National Network of Regional Coastal Monitoring Programmes
« Dychwelid at fap am donau, llanw a gorsafoedd tywydd eraill.
Note that these are real-time data and are not quality-controlled. Long-range graphs are plotted from a randomised subsample of half-hourly data.
Second Severn Crossing
Tide Levels and HarmonicsData llanw diweddaraf (Predicted Tide Table)
| Amser (ASG) | Codiad | Gweddill |
|---|---|---|
| 17-03-2025 05:30 | 4.93 | -0.2 |
| Penllanw nesaf | Distyll nesaf |
|---|---|
| 09:01, 12.86 | 15:40, 1.41 |
| Dyddiad | Uchaf 2025 | Dyddiad | Isaf 2025 |
|---|---|---|---|
| 02-03 | 14.2m | 02-03 | 0.05m |
Second Severn Crossing Predicted Tide Table (Chart Datum)
| 17-03-2025 | 18-03-2025 | 19-03-2025 | ||||||
|---|---|---|---|---|---|---|---|---|
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 09:01 21:15 | 12.86m 12.61m | High | 09:26 21:39 | 12.46m 12.15m | High | 09:51 22:04 | 11.98m 11.64m |
| Low | 03:25 15:40 | 1.11m 1.41m | Low | 03:49 16:02 | 1.36m 1.67m | Low | 04:12 16:24 | 1.66m 1.97m |
| 20-03-2025 | 21-03-2025 | 22-03-2025 | ||||||
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 10:19 22:32 | 11.43m 11.09m | High | 10:52 23:08 | 10.81m 10.47m | High | 11:35 | 10.14m |
| Low | 04:36 16:49 | 2.01m 2.31m | Low | 05:04 17:18 | 2.44m 2.75m | Low | 05:38 17:54 | 2.97m 3.32m |
