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 |
|---|---|---|
| 24-06-2025 12:40 | 1.79 | -0.1 |
| Penllanw nesaf | Distyll nesaf |
|---|---|
| 18:20, 12.65 | 01:09, 1.73 |
| Dyddiad | Uchaf 2025 | Dyddiad | Isaf 2025 |
|---|---|---|---|
| 27-04 | 15.33m | 31-03 | 0.03m |
Second Severn Crossing Predicted Tide Table (Chart Datum)
| 24-06-2025 | 25-06-2025 | 26-06-2025 | ||||||
|---|---|---|---|---|---|---|---|---|
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 05:54 18:20 | 12.37m 12.65m | High | 06:52 19:14 | 12.61m 12.86m | High | 07:44 20:03 | 12.69m 12.87m |
| Low | 00:06 12:35 | 2.08m 1.88m | Low | 01:09 13:34 | 1.73m 1.68m | Low | 02:05 14:26 | 1.56m 1.64m |
| 27-06-2025 | 28-06-2025 | 29-06-2025 | ||||||
| Time (GMT) | Height | Time (GMT) | Height | Time (GMT) | Height | |||
| High | 08:32 20:48 | 12.58m 12.69m | High | 09:16 21:30 | 12.33m 12.41m | High | 09:56 22:09 | 11.99m 12.07m |
| Low | 02:56 15:13 | 1.59m 1.77m | Low | 03:41 15:54 | 1.79m 2.03m | Low | 04:20 16:30 | 2.08m 2.34m |
