Diving Irrsee
Site Overview
Irrsee is a alpine lake dive site in Upper Austria – Salzkammergut, Austria, set among the country’s varied freshwater landscapes. Irrsee is a shallow, warm alpine lake near the Attergau, a relaxed and very accessible diving and bathing lake. Rich aquatic vegetation and weed beds make it good for training and for macro and fish-watching close to the shore. It warms more than the deep Salzkammergut lakes, so summer dives are comfortable in a wetsuit. Night dives are popular here, with the calm water and easy access making after-dark diving relaxing. Pike, perch and tench use the plants, and the clear shallows suit beginner photography. It is the gentle, friendly face of the lake district, ideal for courses and easy fun. Conditions are typical of Austrian inland water: visibility generally runs from 6 to 16 metres, the current is low and the water temperature ranges between 5 and 22 degrees Celsius depending on season and depth. The marine life is freshwater and centred on northern pike, european perch, tench, with the full community described below for those planning a dive. Because of its beginner rating and the need for Open Water certification, Irrsee is best approached with the right thermal protection and, where relevant, altitude or overhead training. It is a representative example of why Austrian lake diving, with its cold clarity, submerged forests and wrecks, attracts divers who want something different from tropical reefs.
Dive Briefing
"Entry is made from the shore near Straß im Attergau, and divers should check in with a local centre before entering the water. Irrsee is a shallow, warm alpine lake near the Attergau, a relaxed and very accessible diving and bathing lake. Rich aquatic vegetation and weed beds make it good for training and for macro and fish-watching close to the shore. It warms more than the deep Salzkammergut lakes, so summer dives are comfortable in a wetsuit. Night dives are popular here, with the calm water and easy access making after-dark diving relaxing. Plan your profile around a maximum depth of 32 m and an average of 14 m, keeping a close eye on gas and, in deeper sections, on the cold thermocline. Buoyancy control matters: silty or vegetated bottoms and submerged structures are easily disturbed, and shallow depth limits skills to shallow profiles is a real consideration here. A safe ascent with a surface marker buoy and a clear exit plan completes the dive, with emergency cover routed through Salzkammergut Clinic, Vöcklabruck."
Signature Marine Life
Northern Pike
Esox lucius
Best: May, June, July
European Perch
Perca fluviatilis
Best: May, June, July
Tench
Tinca tinca
Best: July, August
Roach
Rutilus rutilus
Best: May, June, July
Rudd
Scardinius erythrophthalmus
Best: May, June, September
Noble Crayfish
Astacus astacus
Best: May, June, July
Safety & Hazards
- Shallow depth limits skills to shallow profiles
- Algae blooms reducing visibility
- Swimmer and bather traffic in summer
- Required Arge Tauchen permit
- Silt in the weeds
- Cold early and late season
Traveler Notes
Who is this for?
Irrsee suits beginner divers holding at least an Open Water certification, and it is a strong choice for those who enjoy cold-water, freshwater environments. Photographers, training groups and divers chasing wrecks, walls or macro life will all find something here, provided they respect the temperature and the limits of an inland lake. It is less suitable for absolute novices unless booked through a centre running a supervised course, and overhead or very deep sections should only be attempted with the correct specialist training.
For Non-Divers
Irrsee lido and beach; Attergau countryside walks; The Attersee crossing road; Local inns and cider
Quick Stats
Dive Logistics
- Tauchterminal Weyregg
- Attersee Diving
- Traunsee Divers Gmunden
Photography Info
Best for: macro, wide_angle
Nearby Stay
Landhotel Tauchterminal Weyregg
Weyregg am Attersee • 20km away
Seehotel Das Traunsee
Gmunden • 20km away