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 |
|---|---|---|
| 10-10-2026 23:30 | 4.89 | 0.1 |
| Penllanw nesaf | Distyll nesaf |
|---|---|
| 07:29, 13.86 | 01:52, 0.66 |
| Dyddiad | Uchaf 2026 | Dyddiad | Isaf 2026 |
|---|---|---|---|
| 29-09 | 14.09m | 21-03 | 0.33m |
Second Severn Crossing Predicted Tide Table (Chart Datum)
| 11-10-2026 | 12-10-2026 | 13-10-2026 | ||||||
|---|---|---|---|---|---|---|---|---|
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 07:29 19:44 | 13.86m 13.90m | High | 08:03 20:17 | 13.72m 13.55m | High | 08:34 20:47 | 13.28m 12.98m |
| Low | 01:52 14:08 | 0.66m 0.69m | Low | 02:27 14:41 | 0.81m 0.94m | Low | 02:57 15:10 | 1.18m 1.39m |
| 14-10-2026 | 15-10-2026 | 16-10-2026 | ||||||
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 09:03 21:16 | 12.67m 12.31m | High | 09:30 21:44 | 12.00m 11.60m | High | 09:58 22:14 | 11.31m 10.87m |
| Low | 03:23 15:35 | 1.66m 1.90m | Low | 03:46 15:57 | 2.13m 2.38m | Low | 04:07 16:21 | 2.57m 2.85m |
