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 |
|---|---|---|
| 06-03-2026 04:40 | 2.02 | -0.36 |
| Penllanw nesaf | Distyll nesaf |
|---|---|
| 09:02, 13.48 | 15:45, 1.08 |
| Dyddiad | Uchaf 2026 | Dyddiad | Isaf 2026 |
|---|---|---|---|
| 04-02 | 14.02m | 06-03 | 0.49m |
Second Severn Crossing Predicted Tide Table (Chart Datum)
| 06-03-2026 | 07-03-2026 | 08-03-2026 | ||||||
|---|---|---|---|---|---|---|---|---|
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 09:02 21:18 | 13.48m 13.18m | High | 09:31 21:46 | 13.04m 12.66m | High | 09:58 22:13 | 12.48m 12.06m |
| Low | 03:28 15:45 | 0.80m 1.08m | Low | 03:54 16:08 | 1.12m 1.45m | Low | 04:16 16:28 | 1.48m 1.81m |
| 09-03-2026 | 10-03-2026 | 11-03-2026 | ||||||
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 10:26 22:40 | 11.83m 11.39m | High | 10:56 23:12 | 11.10m 10.66m | High | 11:33 23:54 | 10.30m 9.88m |
| Low | 04:37 16:49 | 1.85m 2.17m | Low | 05:01 17:15 | 2.29m 2.62m | Low | 05:32 17:47 | 2.86m 3.24m |
