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 |
|---|---|---|
| 11-06-2026 10:20 | 3.36 | -0.02 |
| Penllanw nesaf | Distyll nesaf |
|---|---|
| 15:34, 11.24 | 22:00, 3.06 |
| Dyddiad | Uchaf 2026 | Dyddiad | Isaf 2026 |
|---|---|---|---|
| 04-02 | 14.02m | 21-03 | 0.33m |
Second Severn Crossing Predicted Tide Table (Chart Datum)
| 11-06-2026 | 12-06-2026 | 13-06-2026 | ||||||
|---|---|---|---|---|---|---|---|---|
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 03:00 15:34 | 11.03m 11.24m | High | 04:09 16:40 | 11.58m 11.90m | High | 05:13 17:41 | 12.19m 12.55m |
| Low | 09:17 22:00 | 2.96m 3.06m | Low | 10:42 23:21 | 2.60m 2.52m | Low | 11:54 | 2.09m |
| 14-06-2026 | 15-06-2026 | 16-06-2026 | ||||||
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 06:12 18:36 | 12.70m 13.04m | High | 07:07 19:28 | 13.02m 13.28m | High | 07:59 20:17 | 13.09m 13.25m |
| Low | 00:28 12:56 | 1.92m 1.63m | Low | 01:27 13:52 | 1.45m 1.34m | Low | 02:21 14:43 | 1.20m 1.27m |
