National Network of Regional Coastal Monitoring Programmes

« Dychwelid at fap am donau, llanw a gorsafoedd tywydd eraill.

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


Live wave 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

Data Ton Ddiweddaraf
Dyddiad/Amser (ASG)23-05-2024 15:30
Uchder ton (m)0.11
Uchder uchaf ton (m)0.2
Tbrig (s)-
Tz (s)1.9
Cyfeiriad mwyaf cyffredin (gradd)-
Ymlediad (gradd)-
Tymheredd y môr (°C)-
Energy Period (s)-
Wave Power (kW/m)-
Data Llanw Diweddaraf
Dyddiad/Amser (ASG)23-05-2024 16:20
Uchder llanw (m)6.82