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
06-12-2025 03:102.520.61
 Next HWNext LW
07:51, 13.55 14:42, 1.21
Date Highest 2025 Date Lowest 2025
27-04 15.33m 31-03 0.03m

Second Severn Crossing Predicted Tide Table (Chart Datum)

06-12-202507-12-202508-12-2025
 Time (GMT)Height Time (GMT)Height Time (GMT)Height
High07:51
20:19
13.55m
13.29m
High08:37
21:05
13.26m
12.83m
High09:22
21:50
12.79m
12.26m
Low02:16
14:42
1.08m
1.21m
Low03:02
15:29
1.30m
1.51m
Low03:46
16:13
1.72m
1.97m
09-12-202510-12-202511-12-2025
 Time (GMT)Height Time (GMT)Height Time (GMT)Height
High10:07
22:35
12.26m
11.68m
High10:52
23:21
11.75m
11.15m
High11:40
11.29m
Low04:26
16:55
2.23m
2.46m
Low05:06
17:37
2.72m
2.91m
Low05:46
18:20
3.12m
3.26m