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

Wave Spectra for 11/02/2025 03:30 GMT

Wave Spectra page developed in conjunction with Fugro GB Limited.

(i) stands for Iridium

Turning point search range: (Min>5): to (Max<40):  
Sea and Swell Summary for (11/02/2025 03:30 GMT)
Significant Wave Height (m)0.11
Wave zero up crossing period (Spectrum Tz) (s)6.2
Wind Wave Significant Wave Height (m)0.04
Wind Wave Peak Period (s)6.1
Wind Wave Peak Period Direction (°)0
Swell Significant Wave Height (m)0.02
Swell Peak Period (s)31.9
Swell Peak Period Direction (°)0
% Swell14.6