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)17-02-2026 21:00
Latitude-
Longitude-
Wave Height (m)0.14
Max Wave Height (m)0.26
Tpeak (s)7.1
Tz (s)1.6
Peak Direction (degrees)-
Spread (degrees)-
Sea Temp (°C)-
Energy Period (s)-
Wave Power (kW/m)-

Latest Tide Data

Latest Tide data
Time (GMT)17-02-2026 21:50
Elevation8.93
Residual-0.24
Next HW07:58, 13.25
Next LW02:26, 1.29
Highest Date04-02-2026
Highest Value14.02m
Lowest Date03-02-2026
Lowest Value0.75m