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 |
|---|---|---|
| 14-03-2026 08:10 | 4.71 | -0.02 |
| Penllanw nesaf | Distyll nesaf |
|---|---|
| 15:31, 9.06 | 08:46, 4.66 |
| Dyddiad | Uchaf 2026 | Dyddiad | Isaf 2026 |
|---|---|---|---|
| 04-02 | 14.02m | 06-03 | 0.49m |
Second Severn Crossing Predicted Tide Table (Chart Datum)
| 14-03-2026 | 15-03-2026 | 16-03-2026 | ||||||
|---|---|---|---|---|---|---|---|---|
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 02:43 15:31 | 8.97m 9.06m | High | 04:17 16:51 | 9.61m 9.94m | High | 05:21 17:48 | 10.72m 11.13m |
| Low | 08:46 22:03 | 4.66m 4.66m | Low | 10:58 23:33 | 4.02m 3.71m | Low | 12:03 | 3.00m |
| 17-03-2026 | 18-03-2026 | 19-03-2026 | ||||||
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 06:11 18:34 | 11.91m 12.30m | High | 06:53 19:14 | 12.94m 13.22m | High | 07:33 19:52 | 13.65m 13.77m |
| Low | 00:31 12:56 | 2.63m 1.99m | Low | 01:19 13:42 | 1.65m 1.14m | Low | 02:03 14:24 | 0.91m 0.56m |
