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

  

Live water level data (OD) Data (GMT) (updated every 5 seconds)

This one-second stream of data to the website is experimental and is being developed in conjunction with Fugro GB Limited

Latest Wave Data

Latest Wave Data
Time (GMT)18-06-2026 08:00
Latitude-
Longitude-
Wave Height (m)0.11
Max Wave Height (m)0.2
Tpeak (s)12.8
Tz (s)2
Peak Direction (degrees)-
Spread (degrees)-
Sea Temp (°C)-
Energy Period (s)-
Wave Power (kW/m)-

Latest Tide Data

Latest Tide data
Time (GMT)18-06-2026 08:30
Elevation11.64
Residual0.3
Next HW09:34, 12.63
Next LW16:15, 1.68
Highest Date04-02-2026
Highest Value14.02m
Lowest Date21-03-2026
Lowest Value0.33m