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
17-03-2026 14:505.090.48
 Next HWNext LW
18:34, 12.3 01:19, 1.65
Date Highest 2026 Date Lowest 2026
04-02 14.02m 06-03 0.49m

Second Severn Crossing Predicted Tide Table (Chart Datum)

17-03-202618-03-202619-03-2026
 Time (GMT)Height Time (GMT)Height Time (GMT)Height
High06:11
18:34
11.91m
12.30m
High06:53
19:14
12.94m
13.22m
High07:33
19:52
13.65m
13.77m
Low00:31
12:56
2.63m
1.99m
Low01:19
13:42
1.65m
1.14m
Low02:03
14:24
0.91m
0.56m
20-03-202621-03-202622-03-2026
 Time (GMT)Height Time (GMT)Height Time (GMT)Height
High08:10
20:28
13.97m
13.92m
High08:47
21:04
13.92m
13.73m
High09:24
21:41
13.56m
13.27m
Low02:42
15:02
0.48m
0.30m
Low03:19
15:38
0.38m
0.36m
Low03:53
16:11
0.55m
0.68m