experienced in deep and overhead environments.
47.13778, 9.13175
The passage to Betlis is only possible every half hour.
Leave the A3 and drive to the centre of Weesen. Follow the main road towards Amden through the village and turn towards Betlis. Park at the beach bath (Strandbad). Do not park between the tunnels; only stop briefly to unload equipment.
Recorded at this site
Depth
20-40m
Visibility
5-10m
Skill Level
Intermediate
Entry
Shore
Current
Mild
Typical Dive
40 min
No, this site is intended for intermediate divers due to the deep profile, overhead environment, and potential for nitrogen narcosis.
The site ranges from 20 to 40 metres, with an average depth of 35 metres.
Tunnel 1 2 is a shore-accessible dive site.
Hazards include boat traffic, deep water, variable visibility, nitrogen narcosis, and the overhead environment.
Yes, parking and toilets are available on site.
Diving at Tunnel 1 2 in Weesen requires the following certifications: Open Water. Always dive within your training limits.
Tunnel 1 2 in Weesen typically has mild currents that most divers can handle comfortably.
Visibility at Tunnel 1 2 in Weesen typically ranges from 5 metres to 10 metres. Conditions vary with weather, tides, and seasons.