National Network of Regional Coastal Monitoring Programmes

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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 Harmonics

 


Latest Tide Data (Predicted Tide Table)

Time (GMT)ElevationResidual
17-07-2025 05:202.260.15
 Next HWNext LW
11:33, 11.77 05:47, 1.95
Date Highest 2025 Date Lowest 2025
27-04 15.33m 31-03 0.03m

Second Severn Crossing Predicted Tide Table (Chart Datum)

17-07-202518-07-202519-07-2025
 Time (GMT)Height Time (GMT)Height Time (GMT)Height
High11:33
23:56
11.77m
11.81m
High12:23
11.51m
High00:52
13:23
11.48m
11.22m
Low05:47
18:00
1.95m
2.29m
Low06:26
18:42
2.10m
2.49m
Low07:13
19:37
2.40m
2.82m
20-07-202521-07-202522-07-2025
 Time (GMT)Height Time (GMT)Height Time (GMT)Height
High02:00
14:34
11.14m
10.99m
High03:16
15:52
10.95m
11.03m
High04:33
17:05
11.06m
11.38m
Low08:14
20:55
2.83m
3.16m
Low09:41
22:30
3.12m
3.16m
Low11:08
23:51
3.00m
2.79m