The largest lake entirely within Trentino and one of the warmest swimmable lakes in the Alps, reaching 22–24°C in summer. Ringed by lidos and Blue Flag beaches at Calceranica, Caldonazzo and San Cristoforo, it is the region's premier swimming and watersports lake.
Lago di Caldonazzo, in the Valsugana valley east of Trento in Trentino, is the largest lake lying wholly within the region and one of the warmest lakes in the entire Alps, with summer surface temperatures commonly reaching 22 to 24 degrees. That warmth, together with a relatively shallow basin around 16 metres at its deepest, makes it the leading swimming lake of Trentino and a magnet for families and watersports enthusiasts from late spring to early autumn. The lake is ringed by the villages of Caldonazzo, Calceranica al Lago, San Cristoforo and Tenna, each with grassy lidos that shelve gently into the water through sandy and pebbly entries; several of these beaches have repeatedly earned Blue Flags for their clean water and good facilities. Bathing is possible from roughly May to the end of September. Beyond swimming, the lake is a genuine watersports hub: sailing, windsurfing, rowing, kayaking and stand-up paddleboarding are all popular, with schools and rental points around the shore, and a lakeside cycle and walking path circles much of the water. The lidos provide lawns for sunbathing, pedalo and board hire, bars and restaurants, and lifeguards in the high season, while the surrounding Valsugana offers campsites, family hotels and the nearby spa town of Levico. Framed by wooded hills rather than high peaks, Caldonazzo has a softer, more Mediterranean feel than the high Dolomite lakes, and its warmth makes it especially well suited to young children. In July and August the popular lidos fill on hot weekends, so an earlier arrival secures the best lawn space and parking. For warm, safe, sociable lake bathing close to Trento, Caldonazzo is the standout choice in the region.
Good to know
- Best for
- families, swimmers, windsurfers, sailors, kayakers
- Facilities
- Lidos with lawns and swimming zones, Pedalo, SUP and sailing hire, Bars and restaurants, Lifeguards in season
Location
46.0094, 11.2358 View on map
Highlights
- Largest lake in Trentino and one of the warmest in the Alps at 22–24°C
- Blue Flag lidos at Calceranica, Caldonazzo, San Cristoforo and Tenna
- Major hub for sailing, windsurfing, kayaking and SUP
- Gentle, warm, shallow entries ideal for families with children
Tips for visiting
- The water warms early, so swimming is comfortable from late May
- Calceranica and Caldonazzo lidos have the best family facilities
When to visit
June to September brings the warmest water; the lake warms early so late May can already be pleasant, and in July and August arriving earlier secures lawn space and parking at the busy lidos.
Accessibility
The main lidos at Calceranica and Caldonazzo have car parks close by, level grassy lawns and gentle entries to the water, making them among the more accessible bathing spots in the region, though dedicated beach wheelchairs are not guaranteed and visitors with mobility needs should check provision locally.
Frequently asked questions
How warm is Lake Caldonazzo for swimming?
It is one of the warmest lakes in the Alps, with summer surface temperatures commonly reaching 22 to 24 degrees, and bathing is possible from roughly May to the end of September — making it comfortable for families and young children.
Where are the best beaches and lidos?
The lidos at Calceranica al Lago and Caldonazzo have the fullest family facilities, while the beaches at the Lido, Tenna, San Cristoforo and Calceranica have repeatedly earned Blue Flags for clean water.
What watersports are available?
The lake is a watersports paradise, with sailing, windsurfing, rowing, kayaking and stand-up paddleboarding all popular and supported by schools and rental points around the shore.