Pendinas & Llyn Cyfynwy
Hafren Dyfrdwy · 👁 24 views
46.0%
full
Where it is
A reliable location is not available for this record, so no map marker is shown. Its reported level history is kept below.
Level history
This time of year, in past years
| Year | % full (nearest reading) |
|---|---|
| 2026 | 46.0% |
| 2025 | 60.3% |
| 2024 | 81.1% |
| 2023 | 62.4% |
Nearest reading within 10 days either side of today's date, for each year on record.
El Niño 2026–27The tropical Pacific is running 3.3 °C above normal (week of 4–10 October 2026).What past El Niño winters brought Britain →
Where this comes from. Reservoir data © the UK water companies, from their published reservoir-level reports and the Stream water-industry open data portal (CC BY 4.0). Thames Water London history via the London Datastore (Open Government Licence v2). Figures are exactly as published by Hafren Dyfrdwy — reporting day and
rounding vary. Levels older than 21 days are marked "last reported" rather than treated as current.