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) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10-04-2026 08:00 | - | - | 0.07 | 0.14 | 14.2 | 2.3 | - | - | - | - | - |
| Dyddiad | Hs uchaf 2026 | Storm Alert Threshold (0.25 yr Return Period Hs) |
|---|---|---|
| 04-04 | 1.3m | 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10-04-2026 08:00 | - | - | 0.07 | 0.14 | 14.2 | 2.3 | - | - | - | - | - |
| 10-04-2026 07:30 | - | - | 0.07 | 0.1 | 14.2 | 2.3 | - | - | - | - | - |
| 10-04-2026 07:00 | - | - | 0.07 | 0.11 | 14.2 | 2.4 | - | - | - | - | - |
| 10-04-2026 06:30 | - | - | 0.07 | 0.11 | 14.2 | 2.4 | - | - | - | - | - |
| 10-04-2026 06:00 | - | - | 0.06 | 0.13 | 14.2 | 3.3 | - | - | - | - | - |
| 10-04-2026 05:30 | - | - | 0.05 | 0.09 | 14.2 | 4.7 | - | - | - | - | - |
| 10-04-2026 05:00 | - | - | 0.05 | 0.08 | 14.2 | 4.9 | - | - | - | - | - |
| 10-04-2026 04:30 | - | - | 0.06 | 0.12 | 14.2 | 2.5 | - | - | - | - | - |
| 10-04-2026 04:00 | - | - | 0.05 | 0.09 | 14.2 | 2.8 | - | - | - | - | - |
| 10-04-2026 03:30 | - | - | 0.05 | 0.09 | 5.1 | 3 | - | - | - | - | - |
| 10-04-2026 03:00 | - | - | 0.05 | 0.11 | 4.6 | 2.5 | - | - | - | - | - |
| 10-04-2026 02:30 | - | - | 0.07 | 0.15 | 4.3 | 2.1 | - | - | - | - | - |
| 10-04-2026 02:00 | - | - | 0.1 | 0.18 | 4.1 | 2 | - | - | - | - | - |
| 10-04-2026 01:30 | - | - | 0.12 | 0.23 | 3.8 | 1.8 | - | - | - | - | - |
| 10-04-2026 01:00 | - | - | 0.16 | 0.3 | 3.6 | 1.7 | - | - | - | - | - |
| 10-04-2026 00:30 | - | - | 0.2 | 0.34 | 3.1 | 1.9 | - | - | - | - | - |
| 10-04-2026 00:00 | - | - | 0.19 | 0.35 | 3.2 | 2 | - | - | - | - | - |
| 09-04-2026 23:30 | - | - | 0.18 | 0.33 | 3.3 | 2 | - | - | - | - | - |
| 09-04-2026 23:00 | - | - | 0.2 | 0.35 | 2.8 | 1.9 | - | - | - | - | - |
| 09-04-2026 22:30 | - | - | 0.19 | 0.31 | 2.6 | 1.8 | - | - | - | - | - |
| 09-04-2026 22:00 | - | - | 0.17 | 0.28 | 3.9 | 1.8 | - | - | - | - | - |
| 09-04-2026 21:30 | - | - | 0.13 | 0.2 | 2.6 | 1.8 | - | - | - | - | - |
| 09-04-2026 21:00 | - | - | 0.12 | 0.2 | 2.9 | 1.8 | - | - | - | - | - |
| 09-04-2026 20:30 | - | - | 0.11 | 0.21 | 2.8 | 1.8 | - | - | - | - | - |
| 09-04-2026 20:00 | - | - | 0.14 | 0.22 | 4.1 | 1.7 | - | - | - | - | - |
| 09-04-2026 19:30 | - | - | 0.14 | 0.24 | 3.5 | 1.7 | - | - | - | - | - |
| 09-04-2026 19:00 | - | - | 0.15 | 0.27 | 3 | 1.7 | - | - | - | - | - |
| 09-04-2026 18:30 | - | - | 0.17 | 0.33 | 3.2 | 1.9 | - | - | - | - | - |
| 09-04-2026 18:00 | - | - | 0.15 | 0.26 | 3.9 | 1.9 | - | - | - | - | - |
| 09-04-2026 17:30 | - | - | 0.16 | 0.31 | 3.7 | 1.9 | - | - | - | - | - |
| 09-04-2026 17:00 | - | - | 0.3 | 0.58 | 4.6 | 3 | - | - | - | - | - |
| 09-04-2026 16:30 | - | - | 0.32 | 0.53 | 5.6 | 3.2 | - | - | - | - | - |
| 09-04-2026 16:00 | - | - | 0.26 | 0.47 | 5.8 | 2.6 | - | - | - | - | - |
| 09-04-2026 15:30 | - | - | 0.28 | 0.52 | 6.1 | 2.4 | - | - | - | - | - |
| 09-04-2026 15:00 | - | - | 0.41 | 0.84 | 5.3 | 2.9 | - | - | - | - | - |
| 09-04-2026 14:30 | - | - | 0.46 | 0.83 | 5.1 | 3 | - | - | - | - | - |
| 09-04-2026 14:00 | - | - | 0.32 | 0.63 | 4.7 | 2.6 | - | - | - | - | - |
| 09-04-2026 13:30 | - | - | 0.3 | 0.59 | 4.4 | 2.4 | - | - | - | - | - |
| 09-04-2026 13:00 | - | - | 0.24 | 0.43 | 4.4 | 2 | - | - | - | - | - |
| 09-04-2026 12:30 | - | - | 0.27 | 0.5 | 3.9 | 2.1 | - | - | - | - | - |
| 09-04-2026 12:00 | - | - | 0.3 | 0.57 | 3.7 | 2.3 | - | - | - | - | - |
| 09-04-2026 11:30 | - | - | 0.36 | 0.68 | 3.4 | 2.4 | - | - | - | - | - |
| 09-04-2026 11:00 | - | - | 0.31 | 0.55 | 3 | 2.3 | - | - | - | - | - |
| 09-04-2026 10:30 | - | - | 0.29 | 0.54 | 2.7 | 2.1 | - | - | - | - | - |
| 09-04-2026 10:00 | - | - | 0.29 | 0.53 | 2.5 | 2 | - | - | - | - | - |
| 09-04-2026 09:30 | - | - | 0.18 | 0.32 | 2.5 | 1.9 | - | - | - | - | - |
| 09-04-2026 09:00 | - | - | 0.17 | 0.33 | 7.5 | 1.8 | - | - | - | - | - |
| 09-04-2026 08:30 | - | - | 0.18 | 0.31 | 10.7 | 1.8 | - | - | - | - | - |
| 09-04-2026 08:00 | - | - | 0.18 | 0.32 | 10.7 | 1.8 | - | - | - | - | - |
