Overlay selected years on a Jan–Dec axis to spot seasonal patterns
Drag to select a date range — updates the year checkboxes above.
Daily mean water temperature on Oct 22 each year and the average over the 30 days up to it.
| Year | Oct 22 | 30-day average |
|---|---|---|
| 2026 | 16.9°C | 18.7°C |
| 2025 | 15.2°C | 18.0°C |
| 2024 | 18.3°C | 20.6°C |
| 2023 | 17.4°C | 20.3°C |