In August 2026, Basel’s outdoor pools averaged 24.3 °C, ranging from 18 °C to 34 °C, with 27 warm days and no cool days. The overall average water temperature was about 1.9 °C higher than in August 2025, though some 2025 maximum values are unreliable.
Across Basel’s outdoor pools in August 2026, water temperatures ranged from 18 °C to 34 °C, with an overall average of 24.3 °C. The warmest reading was 34 °C at Bachgraben Familienbad; the lowest was 18 °C at Eglisee Familienbad and Hallenbad Eglisee. There were 27 warm days (overall daily maximum above 25 °C) and no cool days (below 18 °C). Outdoor air temperatures averaged 23.7 °C, with a maximum of 38.1 °C; 18 days exceeded 30 °C, and only 3 days stayed between 20 and 25 °C. Compared with August 2025, the overall average water temperature rose by about 1.9 °C, though some 2025 maximum values appear erroneous and are not comparable.
🤖 This text was generated with the assistance of AI. All quantitative statements are derived directly from the dataset listed under Data Source.