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 |
|---|---|---|
| 19-07-2025 01:40 | 10.84 | -0.18 |
| Penllanw nesaf | Distyll nesaf |
|---|---|
| 13:23, 11.22 | 07:13, 2.40 |
| Dyddiad | Uchaf 2025 | Dyddiad | Isaf 2025 |
|---|---|---|---|
| 27-04 | 15.33m | 31-03 | 0.03m |
Second Severn Crossing Predicted Tide Table (Chart Datum)
| 19-07-2025 | 20-07-2025 | 21-07-2025 | ||||||
|---|---|---|---|---|---|---|---|---|
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 00:52 13:23 | 11.48m 11.22m | High | 02:00 14:34 | 11.14m 10.99m | High | 03:16 15:52 | 10.95m 11.03m |
| Low | 07:13 19:37 | 2.40m 2.82m | Low | 08:14 20:55 | 2.83m 3.16m | Low | 09:41 22:30 | 3.12m 3.16m |
| 22-07-2025 | 23-07-2025 | 24-07-2025 | ||||||
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 04:33 17:05 | 11.06m 11.38m | High | 05:44 18:11 | 11.45m 11.93m | High | 06:46 19:07 | 11.98m 12.48m |
| Low | 11:08 23:51 | 3.00m 2.79m | Low | 12:22 | 2.60m | Low | 01:01 13:25 | 2.28m 2.14m |
