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.

Porthleven

Wave Spectra for 16/12/2025 20:01 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 (16/12/2025 20:01 GMT)
Significant Wave Height (m)1.16
Wave zero up crossing period (Spectrum Tz) (s)7.8
Wind Wave Significant Wave Height (m)0.67
Wind Wave Peak Period (s)7.7
Wind Wave Peak Period Direction (°)226
Swell Significant Wave Height (m)0.98
Swell Peak Period (s)15.4
Swell Peak Period Direction (°)239.1
% Swell67.9