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Carsten Steger CC BY-SA 4.0 Wikimedia Commons

Irrsee

Lake

In Upper Austria, the Irrsee (lake) offers swimming, boating and lakeside walking trails amid the low hills of the Salzkammergut region.

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In this guide

Irrsee essentials

Address: Irrsee (Lake Irr), Upper Austria

About Irrsee

Irrsee is a lake in Upper Austria within the Salzkammergut region, sometimes also referred to locally by the name Zellersee. The lake is comparatively small and is used for swimming, sailing and other low-impact recreational activities by nearby communities.

The shoreline is dotted with small settlements and lakeside facilities serving seasonal visitors rather than large-scale tourism. The lake sits amid the rolling, lake-dotted landscape typical of the Salzkammergut and is accessible by regional roads from neighbouring towns and villages.

Historically the lake has been part of local fishing and rural economies and today functions primarily as a local recreational resource.

  • Recreation: A freshwater lake in Upper Austria’s Salzkammergut region that is used locally for bathing, boating and shoreline recreation during warmer months.
Things to Do
When to Go

Best Time to Visit Irrsee

Summer is best for swimming and boating; autumn provides clearer skies and quieter shores for walking.

Summer
June-August · 18-28°C
Warm water for swimming and full-service lakeside amenities open.
Autumn
September-October · 8-18°C
Cooler weather with clear skies and fewer tourists, good for hiking and photography.

Weather & Climate near Irrsee

Climate

Irrsee's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -4°C to 22°C. Abundant rainfall (1271 mm/year), wettest in July.

Air Quality: AQI 35 Good
Best Time to Visit
JulyAugustSeptember
Temperature & Rainfall
Temperature Range
35°
Warmest Month
-21°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Poor -5° - 2° -4° 77 mm overcast 90% 2.0 m/s 0.1 low 8.8h
February Poor -4° - 4° -3° 70 mm overcast 88% 2.1 m/s 0.3 low 10.1h
March Poor -1° - 8° 2° 89 mm overcast 83% 2.2 m/s 0.6 moderate 11.8h
April Acceptable 3° - 12° 6° 90 mm overcast 78% 2.3 m/s 0.9 moderate 13.5h
May Acceptable 7° - 18° 13° 111 mm overcast 79% 2.1 m/s 1.2 high 14.9h
June Acceptable 10° - 20° 15° 152 mm overcast 77% 1.9 m/s 1.5 very high 15.7h
July Good 12° - 22° 17° 166 mm partly cloudy 77% 2.0 m/s 1.6 very high 15.3h
August Good 12° - 22° 17° 150 mm partly cloudy 78% 1.8 m/s 1.3 high 14.1h
September Good 9° - 18° 13° 104 mm partly cloudy 81% 1.9 m/s 0.8 moderate 12.4h
October Acceptable 4° - 13° 8° 80 mm partly cloudy 85% 1.9 m/s 0.5 low 10.7h
November Poor 0° - 6° 1° 92 mm overcast 90% 2.1 m/s 0.2 low 9.2h
December Poor -3° - 3° -3° 90 mm overcast 90% 2.0 m/s 0.1 low 8.3h
Getting There & Around

How to Get to Irrsee

Irrsee is accessible by car from Salzburg or the Salzkammergut region via local roads (B158 and regional connectors). Public buses serve nearby towns; the lake is a short walk from the closest village.

Tips for Visiting Irrsee

  • Arrive early on weekdays to enjoy peaceful lakeside walking paths and to see the water mirror the mountains.
  • Rent a small rowboat from the lakeside club to get a different perspective and to reach quieter coves.
  • If visiting in summer, combine a swim with a lakeside café visit - local trout dishes are notable.