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 |
|---|---|---|
| 22-04-2026 17:50 | 2.77 | 0.17 |
| Penllanw nesaf | Distyll nesaf |
|---|---|
| 22:52, 11.69 | 05:27, 2.35 |
| Dyddiad | Uchaf 2026 | Dyddiad | Isaf 2026 |
|---|---|---|---|
| 04-02 | 14.02m | 21-03 | 0.33m |
Second Severn Crossing Predicted Tide Table (Chart Datum)
| 22-04-2026 | 23-04-2026 | 24-04-2026 | ||||||
|---|---|---|---|---|---|---|---|---|
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 10:35 22:52 | 11.92m 11.70m | High | 11:27 23:48 | 11.08m 10.93m | High | 12:31 | 10.39m |
| Low | 04:47 17:04 | 1.64m 2.11m | Low | 05:27 17:45 | 2.35m 2.85m | Low | 06:17 18:42 | 3.06m 3.53m |
| 25-04-2026 | 26-04-2026 | 27-04-2026 | ||||||
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 00:59 13:49 | 10.38m 10.08m | High | 02:22 15:07 | 10.32m 10.31m | High | 03:39 16:16 | 10.78m 10.96m |
| Low | 07:38 20:17 | 3.56m 3.82m | Low | 09:12 21:45 | 3.43m 3.39m | Low | 10:24 22:51 | 2.87m 2.65m |
