National Network of Regional Coastal Monitoring Programmes
« Dychwelid at fap am donau, llanw a gorsafoedd tywydd eraill.
Mae'r data yma yn amser real ac mae'r safon heb wireddu.
Second Severn Crossing
Tide Levels and HarmonicsData Tonnau Diweddaraf
| Amser (ASG) | Lledred | Hydred | Uchder ton (m) | Uchder uchaf ton (m) | Tbrig (s) | Tz (s) | Cyfeiriad mwyaf cyffredin (gradd) | Ymlediad (gradd) | Tymheredd y môr (°C) | Energy Period (s) | Wave Power (kW/m) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 16-11-2025 12:00 | - | - | 0.11 | 0.19 | 14.2 | 1.8 | - | - | - | - | - |
| Dyddiad | Hs uchaf 2025 | Storm Alert Threshold (0.25 yr Return Period Hs) |
|---|---|---|
| 15-09 | 1.2m | 0.74m |
| Amser (ASG) | Lledred | Hydred | Uchder ton (m) | Uchder uchaf ton (m) | Tbrig (s) | Tz (s) | Cyfeiriad mwyaf cyffredin (gradd) | Ymlediad (gradd) | Tymheredd y môr (°C) | Energy Period (s) | Wave Power (kW/m) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 16-11-2025 12:00 | - | - | 0.11 | 0.19 | 14.2 | 1.8 | - | - | - | - | - |
| 16-11-2025 11:30 | - | - | 0.1 | 0.17 | 9.1 | 1.8 | - | - | - | - | - |
| 16-11-2025 11:00 | - | - | 0.09 | 0.15 | 14.2 | 1.8 | - | - | - | - | - |
| 16-11-2025 10:30 | - | - | 0.1 | 0.17 | 8.5 | 1.7 | - | - | - | - | - |
| 16-11-2025 10:00 | - | - | 0.12 | 0.22 | 10.7 | 1.7 | - | - | - | - | - |
| 16-11-2025 09:30 | - | - | 0.12 | 0.23 | 12.8 | 1.7 | - | - | - | - | - |
| 16-11-2025 09:00 | - | - | 0.15 | 0.24 | 10.7 | 1.6 | - | - | - | - | - |
| 16-11-2025 08:30 | - | - | 0.16 | 0.27 | 14.2 | 1.7 | - | - | - | - | - |
| 16-11-2025 08:00 | - | - | 0.14 | 0.24 | 14.2 | 1.7 | - | - | - | - | - |
| 16-11-2025 07:30 | - | - | 0.13 | 0.2 | 11.6 | 1.7 | - | - | - | - | - |
| 16-11-2025 07:00 | - | - | 0.17 | 0.29 | 9.1 | 1.7 | - | - | - | - | - |
| 16-11-2025 06:30 | - | - | 0.17 | 0.29 | 5.3 | 1.7 | - | - | - | - | - |
| 16-11-2025 06:00 | - | - | 0.2 | 0.35 | 3.9 | 1.6 | - | - | - | - | - |
| 16-11-2025 05:30 | - | - | 0.23 | 0.42 | 2.3 | 1.7 | - | - | - | - | - |
| 16-11-2025 05:00 | - | - | 0.2 | 0.34 | 14.2 | 1.7 | - | - | - | - | - |
| 16-11-2025 04:30 | - | - | 0.27 | 0.53 | 2.7 | 2 | - | - | - | - | - |
| 16-11-2025 04:00 | - | - | 0.25 | 0.49 | 3.3 | 2.1 | - | - | - | - | - |
| 16-11-2025 03:30 | - | - | 0.16 | 0.27 | 3.1 | 1.9 | - | - | - | - | - |
| 16-11-2025 03:00 | - | - | 0.11 | 0.19 | 3.7 | 1.8 | - | - | - | - | - |
| 16-11-2025 02:30 | - | - | 0.11 | 0.2 | 4 | 1.8 | - | - | - | - | - |
| 16-11-2025 02:00 | - | - | 0.12 | 0.21 | 4.9 | 1.8 | - | - | - | - | - |
| 16-11-2025 01:30 | - | - | 0.12 | 0.23 | 5.8 | 1.8 | - | - | - | - | - |
| 16-11-2025 01:00 | - | - | 0.13 | 0.21 | 4.9 | 1.7 | - | - | - | - | - |
| 16-11-2025 00:30 | - | - | 0.12 | 0.2 | 4.4 | 1.7 | - | - | - | - | - |
| 16-11-2025 00:00 | - | - | 0.11 | 0.17 | 4.4 | 1.7 | - | - | - | - | - |
| 15-11-2025 23:30 | - | - | 0.09 | 0.16 | 10.7 | 1.8 | - | - | - | - | - |
| 15-11-2025 23:00 | - | - | 0.09 | 0.18 | 9.1 | 1.7 | - | - | - | - | - |
| 15-11-2025 22:30 | - | - | 0.09 | 0.19 | 8.5 | 1.7 | - | - | - | - | - |
| 15-11-2025 22:00 | - | - | 0.1 | 0.16 | 14.2 | 1.7 | - | - | - | - | - |
| 15-11-2025 21:30 | - | - | 0.1 | 0.18 | 12.8 | 1.7 | - | - | - | - | - |
| 15-11-2025 21:00 | - | - | 0.13 | 0.24 | 11.6 | 1.7 | - | - | - | - | - |
| 15-11-2025 20:30 | - | - | 0.14 | 0.24 | 10.7 | 1.6 | - | - | - | - | - |
| 15-11-2025 20:00 | - | - | 0.12 | 0.21 | 14.2 | 1.7 | - | - | - | - | - |
| 15-11-2025 19:30 | - | - | 0.1 | 0.17 | 9.1 | 1.8 | - | - | - | - | - |
| 15-11-2025 19:00 | - | - | 0.12 | 0.2 | 14.2 | 1.8 | - | - | - | - | - |
| 15-11-2025 18:30 | - | - | 0.13 | 0.23 | 5.1 | 1.7 | - | - | - | - | - |
| 15-11-2025 18:00 | - | - | 0.14 | 0.26 | 14.2 | 1.6 | - | - | - | - | - |
| 15-11-2025 17:30 | - | - | 0.17 | 0.27 | 12.8 | 1.6 | - | - | - | - | - |
| 15-11-2025 17:00 | - | - | 0.17 | 0.31 | 6.4 | 1.6 | - | - | - | - | - |
| 15-11-2025 16:30 | - | - | 0.16 | 0.26 | 7.1 | 1.6 | - | - | - | - | - |
| 15-11-2025 16:00 | - | - | 0.2 | 0.6 | 32 | 3.3 | - | - | - | - | - |
| 15-11-2025 15:30 | - | - | 0.19 | 0.35 | 2.7 | 1.9 | - | - | - | - | - |
| 15-11-2025 15:00 | - | - | 0.12 | 0.23 | 2.7 | 1.7 | - | - | - | - | - |
| 15-11-2025 14:30 | - | - | 0.1 | 0.17 | 14.2 | 1.8 | - | - | - | - | - |
| 15-11-2025 14:00 | - | - | 0.09 | 0.15 | 14.2 | 1.8 | - | - | - | - | - |
| 15-11-2025 13:30 | - | - | 0.09 | 0.15 | 4.1 | 1.8 | - | - | - | - | - |
| 15-11-2025 13:00 | - | - | 0.1 | 0.18 | 4.9 | 1.8 | - | - | - | - | - |
| 15-11-2025 12:30 | - | - | 0.12 | 0.2 | 14.2 | 1.7 | - | - | - | - | - |
| 15-11-2025 12:00 | - | - | 0.11 | 0.18 | 10.7 | 1.7 | - | - | - | - | - |
